Map, Reduce and functional scripting

[jacoba17670583]

Hi all,

I've been writing scripts and was refactoring some code to utilize functional methods like (map, reduce, filter).

It appears that these are completely unsupported. Is this true? I couldn't find any confirmation either way, only that they appear not to work. I can't imagine why this would be the case.

Here is a trivial example of a script that fails to run:

var x = [4,9,16];
var y = x.map(Math.sqrt);
alert(y);

I get the following error: "x.map is not a function".

Best wishes,

Jake

[jacoba17670583]

I'd still like some formal clarification, but adding my own Array.prototype.map definition "solved" the problem.

Is Adobe just running an ancient javascript engine?

[O2 Creative NZ · Accepted solution]

Its called Extendscript  (see ExtendScript - Wikipedia ) based on ECMA 3 AKA Javascipt 1999. Some methods you are used to may also work differently. If you install ExtendScript Toolkit, run it and then select HELP > Object Model Viewer you can browse all the built in Objects and see their methods/props etc.

It works, just no modern features. Polyfills from MDN help some.

[David26533675shol]

Hi,

It works, just no modern features. Polyfills from MDN help some.

By @O2 Creative NZ

I'm working with Babel, a polyfill transcriptor, and specifying "ie 6" (2001 browser) in "target" browser. Giving this snippet of code : 

thing= [1, 2, 3]
thing.map((x)=>x+2)

does indeed give me this.

truc = [1, 2, 3];
truc.map(function (x) {
  return x + 2;
});

These two snippets work in browser console, but I still get the same error as OP in Premiere Pro.
ExtendScript should have the map function if it were based on ECMA 3 right ?
Indeed, my source code comes from https://youtu.be/esBhotDXQg0?si=fl_uY2Xp-g42rKJ8s which is using map (see 4:18), scripts that works in his Premiere Pro (see 13:35), 4 years ago.

So no, I wouldn't say "it works" since it seems broken now, nor I would say that "map()", a 1999 function is a "modern feature"... 😅

How could I make it work for ExtendScript ?