Printing/Logging Set

Question

In all the examples of new Set it shows how to convert array to set, add to set, etc and then shows what to expect when using console.log . Is there a difference with Google Apps Script? Seems so simple, not sure what Im missing?

function myFunction() {
  let arr = ["one", "two", "three"]
  let setTest = new Set(arr)
  Logger.log(setTest)
  // Output: 
//Info  {}
}

The following example shows how to create a new Set from an array.

let chars = new Set(['a', 'a', 'b', 'c', 'c']);

All elements in the set must be unique therefore the chars only contains 3 distinct elements a, b and c.

console.log(chars);

Output:

Set { 'a', 'b', 'c' }

what if you do `Logger.log(JSON.stringify(setTest))` ? maybe it's the toString version of the Set which has a problem — ValLeNain, Oct 27 '22 at 15:24
If you want to print a set, you need to spread the values into an array and convert it to JSON. This might help: https://stackoverflow.com/a/73989963/1762224 — Mr. Polywhirl, Oct 27 '22 at 15:26
also, you have the `size` attribute that you can print on a Set to see how many elements are in there. — ValLeNain, Oct 27 '22 at 15:32
I don't understand your question `setTest` is a Set object. What do you want to do with `setTest`? — TheWizEd, Oct 27 '22 at 15:49
@Mr.Polywhirl from Array is how I have been viewing, Im just curious why alot of the examples and training show you should be able to console.log the Set. Trying to understand — Mr. Anderson, Oct 27 '22 at 16:00
@TheWizEd Just learning about Set and arrays. From all the training and documentation it shows you can just print the Set contents. I was adding and deleting things so just as I go along I wanted to check what was it contained, etc — Mr. Anderson, Oct 27 '22 at 16:02
Still not understanding your question. The Set object has a `toString()` method that is called by default if you want to display the object. For Chrome it will appear as an object `{ 'a', 'b', 'c' }` . See [Set Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set) — TheWizEd, Oct 27 '22 at 16:12
@TheWizEd If I try to display, I get `{}` Im trying to do the same in the link you posted as `console.log(mySet1) // logs Set(5) [ 1, "some text", {…}, {…}, 5 ] in Firefox // logs Set(5) { 1, "some text", {…}, {…}, 5 } in Chrome` — Mr. Anderson, Oct 27 '22 at 16:19

score 1 · Answer 1 · answered Oct 27 '22 at 17:53

function myFunction() {
  let arr = ["one", "two", "three"]
  let s = new Set(arr);
  let it = s.values;
  Logger.log([...s])
}

Execution log
11:52:44 AM Notice  Execution started
11:52:45 AM Info    [one, two, three]
11:52:46 AM Notice  Execution completed

Printing/Logging Set

1 Answers1