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diff .cms/lib/codemirror/mode/ruby/index.html @ 0:78edf6b517a0 draft
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| author | Coffee CMS <info@coffee-cms.ru> |
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| date | Fri, 11 Oct 2024 22:40:23 +0000 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/.cms/lib/codemirror/mode/ruby/index.html Fri Oct 11 22:40:23 2024 +0000 @@ -0,0 +1,183 @@ +<!doctype html> + +<title>CodeMirror: Ruby mode</title> +<meta charset="utf-8"/> +<link rel=stylesheet href="../../doc/docs.css"> + +<link rel="stylesheet" href="../../lib/codemirror.css"> +<script src="../../lib/codemirror.js"></script> +<script src="../../addon/edit/matchbrackets.js"></script> +<script src="ruby.js"></script> +<style> + .CodeMirror {border-top: 1px solid black; border-bottom: 1px solid black;} + .cm-s-default span.cm-arrow { color: red; } + </style> +<div id=nav> + <a href="https://codemirror.net/5"><h1>CodeMirror</h1><img id=logo src="../../doc/logo.png" alt=""></a> + + <ul> + <li><a href="../../index.html">Home</a> + <li><a href="../../doc/manual.html">Manual</a> + <li><a href="https://github.com/codemirror/codemirror5">Code</a> + </ul> + <ul> + <li><a href="../index.html">Language modes</a> + <li><a class=active href="#">Ruby</a> + </ul> +</div> + +<article> +<h2>Ruby mode</h2> +<form><textarea id="code" name="code"> +# Code from http://sandbox.mc.edu/~bennet/ruby/code/poly_rb.html +# +# This program evaluates polynomials. It first asks for the coefficients +# of a polynomial, which must be entered on one line, highest-order first. +# It then requests values of x and will compute the value of the poly for +# each x. It will repeatedly ask for x values, unless you the user enters +# a blank line. It that case, it will ask for another polynomial. If the +# user types quit for either input, the program immediately exits. +# + +# +# Function to evaluate a polynomial at x. The polynomial is given +# as a list of coefficients, from the greatest to the least. +def polyval(x, coef) + sum = 0 + coef = coef.clone # Don't want to destroy the original + while true + sum += coef.shift # Add and remove the next coef + break if coef.empty? # If no more, done entirely. + sum *= x # This happens the right number of times. + end + return sum +end + +# +# Function to read a line containing a list of integers and return +# them as an array of integers. If the string conversion fails, it +# throws TypeError. If the input line is the word 'quit', then it +# converts it to an end-of-file exception +def readints(prompt) + # Read a line + print prompt + line = readline.chomp + raise EOFError.new if line == 'quit' # You can also use a real EOF. + + # Go through each item on the line, converting each one and adding it + # to retval. + retval = [ ] + for str in line.split(/\s+/) + if str =~ /^\-?\d+$/ + retval.push(str.to_i) + else + raise TypeError.new + end + end + + return retval +end + +# +# Take a coeff and an exponent and return the string representation, ignoring +# the sign of the coefficient. +def term_to_str(coef, exp) + ret = "" + + # Show coeff, unless it's 1 or at the right + coef = coef.abs + ret = coef.to_s unless coef == 1 && exp > 0 + ret += "x" if exp > 0 # x if exponent not 0 + ret += "^" + exp.to_s if exp > 1 # ^exponent, if > 1. + + return ret +end + +# +# Create a string of the polynomial in sort-of-readable form. +def polystr(p) + # Get the exponent of first coefficient, plus 1. + exp = p.length + + # Assign exponents to each term, making pairs of coeff and exponent, + # Then get rid of the zero terms. + p = (p.map { |c| exp -= 1; [ c, exp ] }).select { |p| p[0] != 0 } + + # If there's nothing left, it's a zero + return "0" if p.empty? + + # *** Now p is a non-empty list of [ coef, exponent ] pairs. *** + + # Convert the first term, preceded by a "-" if it's negative. + result = (if p[0][0] < 0 then "-" else "" end) + term_to_str(*p[0]) + + # Convert the rest of the terms, in each case adding the appropriate + # + or - separating them. + for term in p[1...p.length] + # Add the separator then the rep. of the term. + result += (if term[0] < 0 then " - " else " + " end) + + term_to_str(*term) + end + + return result +end + +# +# Run until some kind of endfile. +begin + # Repeat until an exception or quit gets us out. + while true + # Read a poly until it works. An EOF will except out of the + # program. + print "\n" + begin + poly = readints("Enter a polynomial coefficients: ") + rescue TypeError + print "Try again.\n" + retry + end + break if poly.empty? + + # Read and evaluate x values until the user types a blank line. + # Again, an EOF will except out of the pgm. + while true + # Request an integer. + print "Enter x value or blank line: " + x = readline.chomp + break if x == '' + raise EOFError.new if x == 'quit' + + # If it looks bad, let's try again. + if x !~ /^\-?\d+$/ + print "That doesn't look like an integer. Please try again.\n" + next + end + + # Convert to an integer and print the result. + x = x.to_i + print "p(x) = ", polystr(poly), "\n" + print "p(", x, ") = ", polyval(x, poly), "\n" + end + end +rescue EOFError + print "\n=== EOF ===\n" +rescue Interrupt, SignalException + print "\n=== Interrupted ===\n" +else + print "--- Bye ---\n" +end +</textarea></form> + <script> + var editor = CodeMirror.fromTextArea(document.getElementById("code"), { + mode: "text/x-ruby", + matchBrackets: true, + indentUnit: 4 + }); + </script> + + <p><strong>MIME types defined:</strong> <code>text/x-ruby</code>.</p> + + <p>Development of the CodeMirror Ruby mode was kindly sponsored + by <a href="http://ubalo.com/">Ubalo</a>.</p> + + </article>