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

DESCRIPTION

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++