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Contents
require 'facet/array/at_rand'
require 'facet/string/self/patterns'
require 'facet/string/shatter'
class String
# Return a random separation of the string.
# Default separation is by charaacter.
#
# "Ruby rules".at_rand(' ') #=> ["Ruby"]
#
def at_rand( separator=// )
separator = self.class.patterns( separator )
self.split(separator,-1).at_rand
end
# Return a random separation while removing it
# from the string. Default separation is by character.
#
# s = "Ruby rules"
# s = at_rand!(' ') #=> "Ruby"
# s #=> "rules"
#
def at_rand!( separator=// )
separator = self.class.patterns( separator )
a = self.shatter( separator )
w = []; a.each_with_index { |s,i| i % 2 == 0 ? w << s : w.last << s }
i = rand( w.size )
r = w.delete_at( i )
self.replace( w.join('') )
return r
end
end
# _____ _
# |_ _|__ ___| |_
# | |/ _ \/ __| __|
# | | __/\__ \ |_
# |_|\___||___/\__|
#
=begin test
require 'test/unit'
class TCString < Test::Unit::TestCase
def test_at_rand
a = '12345'
20.times{ assert_nothing_raised{ a.at_rand } }
20.times{ assert( a.include?( a.at_rand ) ) }
end
def test_at_rand!
x = 'ab'
r = x.at_rand!
assert( r == 'a' || r == 'b' )
assert( x == 'a' || x == 'b' )
end
end
=end
Version data entries
22 entries across 22 versions & 1 rubygems