Created
February 22, 2014 00:20
-
-
Save srawlins/9146528 to your computer and use it in GitHub Desktop.
flexible curry for Procs and methods in Ruby
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
def curry(prc, *args) | |
Proc.new { |*remaining| prc.call(*args.map { |arg| arg || remaining.shift }) } | |
end | |
def curry_m(m, n, *args) | |
define_method(m, curry(method(n), *args)) | |
end | |
power = ->(a,b){ "#{a}**#{b} is #{a**b}" } | |
square = curry power, nil, 2 | |
pow2 = curry power, 2, nil | |
puts "3 squared is #{square.call(3)}" #=> 3 squared is 3**2 is 9 | |
puts "two to the 3 is #{pow2.call(3)}" #=> two to the 3 is 2**3 is 8 | |
list = ->(a,b,c,d) { "#{a}, #{b}, #{c}, #{d}" } | |
static_a = curry list, :hi, nil, nil, nil | |
static_b_c = curry list, nil, :sam, :adam, nil | |
puts "static_a: #{static_a.call(:b, :c, :d)}" #=> static_a: hi, b, c, d | |
puts "static_b_c: #{static_b_c.call(:a, :d)}" #=> static_b_c: a, sam, adam, d | |
def power_m(a,b); a**b; end | |
curry_m(:square_m, :power_m, nil, 2) | |
curry_m(:pow2_m, :power_m, 2, nil) | |
puts "3 squared is #{square_m(3)}" #=> 3 squared is 9 | |
puts "two to the 3 is #{pow2_m(3)}" #=> two to the 3 is 8 |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment