External module "utils/try-then/docs/types/index.d"

Export assignment trythen

• trythen<T, U>(x: () => T, y: ErrorHandler<U>): T | U

• If a function does not throw, returns the function return value; otherwise, returns the return value of a second function y.

  Notes

  • The function y is provided a single argument:

    • error: the error thrown by x

  Type parameters

  • T

  • U

  Parameters

  • x: () => T

    function to try invoking

    • • (): T

      • Returns T

  • y: ErrorHandler<U>

    function to invoke if a function throws

  Returns T | U

  the return value of either x or y

  Example

  var randu = require( '@stdlib/random/base/randu' );
  
  function x() {
      if ( randu() < 0.5 ) {
          throw new Error( 'beep' );
      }
      return 1.0;
  }
  
  function y() {
      return randu();
  }
  
  var z = trythen( x, y );
  // returns <number>