CODEWITHSUNDEEP
javascriptfunction
tom harrison
tom harrison

Reputation: 3423

create function that will accept multiple arguments

I am trying to modify my function to accept a different number of arguments, so for example the arguments could be (poly1, poly2) or (poly1, poly2, poly3) and so on.

The problem I have is that I'm not sure how to increment the variable name

How can I turn the function below into a function that will accept a number of different arguments and loop through them. I would prefer a functional way to do this rather than using a for loop if possible

function UseWicketToGoFromGooglePolysToWKT(poly1, poly2, poly3, poly4) {
    var wicket = new Wkt.Wkt();

    wicket.fromObject(poly1);
    var wkt1 = wicket.write();

    wicket.fromObject(poly2);
    var wkt2 = wicket.write();

    wicket.fromObject(poly3);
    var wkt3 = wicket.write();

    wicket.fromObject(poly4);
    var wkt4 = wicket.write();

   return [wkt1, wkt2, wkt3, wkt4];
}

My attempt

function UseWicketToGoFromGooglePolysToWKT(...args) {
  args.map(item, i => {
    wicket.fromObject(`poly${i}`);
    var wkt + i = wicket.write();
  })

Upvotes: 1

Views: 65

Answers (1)

Cerbrus
Cerbrus

Reputation: 72857

You were close.
You just needed to return the result from .write(), and return the array resulting from .map().
You were also missing the new Wkt.Wkt(); call:

function UseWicketToGoFromGooglePolysToWKT(...args) {
  var wicket = new Wkt.Wkt(); // this was missing

  return args.map(item => {   // return this. Also, the `i` isn't necessary.
    wicket.fromObject(item);  // pass `item` here.
    return wicket.write();    // return instead of variable assignment
  });
}

Upvotes: 3

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