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Comment by speg | Hacker News Reader

I feel bad, because as I was writing a solution to this I knew why it wouldn't work and why (returning my counter variable returns the value at the end of the count) but I still couldn't come up with a fix :(

Edit: A good Google seems to suggest using JSON.stringify and JSON.parse to copy the value.

Edit 2: But even that doesn't seem to work :(

Edit 3: Got it, using a generator function. Which makes sense. I guess I'm not an expert yet! :)

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Here's a solution using closure: http://codepen.io/anon/pen/KwmQam

Using a closure:

  function foo(s) {
    function generator(i) {
      return function () {
        return i;
      };
    }

    var r = new Array(s);
    
    for (var i = 0; i < s; i++) {
      r[i] = generator(i);
    }
    
    return r;
  }

  console.log(foo(1000)[42]());

Using Function.prototype.bind():

  function foo(s) {
    function generator(i) {
      return i;
    }

    var r = new Array(s);
    
    for (var i = 0; i < s; i++) {
      r[i] = generator.bind(window, i);
    }
    
    return r;
  }

  console.log(foo(1000)[42]());

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