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Contents
require 'tins/memoize'
module Tins
module ProcPrelude
def apply(&my_proc)
my_proc or raise ArgumentError, 'a block argument is required'
lambda { |list| my_proc.call(*list) }
end
def map_apply(my_method, *args, &my_proc)
my_proc or raise ArgumentError, 'a block argument is required'
lambda { |x, y| my_proc.call(x, y.__send__(my_method, *args)) }
end
def call(obj, &my_proc)
my_proc or raise ArgumentError, 'a block argument is required'
obj.instance_eval(&my_proc)
end
def array
lambda { |*list| list }
end
memoize_function :array, :freeze => true
def first
lambda { |*list| list.first }
end
memoize_function :first, :freeze => true
alias head first
def second
lambda { |*list| list[1] }
end
memoize_function :second, :freeze => true
def tail
lambda { |*list| list[1..-1] }
end
memoize_function :tail, :freeze => true
def last
lambda { |*list| list.last }
end
memoize_function :last, :freeze => true
def rotate(n = 1)
lambda { |*list| list.rotate(n) }
end
alias swap rotate
def id1
lambda { |obj| obj }
end
memoize_function :id1, :freeze => true
def const(konst = nil, &my_proc)
konst ||= my_proc.call
lambda { |*_| konst }
end
def nth(n)
lambda { |*list| list[n] }
end
def from(&block)
my_method, binding = block.call, block.binding
my_self = eval 'self', binding
lambda { |*list| my_self.__send__(my_method, *list) }
end
end
end
Version data entries
51 entries across 49 versions & 7 rubygems