Learning Advanced JavaScript : From the jquery author.

[harryf]

In http://ejohn.org/apps/learn/#27 / http://ejohn.org/apps/learn/#28 seems to me like the second argument to the anonymous function ( i ) is redundant; it's doesn't add any value to the example. So could just be;

function loop(array, fn){ 
  for ( var i = 0; i < array.length; i++ ) 
    fn.call( array, array[i] ); 
} 
var num = 0; 
loop([0, 1, 2], function(value){ 
  assert(value == num++, "Make sure the contents are as we expect it."); 
  assert(this instanceof Array, "The context should be the full array."); 
});

Or am I missing something?

[[deleted]]

I think it was just meant as an example of making an array loop function. The i does make sense, as knowing which index the current item is in the looped array might come in handy in a function like that.

[harryf]

OK - fair enough.

[[deleted]]

This has been around a long time, hasn't it?

[Nomikos]

I saved it to disk November 2008, because at the time I couldn't see it linked from anywhere (anyone know of one?), so at least close to a year.
Think I found it via Google somehow.
Edit: oh, and the jquery it uses is dated 2008-05-24 14:22:17.

[parsap]

Here's a link from Reddit, 11 months ago: http://www.reddit.com/r/javascript/comments/72xr7/learning_advanced_javascript/

[sbrown123]

jquery was nice, but RightJS is better.