On 11/09/18 12:50, ToddAndMargo wrote:
> On 09/11/2018 03:09 AM, ToddAndMargo wrote:
>> multi method contains(Str:D: Cool:D $needle, Int(Cool:D) $pos)
>
> What the heck (not my exact word) is "multi method"?
>
> What is wrong with calling it a "function"?
Multi Methods are methods that do "multiple dispatch", which means more
or less "there are different candidates that can be called, and it
depends on the arguments you pass. They are matched against the
signatures of the candidates and the most appropriate one is called for
you".
Here's an example:
class TestClass {
multi method test-method(Str $input) {
say "this version of test-method is for strings";
}
multi method test-method(Int $input) {
say "this version of test-method is for integers"
}
}
my $tc = TestClass.new;
$tc.test-method("hello");
$tc.test-method(1234);
So you have the same name, but multiple candidates that have different
signatures.
Does that help?
- Timo
