Module: Bluepine::Functions

Included in:
Attributes::Visitor, Validator
Defined in:
lib/bluepine/functions.rb

Overview

FP helpers

Defined Under Namespace

Classes: Result

Instance Method Summary collapse

Instance Method Details

#compose(*fns) ⇒ Object

Compose functions compose : (a -> b) -> (b -> c) -> a -> c



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# File 'lib/bluepine/functions.rb', line 25

def compose(*fns)
  ->(v) {
    fns.reduce(fns.shift.(v)) do |x, f|
      x.respond_to?(:compose) ? x.compose(f) : f.(x)
    end
  }
end

#compose_result(*fns) ⇒ Object

A composition that early returns value f : a -> b g : a -> c



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# File 'lib/bluepine/functions.rb', line 36

def compose_result(*fns)
  ->(v) {
    fns.reduce(fns.shift.(v)) do |x, f|
      x ? x : f.(v)
    end
  }
end

#curry(method, *args) ⇒ Object

Curry instance method



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# File 'lib/bluepine/functions.rb', line 45

def curry(method, *args)
  self.method(method).curry[*args]
end

#result(value, errors = nil) ⇒ Object 



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# File 'lib/bluepine/functions.rb', line 19

def result(value, errors = nil)
  Result.new(value, errors)
end