CODEWITHSUNDEEP
javascript
David Christo
David Christo

Reputation: 876

What does var i$0 mean in javascript?

I'm looking at a javascript file someone else wrote, and I see a loop that does this:

for (var i$0 = 0; i$0 < strings.length; ++i$0)
{
  var id$1 = strings[i$0][0];
  var data = strings[i$0][1];
  // ... blah
}

Since I am not super familiar with every feature javascript has to offer, what do i$0 and id$1 mean? Do they create a variable name based on input/command line parameters or do they do something else entirely?

Upvotes: 0

Views: 479

Answers (1)

Nelson Teixeira
Nelson Teixeira

Reputation: 6572

$ is a valid character in a variable name. So they are normal variables.

By convention they are most used to refer to a jQuery object as this library's functions traditionally use $('something'). So it's natural that a jQuery object be assigned to:

var $button = $('#btn');

and because jQuery it's a very popular library, some people discourage it's use otherwise so not to confuse with it.

But you are free to use them as you see fit.

Upvotes: 2

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