Sha256: d780c9c556f234bf3be91905101d791eeb0b0c29df4ace13773b8f45a79ef385
Contents?: true
Size: 748 Bytes
Versions: 7
Compression:
Stored size: 748 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,
# where as #ergo yields self buit return the result.
#
# 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 6 versions & 1 rubygems