Sha256: 98b05135df77119df931bb6cf4fbb13f3cc0f9405a998ccfcb3a36655ff3a951
Contents?: true
Size: 932 Bytes
Versions: 26
Compression:
Stored size: 932 Bytes
Contents
class Array
# Return a random element of the array.
#
# [1, 2, 3, 4].at_rand #=> 2
# [1, 2, 3, 4].at_rand #=> 4
#
def at_rand
self.at( rand( size ) )
end
# Same as #at_rand, but acts in place removing a
# random element from the array.
#
# a = [1,2,3,4]
# a.at_rand! #=> 2
# a #=> [1,3,4]
#
def at_rand!
return delete_at( Kernel.rand( size ) )
end
end
# _____ _
# |_ _|__ ___| |_
# | |/ _ \/ __| __|
# | | __/\__ \ |_
# |_|\___||___/\__|
#
=begin test
require 'test/unit'
class TCArray < Test::Unit::TestCase
def test_at_rand
a = [1,2,3,4,5]
20.times{ assert_nothing_raised{ a.at_rand } }
20.times{ assert( a.include?( a.at_rand ) ) }
end
def test_at_rand!
a = ['a','b','c']
assert_equal( 1, a.at_rand!.length )
assert_equal( 2, a.length )
end
end
=end
Version data entries
26 entries across 26 versions & 1 rubygems