Sha256: 0a18c22774e933680e1d89558d3741aba74b2b007af3775416d07208bfd42d63
Contents?: true
Size: 829 Bytes
Versions: 15
Compression:
Stored size: 829 Bytes
Contents
module Spruz
module PartialApplication
# If this module is included into a Proc (or similar object), it tampers
# with its Proc#arity method.
def self.included(modul)
modul.module_eval do
old_arity = instance_method(:arity)
define_method(:arity) do
@__arity__ or old_arity.bind(self).call
end
end
super
end
# Create a partial application of this Proc (or similar object) using
# _args_ as the already applied arguments.
def partial(*args)
if args.empty?
dup
elsif args.size > arity
raise ArgumentError, "wrong number of arguments (#{args.size} for #{arity})"
else
f = lambda { |*b| call(*(args + b)) }
f.instance_variable_set :@__arity__, arity - args.size
f
end
end
end
end
Version data entries
15 entries across 15 versions & 1 rubygems