Ruby Tips - Revision history

Brianegge at 23:12, 10 December 2011

2011-12-10T23:12:37Z

← Older revision		Revision as of 23:12, 10 December 2011
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	The same technique to shuffle an array of numbers can be used to shuffle words. This is great if you want to scramble words, as in creating anagram puzzles.		The same technique to shuffle an array of numbers can be used to shuffle words. This is great if you want to scramble words, as in creating anagram puzzles.

	<~~geshi~~ lang="ruby">		<syntaxhighlight lang="ruby">
	'anagram'.split(//).shuffle.join		'anagram'.split(//).shuffle.join
	=> "gnaarma"		=> "gnaarma"
	</~~geshi~~>		</syntaxhighlight>

	== Shuffle a list of numbers ==		== Shuffle a list of numbers ==

2009-10-09T06:49:05Z

← Older revision		Revision as of 06:49, 9 October 2009
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	$ ruby setup.rb		$ ruby setup.rb
	</geshi>		</geshi>

	~~== [[Ruby Yaml to Enum]] ==~~

	~~Generate Java 1.5 enums from a YAML file~~

	== [[Ruby detab]] ==		== [[Ruby detab]] ==

2009-05-15T13:54:45Z

Shuffle a list of numbers

2008-09-29T07:23:32Z

@@ Line 1: / Line 1: @@
 == Shuffle a list of numbers ==
@@ Line 4: / Line 13: @@
 (1..14).to_a.sort { rand }
 => [14, 8, 1, 9, 3, 10, 5, 11, 7, 12, 4, 13, 2, 6]
 </geshi>

2008-07-31T00:41:21Z

2008-07-31T00:32:15Z

2008-07-20T05:40:17Z

2008-05-14T07:03:48Z

← Older revision		Revision as of 07:03, 14 May 2008
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			== Rename files ==

			<geshi lang="bash">
			for f in `ls`; do mv -u $f $(ruby -e "puts '$f'.gsub('14','13')"); done
			</geshi>

	== Check CLASSPATH ==		== Check CLASSPATH ==

2007-09-27T05:25:39Z

← Older revision		Revision as of 05:25, 27 September 2007
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			== Check CLASSPATH ==

			<geshi lang="ruby">
			#!/bin/env ruby
			#
			# Checks to make sure all the entries on the classpath are valid

			# We only want to emit color codes if we're outputting to a terminal. If this is getting piped into grep or less, we'll ignore these
			red=STDOUT.isatty ? "\e[1;31m" :""
			normal=STDOUT.isatty ? "\e[0;0m" : ""

			cp = ENV['CLASSPATH']

			if cp == nil then
			STDERR.puts "No CLASSPATH set"
			exit 1
			else
			# We'll assume a Windows CP. We could do something ticky, but we have to be very tricky, because we're probably in Cygwin
			cp.split(';').each do \|file\|
			if !File.readable?(file) then
			STDERR.puts "Warning: Classpath file #{red}#{file}#{normal} can't be read"
			end
			end
			end
			</geshi>

	== nextPrime ==		== nextPrime ==

2007-09-24T03:15:27Z

← Older revision		Revision as of 03:15, 24 September 2007
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			== nextPrime ==

			Short script to return the next prime number.
			<geshi lang="ruby">
			#!/bin/env ruby

			def isPrime(n)
			prime = true
			3.step(Math::sqrt(n), 2) do \|i\|
			if (n % i == 0) then
			prime = false
			break
			end
			end
			if (( n%2 !=0 && prime && n > 2) \|\| n == 2) then
			return true
			else
			return false
			end
			end

			i = ARGV[0].to_i

			while !isPrime(i)
			i += 1
			end

			puts i
			</geshi>

	== [[Colorize Glimpse]] ==		== [[Colorize Glimpse]] ==