Combinations

Sometimes we allow function to accept different sequences of types. Let’s take an example:
function andLogAndFinish( spec, tracker, done ) {
  validate( "SOF|SZF|OOF|OZF", [ spec, tracker, done ] )
  //...
}
Where the following sequences of types valid:
string, object, function
string, null, function
object, object, function
object, null, function
import { validateCombo } from "bycontract";
​
const CASE1 = [ "string", TRACKER_OPTIONS, "function" ],
      CASE2 = [ "string", null, "function" ],
      CASE3 = [ SPEC_OPTIONS, TRACKER_OPTIONS, "function" ],
      CASE4 = [ SPEC_OPTIONS, null, "function" ];
​
validateCombo( arguments, [ CASE1, CASE2, CASE3, CASE4 ] );
Function validateCombo throws exception when none of the cases is valid
Custom Types
Validation Exceptions
Last modified 3yr ago