Calling an Array of Functions in JavaScript

http://zpao.com/posts/calling-an-array-of-functions-in-javascript/

by luu • 12 years ago

44 10 12 years ago

serve_yay2• 12 years ago

Maybe it's just me but this strikes me as a great argument for leaving it like it is:

    callbacks.forEach(function(callback) {
      callback();
    });

Everybody knows what it does. Simple.

grimtrigger• 12 years ago

I think the author comes to that conclusion, the article is just a thought experiment

serve_yay2• 12 years ago

Sure, I'm just making the point that sometimes when you look at something like that and think it can be improved, it's worth considering that the cure may end up being worse than the disease.

brbcoding• 12 years ago

It also seems to be a bit more performant than some of the other methods (like `.shift()()` or `.call`). http://jsfiddle.net/brbcoding/hyw6a9kw/3/

nine_k• 12 years ago

The article laboriously avoids the words 'applicative functor' :)

A good abstraction does make the life easier time and again:

    > import Control.Applicative
    > [(+1), (+20), (*10)] <*> [5]
    [6,25,50]
    > _

lightblade• 12 years ago

Is this better?

_.invoke(callbacks, 'call')

Short and concise, but needs underscore dependency.

lrichardson• 12 years ago

Obviously, doing this is not super-readable, but it can be fun thought-experiments or brain-teasers.

There was a post I wrote about doing something similar a little while back [1]

  [1]: http://tech.pro/blog/2097/clever-way-to-demethodize-native-js-methods

nadocrew• 12 years ago

    callbacks.forEach(Function.prototype.call.bind(Function.prototype.call));

It is just as long as the original and more convoluted, but much more fun.

Calling an Array of Functions in JavaScript

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