Module function/comparator

comparator

• comparator<T>(pred: Pred2<T, T>): (x: T, y: T) => 0 | 1 | -1

• Makes a comparator function out of a function that reports whether the first element is less than the second.

  example

   var byAge = comparator((a, b) => a.age < b.age);
   var people = [
     // ...
   ];
   var peopleByIncreasingAge = sort(byAge, people);
  

  Type parameters

  • T

  Parameters

  • pred: Pred2<T, T>

    A predicate function of arity two which will return true if the first argument is less than the second, false otherwise

  Returns (x: T, y: T) => 0 | 1 | -1

  A Function :: a -> b -> Int that returns -1 if a < b, 1 if b < a, otherwise 0

  • • (x: T, y: T): 0 | 1 | -1

    • Parameters

      • x: T

      • y: T

      Returns 0 | 1 | -1