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1 <!doctype html>
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2
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3 <title>CodeMirror: CoffeeScript mode</title>
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4 <meta charset="utf-8"/>
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5 <link rel=stylesheet href="../../doc/docs.css">
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6
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7 <link rel="stylesheet" href="../../lib/codemirror.css">
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8 <script src="../../lib/codemirror.js"></script>
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9 <script src="coffeescript.js"></script>
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10 <style>.CodeMirror {border-top: 1px solid silver; border-bottom: 1px solid silver;}</style>
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11 <div id=nav>
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12 <a href="https://codemirror.net/5"><h1>CodeMirror</h1><img id=logo src="../../doc/logo.png" alt=""></a>
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13
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14 <ul>
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15 <li><a href="../../index.html">Home</a>
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16 <li><a href="../../doc/manual.html">Manual</a>
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17 <li><a href="https://github.com/codemirror/codemirror5">Code</a>
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18 </ul>
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19 <ul>
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20 <li><a href="../index.html">Language modes</a>
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21 <li><a class=active href="#">CoffeeScript</a>
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22 </ul>
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23 </div>
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24
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25 <article>
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26 <h2>CoffeeScript mode</h2>
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27 <form><textarea id="code" name="code">
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28 # CoffeeScript mode for CodeMirror
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29 # Copyright (c) 2011 Jeff Pickhardt, released under
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30 # the MIT License.
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31 #
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32 # Modified from the Python CodeMirror mode, which also is
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33 # under the MIT License Copyright (c) 2010 Timothy Farrell.
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34 #
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35 # The following script, Underscore.coffee, is used to
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36 # demonstrate CoffeeScript mode for CodeMirror.
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37 #
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38 # To download CoffeeScript mode for CodeMirror, go to:
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39 # https://github.com/pickhardt/coffeescript-codemirror-mode
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40
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41 # **Underscore.coffee
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42 # (c) 2011 Jeremy Ashkenas, DocumentCloud Inc.**
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43 # Underscore is freely distributable under the terms of the
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44 # [MIT license](http://en.wikipedia.org/wiki/MIT_License).
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45 # Portions of Underscore are inspired by or borrowed from
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46 # [Prototype.js](http://prototypejs.org/api), Oliver Steele's
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47 # [Functional](http://osteele.com), and John Resig's
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48 # [Micro-Templating](http://ejohn.org).
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49 # For all details and documentation:
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50 # http://documentcloud.github.com/underscore/
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51
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52
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53 # Baseline setup
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54 # --------------
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55
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56 # Establish the root object, `window` in the browser, or `global` on the server.
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57 root = this
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58
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59
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60 # Save the previous value of the `_` variable.
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61 previousUnderscore = root._
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62
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63 ### Multiline
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64 comment
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65 ###
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66
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67 # Establish the object that gets thrown to break out of a loop iteration.
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68 # `StopIteration` is SOP on Mozilla.
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69 breaker = if typeof(StopIteration) is 'undefined' then '__break__' else StopIteration
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70
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71
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72 #### Docco style single line comment (title)
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73
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74
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75 # Helper function to escape **RegExp** contents, because JS doesn't have one.
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76 escapeRegExp = (string) -> string.replace(/([.*+?^${}()|[\]\/\\])/g, '\\$1')
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77
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78
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79 # Save bytes in the minified (but not gzipped) version:
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80 ArrayProto = Array.prototype
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81 ObjProto = Object.prototype
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82
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83
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84 # Create quick reference variables for speed access to core prototypes.
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85 slice = ArrayProto.slice
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86 unshift = ArrayProto.unshift
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87 toString = ObjProto.toString
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88 hasOwnProperty = ObjProto.hasOwnProperty
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89 propertyIsEnumerable = ObjProto.propertyIsEnumerable
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90
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91
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92 # All **ECMA5** native implementations we hope to use are declared here.
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93 nativeForEach = ArrayProto.forEach
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94 nativeMap = ArrayProto.map
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95 nativeReduce = ArrayProto.reduce
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96 nativeReduceRight = ArrayProto.reduceRight
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97 nativeFilter = ArrayProto.filter
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98 nativeEvery = ArrayProto.every
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99 nativeSome = ArrayProto.some
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100 nativeIndexOf = ArrayProto.indexOf
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101 nativeLastIndexOf = ArrayProto.lastIndexOf
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102 nativeIsArray = Array.isArray
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103 nativeKeys = Object.keys
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104
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105
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106 # Create a safe reference to the Underscore object for use below.
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107 _ = (obj) -> new wrapper(obj)
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108
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109
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110 # Export the Underscore object for **CommonJS**.
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111 if typeof(exports) != 'undefined' then exports._ = _
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112
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113
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114 # Export Underscore to global scope.
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115 root._ = _
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116
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117
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118 # Current version.
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119 _.VERSION = '1.1.0'
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120
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121
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122 # Collection Functions
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123 # --------------------
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124
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125 # The cornerstone, an **each** implementation.
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126 # Handles objects implementing **forEach**, arrays, and raw objects.
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127 _.each = (obj, iterator, context) ->
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128 try
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129 if nativeForEach and obj.forEach is nativeForEach
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130 obj.forEach iterator, context
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131 else if _.isNumber obj.length
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132 iterator.call context, obj[i], i, obj for i in [0...obj.length]
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133 else
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134 iterator.call context, val, key, obj for own key, val of obj
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135 catch e
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136 throw e if e isnt breaker
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137 obj
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138
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139
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140 # Return the results of applying the iterator to each element. Use JavaScript
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141 # 1.6's version of **map**, if possible.
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142 _.map = (obj, iterator, context) ->
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143 return obj.map(iterator, context) if nativeMap and obj.map is nativeMap
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144 results = []
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145 _.each obj, (value, index, list) ->
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146 results.push iterator.call context, value, index, list
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147 results
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148
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149
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150 # **Reduce** builds up a single result from a list of values. Also known as
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151 # **inject**, or **foldl**. Uses JavaScript 1.8's version of **reduce**, if possible.
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152 _.reduce = (obj, iterator, memo, context) ->
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153 if nativeReduce and obj.reduce is nativeReduce
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154 iterator = _.bind iterator, context if context
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155 return obj.reduce iterator, memo
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156 _.each obj, (value, index, list) ->
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157 memo = iterator.call context, memo, value, index, list
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158 memo
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159
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160
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161 # The right-associative version of **reduce**, also known as **foldr**. Uses
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162 # JavaScript 1.8's version of **reduceRight**, if available.
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163 _.reduceRight = (obj, iterator, memo, context) ->
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164 if nativeReduceRight and obj.reduceRight is nativeReduceRight
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165 iterator = _.bind iterator, context if context
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166 return obj.reduceRight iterator, memo
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167 reversed = _.clone(_.toArray(obj)).reverse()
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168 _.reduce reversed, iterator, memo, context
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169
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170
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171 # Return the first value which passes a truth test.
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172 _.detect = (obj, iterator, context) ->
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173 result = null
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174 _.each obj, (value, index, list) ->
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175 if iterator.call context, value, index, list
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176 result = value
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177 _.breakLoop()
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178 result
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179
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180
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181 # Return all the elements that pass a truth test. Use JavaScript 1.6's
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182 # **filter**, if it exists.
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183 _.filter = (obj, iterator, context) ->
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184 return obj.filter iterator, context if nativeFilter and obj.filter is nativeFilter
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185 results = []
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186 _.each obj, (value, index, list) ->
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187 results.push value if iterator.call context, value, index, list
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188 results
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189
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190
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191 # Return all the elements for which a truth test fails.
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192 _.reject = (obj, iterator, context) ->
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193 results = []
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194 _.each obj, (value, index, list) ->
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195 results.push value if not iterator.call context, value, index, list
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196 results
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197
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198
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199 # Determine whether all of the elements match a truth test. Delegate to
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200 # JavaScript 1.6's **every**, if it is present.
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201 _.every = (obj, iterator, context) ->
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202 iterator ||= _.identity
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203 return obj.every iterator, context if nativeEvery and obj.every is nativeEvery
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204 result = true
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205 _.each obj, (value, index, list) ->
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206 _.breakLoop() unless (result = result and iterator.call(context, value, index, list))
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207 result
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208
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209
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210 # Determine if at least one element in the object matches a truth test. Use
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211 # JavaScript 1.6's **some**, if it exists.
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212 _.some = (obj, iterator, context) ->
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213 iterator ||= _.identity
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214 return obj.some iterator, context if nativeSome and obj.some is nativeSome
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215 result = false
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216 _.each obj, (value, index, list) ->
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217 _.breakLoop() if (result = iterator.call(context, value, index, list))
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218 result
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219
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220
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221 # Determine if a given value is included in the array or object,
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222 # based on `===`.
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223 _.include = (obj, target) ->
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224 return _.indexOf(obj, target) isnt -1 if nativeIndexOf and obj.indexOf is nativeIndexOf
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225 return true for own key, val of obj when val is target
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226 false
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227
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228
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229 # Invoke a method with arguments on every item in a collection.
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230 _.invoke = (obj, method) ->
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231 args = _.rest arguments, 2
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232 (if method then val[method] else val).apply(val, args) for val in obj
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233
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234
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235 # Convenience version of a common use case of **map**: fetching a property.
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236 _.pluck = (obj, key) ->
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237 _.map(obj, (val) -> val[key])
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238
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239
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240 # Return the maximum item or (item-based computation).
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241 _.max = (obj, iterator, context) ->
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242 return Math.max.apply(Math, obj) if not iterator and _.isArray(obj)
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243 result = computed: -Infinity
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244 _.each obj, (value, index, list) ->
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245 computed = if iterator then iterator.call(context, value, index, list) else value
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246 computed >= result.computed and (result = {value: value, computed: computed})
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247 result.value
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248
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249
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250 # Return the minimum element (or element-based computation).
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251 _.min = (obj, iterator, context) ->
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252 return Math.min.apply(Math, obj) if not iterator and _.isArray(obj)
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253 result = computed: Infinity
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254 _.each obj, (value, index, list) ->
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255 computed = if iterator then iterator.call(context, value, index, list) else value
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256 computed < result.computed and (result = {value: value, computed: computed})
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257 result.value
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258
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259
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260 # Sort the object's values by a criterion produced by an iterator.
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261 _.sortBy = (obj, iterator, context) ->
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262 _.pluck(((_.map obj, (value, index, list) ->
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263 {value: value, criteria: iterator.call(context, value, index, list)}
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264 ).sort((left, right) ->
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265 a = left.criteria; b = right.criteria
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266 if a < b then -1 else if a > b then 1 else 0
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267 )), 'value')
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268
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269
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270 # Use a comparator function to figure out at what index an object should
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271 # be inserted so as to maintain order. Uses binary search.
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272 _.sortedIndex = (array, obj, iterator) ->
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273 iterator ||= _.identity
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274 low = 0
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275 high = array.length
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276 while low < high
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277 mid = (low + high) >> 1
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278 if iterator(array[mid]) < iterator(obj) then low = mid + 1 else high = mid
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279 low
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280
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281
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282 # Convert anything iterable into a real, live array.
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283 _.toArray = (iterable) ->
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284 return [] if (!iterable)
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285 return iterable.toArray() if (iterable.toArray)
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286 return iterable if (_.isArray(iterable))
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287 return slice.call(iterable) if (_.isArguments(iterable))
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288 _.values(iterable)
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289
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290
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291 # Return the number of elements in an object.
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292 _.size = (obj) -> _.toArray(obj).length
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293
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294
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295 # Array Functions
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296 # ---------------
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297
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298 # Get the first element of an array. Passing `n` will return the first N
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299 # values in the array. Aliased as **head**. The `guard` check allows it to work
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300 # with **map**.
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301 _.first = (array, n, guard) ->
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302 if n and not guard then slice.call(array, 0, n) else array[0]
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303
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304
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305 # Returns everything but the first entry of the array. Aliased as **tail**.
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306 # Especially useful on the arguments object. Passing an `index` will return
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307 # the rest of the values in the array from that index onward. The `guard`
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308 # check allows it to work with **map**.
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309 _.rest = (array, index, guard) ->
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310 slice.call(array, if _.isUndefined(index) or guard then 1 else index)
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311
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312
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313 # Get the last element of an array.
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314 _.last = (array) -> array[array.length - 1]
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315
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316
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317 # Trim out all falsy values from an array.
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318 _.compact = (array) -> item for item in array when item
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319
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320
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321 # Return a completely flattened version of an array.
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322 _.flatten = (array) ->
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323 _.reduce array, (memo, value) ->
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324 return memo.concat(_.flatten(value)) if _.isArray value
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325 memo.push value
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326 memo
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327 , []
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328
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329
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330 # Return a version of the array that does not contain the specified value(s).
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331 _.without = (array) ->
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332 values = _.rest arguments
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333 val for val in _.toArray(array) when not _.include values, val
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334
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335
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336 # Produce a duplicate-free version of the array. If the array has already
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337 # been sorted, you have the option of using a faster algorithm.
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338 _.uniq = (array, isSorted) ->
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339 memo = []
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340 for el, i in _.toArray array
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341 memo.push el if i is 0 || (if isSorted is true then _.last(memo) isnt el else not _.include(memo, el))
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342 memo
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343
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344
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345 # Produce an array that contains every item shared between all the
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346 # passed-in arrays.
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347 _.intersect = (array) ->
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348 rest = _.rest arguments
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349 _.select _.uniq(array), (item) ->
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350 _.all rest, (other) ->
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351 _.indexOf(other, item) >= 0
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352
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353
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354 # Zip together multiple lists into a single array -- elements that share
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355 # an index go together.
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356 _.zip = ->
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357 length = _.max _.pluck arguments, 'length'
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358 results = new Array length
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359 for i in [0...length]
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360 results[i] = _.pluck arguments, String i
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361 results
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362
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363
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364 # If the browser doesn't supply us with **indexOf** (I'm looking at you, MSIE),
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365 # we need this function. Return the position of the first occurrence of an
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366 # item in an array, or -1 if the item is not included in the array.
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367 _.indexOf = (array, item) ->
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368 return array.indexOf item if nativeIndexOf and array.indexOf is nativeIndexOf
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369 i = 0; l = array.length
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370 while l - i
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371 if array[i] is item then return i else i++
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372 -1
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373
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374
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375 # Provide JavaScript 1.6's **lastIndexOf**, delegating to the native function,
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376 # if possible.
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377 _.lastIndexOf = (array, item) ->
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378 return array.lastIndexOf(item) if nativeLastIndexOf and array.lastIndexOf is nativeLastIndexOf
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379 i = array.length
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380 while i
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381 if array[i] is item then return i else i--
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382 -1
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383
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384
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385 # Generate an integer Array containing an arithmetic progression. A port of
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386 # [the native Python **range** function](http://docs.python.org/library/functions.html#range).
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387 _.range = (start, stop, step) ->
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388 a = arguments
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389 solo = a.length <= 1
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390 i = start = if solo then 0 else a[0]
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391 stop = if solo then a[0] else a[1]
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392 step = a[2] or 1
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393 len = Math.ceil((stop - start) / step)
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394 return [] if len <= 0
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395 range = new Array len
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396 idx = 0
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397 loop
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398 return range if (if step > 0 then i - stop else stop - i) >= 0
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399 range[idx] = i
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400 idx++
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401 i+= step
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402
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403
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404 # Function Functions
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405 # ------------------
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406
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407 # Create a function bound to a given object (assigning `this`, and arguments,
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408 # optionally). Binding with arguments is also known as **curry**.
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409 _.bind = (func, obj) ->
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410 args = _.rest arguments, 2
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411 -> func.apply obj or root, args.concat arguments
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412
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413
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414 # Bind all of an object's methods to that object. Useful for ensuring that
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415 # all callbacks defined on an object belong to it.
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416 _.bindAll = (obj) ->
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417 funcs = if arguments.length > 1 then _.rest(arguments) else _.functions(obj)
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418 _.each funcs, (f) -> obj[f] = _.bind obj[f], obj
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419 obj
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420
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421
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422 # Delays a function for the given number of milliseconds, and then calls
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423 # it with the arguments supplied.
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424 _.delay = (func, wait) ->
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425 args = _.rest arguments, 2
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426 setTimeout((-> func.apply(func, args)), wait)
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427
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428
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429 # Memoize an expensive function by storing its results.
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430 _.memoize = (func, hasher) ->
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431 memo = {}
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432 hasher or= _.identity
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433 ->
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434 key = hasher.apply this, arguments
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435 return memo[key] if key of memo
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436 memo[key] = func.apply this, arguments
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437
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438
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439 # Defers a function, scheduling it to run after the current call stack has
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440 # cleared.
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441 _.defer = (func) ->
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442 _.delay.apply _, [func, 1].concat _.rest arguments
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443
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444
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445 # Returns the first function passed as an argument to the second,
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446 # allowing you to adjust arguments, run code before and after, and
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447 # conditionally execute the original function.
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448 _.wrap = (func, wrapper) ->
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449 -> wrapper.apply wrapper, [func].concat arguments
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450
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451
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452 # Returns a function that is the composition of a list of functions, each
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453 # consuming the return value of the function that follows.
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454 _.compose = ->
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455 funcs = arguments
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456 ->
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457 args = arguments
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458 for i in [funcs.length - 1..0] by -1
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459 args = [funcs[i].apply(this, args)]
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460 args[0]
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461
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462
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463 # Object Functions
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464 # ----------------
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465
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466 # Retrieve the names of an object's properties.
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467 _.keys = nativeKeys or (obj) ->
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468 return _.range 0, obj.length if _.isArray(obj)
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469 key for key, val of obj
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470
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471
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472 # Retrieve the values of an object's properties.
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473 _.values = (obj) ->
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474 _.map obj, _.identity
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475
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476
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477 # Return a sorted list of the function names available in Underscore.
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478 _.functions = (obj) ->
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479 _.filter(_.keys(obj), (key) -> _.isFunction(obj[key])).sort()
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480
|
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481
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482 # Extend a given object with all of the properties in a source object.
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483 _.extend = (obj) ->
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484 for source in _.rest(arguments)
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485 obj[key] = val for key, val of source
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486 obj
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487
|
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488
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489 # Create a (shallow-cloned) duplicate of an object.
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490 _.clone = (obj) ->
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491 return obj.slice 0 if _.isArray obj
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492 _.extend {}, obj
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493
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494
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495 # Invokes interceptor with the obj, and then returns obj.
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496 # The primary purpose of this method is to "tap into" a method chain,
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497 # in order to perform operations on intermediate results within
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498 the chain.
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499 _.tap = (obj, interceptor) ->
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500 interceptor obj
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501 obj
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502
|
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503
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504 # Perform a deep comparison to check if two objects are equal.
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505 _.isEqual = (a, b) ->
|
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506 # Check object identity.
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507 return true if a is b
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508 # Different types?
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509 atype = typeof(a); btype = typeof(b)
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510 return false if atype isnt btype
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511 # Basic equality test (watch out for coercions).
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512 return true if `a == b`
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513 # One is falsy and the other truthy.
|
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514 return false if (!a and b) or (a and !b)
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515 # One of them implements an `isEqual()`?
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516 return a.isEqual(b) if a.isEqual
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517 # Check dates' integer values.
|
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518 return a.getTime() is b.getTime() if _.isDate(a) and _.isDate(b)
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519 # Both are NaN?
|
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520 return false if _.isNaN(a) and _.isNaN(b)
|
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521 # Compare regular expressions.
|
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522 if _.isRegExp(a) and _.isRegExp(b)
|
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523 return a.source is b.source and
|
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524 a.global is b.global and
|
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525 a.ignoreCase is b.ignoreCase and
|
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526 a.multiline is b.multiline
|
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527 # If a is not an object by this point, we can't handle it.
|
|
528 return false if atype isnt 'object'
|
|
529 # Check for different array lengths before comparing contents.
|
|
530 return false if a.length and (a.length isnt b.length)
|
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531 # Nothing else worked, deep compare the contents.
|
|
532 aKeys = _.keys(a); bKeys = _.keys(b)
|
|
533 # Different object sizes?
|
|
534 return false if aKeys.length isnt bKeys.length
|
|
535 # Recursive comparison of contents.
|
|
536 return false for key, val of a when !(key of b) or !_.isEqual(val, b[key])
|
|
537 true
|
|
538
|
|
539
|
|
540 # Is a given array or object empty?
|
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541 _.isEmpty = (obj) ->
|
|
542 return obj.length is 0 if _.isArray(obj) or _.isString(obj)
|
|
543 return false for own key of obj
|
|
544 true
|
|
545
|
|
546
|
|
547 # Is a given value a DOM element?
|
|
548 _.isElement = (obj) -> obj and obj.nodeType is 1
|
|
549
|
|
550
|
|
551 # Is a given value an array?
|
|
552 _.isArray = nativeIsArray or (obj) -> !!(obj and obj.concat and obj.unshift and not obj.callee)
|
|
553
|
|
554
|
|
555 # Is a given variable an arguments object?
|
|
556 _.isArguments = (obj) -> obj and obj.callee
|
|
557
|
|
558
|
|
559 # Is the given value a function?
|
|
560 _.isFunction = (obj) -> !!(obj and obj.constructor and obj.call and obj.apply)
|
|
561
|
|
562
|
|
563 # Is the given value a string?
|
|
564 _.isString = (obj) -> !!(obj is '' or (obj and obj.charCodeAt and obj.substr))
|
|
565
|
|
566
|
|
567 # Is a given value a number?
|
|
568 _.isNumber = (obj) -> (obj is +obj) or toString.call(obj) is '[object Number]'
|
|
569
|
|
570
|
|
571 # Is a given value a boolean?
|
|
572 _.isBoolean = (obj) -> obj is true or obj is false
|
|
573
|
|
574
|
|
575 # Is a given value a Date?
|
|
576 _.isDate = (obj) -> !!(obj and obj.getTimezoneOffset and obj.setUTCFullYear)
|
|
577
|
|
578
|
|
579 # Is the given value a regular expression?
|
|
580 _.isRegExp = (obj) -> !!(obj and obj.exec and (obj.ignoreCase or obj.ignoreCase is false))
|
|
581
|
|
582
|
|
583 # Is the given value NaN -- this one is interesting. `NaN != NaN`, and
|
|
584 # `isNaN(undefined) == true`, so we make sure it's a number first.
|
|
585 _.isNaN = (obj) -> _.isNumber(obj) and window.isNaN(obj)
|
|
586
|
|
587
|
|
588 # Is a given value equal to null?
|
|
589 _.isNull = (obj) -> obj is null
|
|
590
|
|
591
|
|
592 # Is a given variable undefined?
|
|
593 _.isUndefined = (obj) -> typeof obj is 'undefined'
|
|
594
|
|
595
|
|
596 # Utility Functions
|
|
597 # -----------------
|
|
598
|
|
599 # Run Underscore.js in noConflict mode, returning the `_` variable to its
|
|
600 # previous owner. Returns a reference to the Underscore object.
|
|
601 _.noConflict = ->
|
|
602 root._ = previousUnderscore
|
|
603 this
|
|
604
|
|
605
|
|
606 # Keep the identity function around for default iterators.
|
|
607 _.identity = (value) -> value
|
|
608
|
|
609
|
|
610 # Run a function `n` times.
|
|
611 _.times = (n, iterator, context) ->
|
|
612 iterator.call context, i for i in [0...n]
|
|
613
|
|
614
|
|
615 # Break out of the middle of an iteration.
|
|
616 _.breakLoop = -> throw breaker
|
|
617
|
|
618
|
|
619 # Add your own custom functions to the Underscore object, ensuring that
|
|
620 # they're correctly added to the OOP wrapper as well.
|
|
621 _.mixin = (obj) ->
|
|
622 for name in _.functions(obj)
|
|
623 addToWrapper name, _[name] = obj[name]
|
|
624
|
|
625
|
|
626 # Generate a unique integer id (unique within the entire client session).
|
|
627 # Useful for temporary DOM ids.
|
|
628 idCounter = 0
|
|
629 _.uniqueId = (prefix) ->
|
|
630 (prefix or '') + idCounter++
|
|
631
|
|
632
|
|
633 # By default, Underscore uses **ERB**-style template delimiters, change the
|
|
634 # following template settings to use alternative delimiters.
|
|
635 _.templateSettings = {
|
|
636 start: '<%'
|
|
637 end: '%>'
|
|
638 interpolate: /<%=(.+?)%>/g
|
|
639 }
|
|
640
|
|
641
|
|
642 # JavaScript templating a-la **ERB**, pilfered from John Resig's
|
|
643 # *Secrets of the JavaScript Ninja*, page 83.
|
|
644 # Single-quote fix from Rick Strahl.
|
|
645 # With alterations for arbitrary delimiters, and to preserve whitespace.
|
|
646 _.template = (str, data) ->
|
|
647 c = _.templateSettings
|
|
648 endMatch = new RegExp("'(?=[^"+c.end.substr(0, 1)+"]*"+escapeRegExp(c.end)+")","g")
|
|
649 fn = new Function 'obj',
|
|
650 'var p=[],print=function(){p.push.apply(p,arguments);};' +
|
|
651 'with(obj||{}){p.push(\'' +
|
|
652 str.replace(/\r/g, '\\r')
|
|
653 .replace(/\n/g, '\\n')
|
|
654 .replace(/\t/g, '\\t')
|
|
655 .replace(endMatch,"���")
|
|
656 .split("'").join("\\'")
|
|
657 .split("���").join("'")
|
|
658 .replace(c.interpolate, "',$1,'")
|
|
659 .split(c.start).join("');")
|
|
660 .split(c.end).join("p.push('") +
|
|
661 "');}return p.join('');"
|
|
662 if data then fn(data) else fn
|
|
663
|
|
664
|
|
665 # Aliases
|
|
666 # -------
|
|
667
|
|
668 _.forEach = _.each
|
|
669 _.foldl = _.inject = _.reduce
|
|
670 _.foldr = _.reduceRight
|
|
671 _.select = _.filter
|
|
672 _.all = _.every
|
|
673 _.any = _.some
|
|
674 _.contains = _.include
|
|
675 _.head = _.first
|
|
676 _.tail = _.rest
|
|
677 _.methods = _.functions
|
|
678
|
|
679
|
|
680 # Setup the OOP Wrapper
|
|
681 # ---------------------
|
|
682
|
|
683 # If Underscore is called as a function, it returns a wrapped object that
|
|
684 # can be used OO-style. This wrapper holds altered versions of all the
|
|
685 # underscore functions. Wrapped objects may be chained.
|
|
686 wrapper = (obj) ->
|
|
687 this._wrapped = obj
|
|
688 this
|
|
689
|
|
690
|
|
691 # Helper function to continue chaining intermediate results.
|
|
692 result = (obj, chain) ->
|
|
693 if chain then _(obj).chain() else obj
|
|
694
|
|
695
|
|
696 # A method to easily add functions to the OOP wrapper.
|
|
697 addToWrapper = (name, func) ->
|
|
698 wrapper.prototype[name] = ->
|
|
699 args = _.toArray arguments
|
|
700 unshift.call args, this._wrapped
|
|
701 result func.apply(_, args), this._chain
|
|
702
|
|
703
|
|
704 # Add all ofthe Underscore functions to the wrapper object.
|
|
705 _.mixin _
|
|
706
|
|
707
|
|
708 # Add all mutator Array functions to the wrapper.
|
|
709 _.each ['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], (name) ->
|
|
710 method = Array.prototype[name]
|
|
711 wrapper.prototype[name] = ->
|
|
712 method.apply(this._wrapped, arguments)
|
|
713 result(this._wrapped, this._chain)
|
|
714
|
|
715
|
|
716 # Add all accessor Array functions to the wrapper.
|
|
717 _.each ['concat', 'join', 'slice'], (name) ->
|
|
718 method = Array.prototype[name]
|
|
719 wrapper.prototype[name] = ->
|
|
720 result(method.apply(this._wrapped, arguments), this._chain)
|
|
721
|
|
722
|
|
723 # Start chaining a wrapped Underscore object.
|
|
724 wrapper::chain = ->
|
|
725 this._chain = true
|
|
726 this
|
|
727
|
|
728
|
|
729 # Extracts the result from a wrapped and chained object.
|
|
730 wrapper::value = -> this._wrapped
|
|
731 </textarea></form>
|
|
732 <script>
|
|
733 var editor = CodeMirror.fromTextArea(document.getElementById("code"), {});
|
|
734 </script>
|
|
735
|
|
736 <p><strong>MIME types defined:</strong> <code>application/vnd.coffeescript</code>, <code>text/coffeescript</code>, <code>text/x-coffeescript</code>.</p>
|
|
737
|
|
738 <p>The CoffeeScript mode was written by Jeff Pickhardt.</p>
|
|
739
|
|
740 </article>
|