Sha256: ac4345246ec78ad93ff117e510e03ca873fdff50856358050ee678c99c25705c
Contents?: true
Size: 698 Bytes
Versions: 26
Compression:
Stored size: 698 Bytes
Contents
class Hash
# Returns true if the hash contains
# _only_ the given keys, otherwise false.
#
# h = { :a => 1, :b => 2 }
# h.has_only_keys?( :a, :b ) #=> true
# h.has_only_keys?( :a ) #=> false
#
def has_only_keys?(*check_keys)
unknown_keys = self.keys - check_keys
return unknown_keys.empty?
end
end
# _____ _
# |_ _|__ ___| |_
# | |/ _ \/ __| __|
# | | __/\__ \ |_
# |_|\___||___/\__|
#
=begin test
require 'test/unit'
class TCHash < Test::Unit::TestCase
def test_has_only_keys?
assert( { :a=>1,:b=>2,:c=>3 }.has_only_keys?(:a,:b,:c) )
assert( ! { :a=>1,:b=>2,:c=>3 }.has_only_keys?(:a,:b) )
end
end
=end
Version data entries
26 entries across 26 versions & 1 rubygems