In other languages, when calling functions you could choose what parameters to pass with.
So for example
int cookMeth(x=0,y=0,z=0){...}
cookMeth(z=123);
My question is, is it possible for js? It doesn't seem to be but what are the alternatives or techniques for doing this?
No, it isn't.
All arguments are optional, but you can't skip arguments.
You can:
Explicitly pass values to be ignored
exampleFunction(undefined, undefined, 123);
Pass an object instead
function exampleFunction(args) {
var x = args.x, y = args.y, z = args.z;
}
exampleFunction({ z: 123 });
What you could do is use an object in the following way:
Method({ param : 1, otherParam : "data"});
function Method(options){
var variable = options.param;
}
Quentin has already replied to your question, I want just to add, that sometimes, you could rely on arguments types, and in that way to distinguish them, but there are more work to do:
function some(){
var name,
birth;
if (typeof arguments[0] === 'string') {
name = arguments[0];
birth = arguments[1] || new Date();
} else{
name = 'Anonym';
birth = arguments[0];
}
// ...
}
some('foo', new Date(1500, 1, 1));
some(new Date(1500, 1, 1));
