Sha256: aaae8887372af1a554fb45ca259155fd2db4a78d42e59acd9b812c5f13aff69e
Contents?: true
Size: 693 Bytes
Versions: 7
Compression:
Stored size: 693 Bytes
Contents
require 'facets/functor'
module Kernel
# Yield self -or- return self.
#
# "a".ergo.upcase #=> "A"
# nil.ergo.foobar #=> nil
#
# "a".ergo{ |o| o.upcase } #=> "A"
# nil.ergo{ |o| o.foobar } #=> nil
#
# This is like #tap, but tap yields self -and- returns self.
#
# CREDIT: Daniel DeLorme
def ergo &b
if block_given?
b.arity == 1 ? yield(self) : instance_eval(&b)
else
self
end
end
end
class NilClass
# Compliments Kernel#ergo.
#
# "a".ergo{ |o| o.upcase } #=> "A"
# nil.ergo{ |o| o.bar } #=> nil
#
# CREDIT: Daniel DeLorme
def ergo
@_ergo ||= Functor.new{ nil }
@_ergo unless block_given?
end
end
Version data entries
7 entries across 7 versions & 2 rubygems