Class Proc
In: lib/core/facets/proc/bind.rb
lib/core/facets/proc/bind_to.rb
lib/core/facets/proc/compose.rb
lib/core/facets/proc/curry.rb
lib/core/facets/proc/partial.rb
lib/core/facets/proc/to_method.rb
lib/core/facets/proc/update.rb
Parent: Object

Methods

*   bind   bind_to   compose   curry   partial   to_method  

External Aliases

call -> update
  Use a Proc as an observable.

CREDIT: Tim Pease

Public Instance methods

Operator for Proc#compose and Integer#times_collect/of.

  a = lambda { |x| x + 4 }
  b = lambda { |y| y / 2 }

  (a * b).call(4)  #=> 6
  (b * a).call(4)  #=> 4

CREDIT: Dave

Bind a Proc to an object returning a Method.

NOTE: This version comes from Rails. The old Facets version used thread.rb, but I no longer think the implementaiton is thread critical. Please make a bug report if this proves wrong.

Bind a procedure to an object. This works wrapping instance_eval on the Proc object and then wrapping this in a new Proc.

   a = [1,2,3]
   p1 = Proc.new{ join(' ') }
   p2 = p1.bind_to(a)
   p2.call  #=> '1 2 3'

Returns a new proc that is the functional composition of two procs, in order.

  a = lambda { |x| x + 4 }
  b = lambda { |y| y / 2 }

  a.compose(b).call(4)  #=> 6
  b.compose(a).call(4)  #=> 4

CREDIT: Dave

Curry Proc object into new Proc object.

TODO: Utilize Ruby 1.9‘s curry method.

Convert a Proc object into new partial Proc object.

  a = proc { |a,b,c| a+b+c }
  b = a.partial(NA,2,NA)
  b[1,3] #=> 6

Note, the __ method, which used to be used in stay of NA, has been deprecated.

This method is similar to Proc#curry.

CREDT Trans

Convert Proc to method.

  object = Object.new

  function = lambda { |x| x + 1 }

  function.to_method(object, 'foo')

  object.foo(1)  #=> 2

[Validate]