Method: Proc#<<

Defined in:
proc.c

#<<(g) ⇒ Proc

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

f = proc {|x| x * x }
g = proc {|x| x + x }
p (f << g).call(2) #=> 16

See Proc#>> for detailed explanations.

Returns:



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# File 'proc.c', line 3366

static VALUE
proc_compose_to_left(VALUE self, VALUE g)
{
    return rb_proc_compose_to_left(self, to_callable(g));
}