Unknown JavaScript syntax when defining an object

Question

I came across some JavaScript syntax I haven't seen before. Can someone help point me in the right direction, I'm not even sure what I could google to learn more :/

$.variable = function() {
  return a(b, [{
    key: "setPeriod",
    value: function(t) {
      this.variable.period = t;
    }
  }, {
    key: "location",
    get: function() {
      return "earth";
    }
  }])
}

$.variable.setPeriod("test");
$.variable.location;

My question is what is this structure where an object is defined via a list. Also not sure what the difference between value and get is. Any help would be appreciated.

Here's an example of a snippet:
https://pastebin.com/zymW2XZw

Looks like a pair of brackets - () - is missing. Did you copy-paste ? — user1636522
– user1636522, Commented Dec 9, 2017 at 5:23
By the way could you include the definition of a and b please ? — user1636522
– user1636522, Commented Dec 9, 2017 at 5:28
It's not a copy/paste, i tried to show a simplified version of what was going on. I've included a snippet of the code I was looking at in the original question. — Rawr
– Rawr, Commented Dec 9, 2017 at 5:30
On line 13 you can seen the return statement which returns the output of the function s which includes an array of objects all of which include the key and value fields. — Rawr
– Rawr, Commented Dec 9, 2017 at 5:33

score 1 · Accepted Answer · 2017-12-09 06:11:50Z

1

Here my guess about what happens to this list of objects :

var o = s([{
  key: "attribute",
  value: "default"
}, {
  key: "getAttribute",
  value: function () {
    return this.attribute;
  }
}, {
  key: "setAttribute",
  value: function (value) {
    this.attribute = value;
  }
}]);

console.log(o.getAttribute());
o.setAttribute("custom");
console.log(o.getAttribute());

function s (members) {
  var o = {};
  members.forEach(function (member) {
    o[member.key] = member.value;
  });
  return o;
}

I guess the framework needs to preprocess the object's members for some obscure reasons related to the framework internal mecanism.

edited Dec 9, 2017 at 6:11

answered Dec 9, 2017 at 6:06

user1636522

Sign up to request clarification or add additional context in comments.

2 Comments

Rawr Over a year ago

Hey @leaf thanks for the patience. This question was kind of a shot in the dark. I was hoping someone would recognize what's going on here and shed some light on it. It's difficult to find the functions that are doing the transformations because it was minified and all the functions and variables were renamed and were often reused depending on the context. I appreciate the guess. Especially because it works, I'm accepting this answer. Thanks again.

user1636522 Over a year ago

You're welcome @Rawr, ask if you have more questions :-)

Collectives™ on Stack Overflow

Unknown JavaScript syntax when defining an object

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related