Class: Method

Inherits:
Object
  • Object
show all
Defined in:
mrbgems/mruby-method/mrblib/method.rb

Instance Method Summary collapse

Instance Method Details

#<<(other) ⇒ Object

call-seq:

meth << other_proc -> proc

Returns a proc that is the composition of this method and the given other_proc. The returned proc takes a variable number of arguments, calls other_proc with them then calls this method with the result.

def f(x)
x * x
end

def g(x)
x + x
end

# (f << g).call(2) == f(g(2)) == f(4) == 16
p (method(:f) << method(:g)).call(2)  #=> 16


47
48
49
 
# File 'mrbgems/mruby-method/mrblib/method.rb', line 47

def <<(other)
  ->(*args, **opts, &block) { call(other.call(*args, **opts, &block)) }
end

#>>(other) ⇒ Object

call-seq:

meth >> other_proc -> proc

Returns a proc that is the composition of this method and the given other_proc. The returned proc takes a variable number of arguments, calls this method with them then calls other_proc with the result.

def f(x)
x * x
end

def g(x)
x + x
end

# (f >> g).call(2) == g(f(2)) == g(4) == 8
p (method(:f) >> method(:g)).call(2)  #=> 8


70
71
72
 
# File 'mrbgems/mruby-method/mrblib/method.rb', line 70

def >>(other)
  ->(*args, **opts, &block) { other.call(call(*args, **opts, &block)) }
end

#to_proc ⇒ Object

call-seq:

meth.to_proc -> proc

Returns a Proc object corresponding to this method.

class Foo
def bar
  "baz"
end
end

m = Foo.new.method(:bar)
p = m.to_proc
p.call  #=> "baz"

# Can be used with &:
%w[hello world].map(&:upcase)  #=> ["HELLO", "WORLD"]


21
22
23
24
25
26
 
# File 'mrbgems/mruby-method/mrblib/method.rb', line 21

def to_proc
  m = self
  lambda {|*args, **opts, &b|
    m.call(*args, **opts, &b)
  }
end