Name

SPVM::Comparator::String - Interface Type for String Comparation Callback

Synopsys

  use Comparator::String;
  
  my $comparator = (Comparator::String)method : int ($a : string, $b : string); {
    return $a cmp $b;
  };
  
  my $result = $comparator->(3, 5);

Description

Comparator::String is the interface type for the string comparation callback.

Interface Methods

  required method : int ($a : string, $b : string);

This method must receive two values that types are string and return the following value.

If the first argument is greater than the second argument, returns 1. If the first argument is lower than the second argument, returns -1. If the first argument is equal to the second argument, returns 0.