Class: Symbol

Inherits:

Object

• Object
• Symbol

Defined in:

lib/patch/foobar.rb

Overview

Extends the Symbol class for functional programming patterns.

Instance Method Summary

• #with(*args, &block) ⇒ Proc

  Creates a Proc that functions as a curried instance method for objects It is possible to supply a block (to the instance method) for later use.

Instance Method Details

#with(*args, &block) ⇒ Proc

Creates a Proc that functions as a curried instance method for objects It is possible to supply a block (to the instance method) for later use. This method allows for partial application of instance methods.

Examples:

plus_2 = :+.with(2)
plus_2.call(5) # => 7

mapper = :map.with { |x| x * x }
data = [1, 2, 3]
mapper.call(data) # => [1, 4, 9]

# Combining with map
[1, 2, 3].map(&:+.with(10)) # => [11, 12, 13]

Parameters:

• `args` (Array<Object>) —

  Arguments to be pre-supplied to the method.

• `block` (Proc) —

  A block to be pre-supplied to the method.

Returns:

• (Proc) —

  A lambda that expects a receiver object and any further arguments.

# File 'lib/patch/foobar.rb', line 315

def with(*args, &block)
  ->(o, *more) { o.send(self, *args, *more, &block) }
end