NAME

Data::Util::Curry - Curries functions and methods

SYNOPSIS

use feature 'say';
use Data::Util qw(curry);

sub sum{
	my $total = 0;
	for my $x(@_){
		$total += $x;
	}
	return $total;
}

# placeholder "\0" indicates a subscript of the arguments
say curry(\&add, \0, 42)->(10); # 52

# placeholder "*_" indicates all the arguments
say curry(\&add, *_)->(1 .. 10); # 55

# two subscripts and the rest of the arguments
say curry(\&add, *_, \1, \0)->(1 .. 5); # 3 + 4 + 5 + 1 + 2

EXAMPLES

Currying Functions

curry(\&f, \0, 2)->(1); # f(1, 2)
curry(\&f, 3, \0)->(4); # f(3, 4)
curry(\&f, *_)->(5, 6); # f(5, 6)

curry(\&f, \0, \1, *_)->(1, 2, 3, 4); # f(1, 2, 3, 4)
curry(\&f, *_, \0, \1)->(1, 2, 3, 4); # f(3, 4, 1, 2)

Currying Methods

curry($obj, 'something', *_)->(1, 2);  # $obj->something(1, 2)

curry($obj, 'something',
	foo => \0,
	bar => \1)->(1, 2); # $obj->something(foo => 1, bar => 2)

curry(\0, 'something', \1)->($obj, 42);   # $obj->something(42)
curry($obj, \0, *_)->('something', 1, 2); # $obj->something(1, 2)

Argument Semantics

sub incr{ $_[0]++ }

my $i = 0;
curry(\&incr, \0)->($i); # $i++
curry(\&incr, *_)->($i); # $i++
curry(\&incr, $i)->();   # $i++

SEE ALSO

Data::Util.