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Contents
module Kernel
unless method_defined?(:tap) # 1.8.7+
# The tap K-Combinator. This yields self -and- returns self.
#
# Note, Ruby 1.9+ does not appear to support the zero arity
# instance_eval option.
#
def tap(&b)
if block_given?
b.arity == 1 ? yield(self) : instance_eval(&b)
end
self
end
# == Future definition?
#
# This is a consideration for a future #tap using Functor:
#
# require 'facets/functor'
#
# def tap(&b)
# if block_given?
# b.arity == 1 ? yield(self) : instance_eval(&b)
# self
# else
# Functor.new{ |op, *args| self.send(op, *args); self }
# end
# end
#
# It would allow a single call, before returning the original.
# However there are not very many useful things you can do with
# that.
end
end
Version data entries
6 entries across 6 versions & 1 rubygems