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subimage/fuck_yourself_in_ie.js

Created June 28, 2012 20:48
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How you can totally fuck yourself with JavaScript in IE.
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fuck_yourself_in_ie.js
// Inline assignment inside an 'if' statement works with most programming languages.
// However, in JavaScript there's a gotcha.
// This works in Safari, Firefox & Chrome...but will destroy your life in IE.
if(thing=functionThatReturnsThing()) {
doStuff();
}
// Do this instead
var thing=functionThatReturnsThing();
if(thing) doStuff();
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Adding on...it seems this pops up reliably in IE when using the .each function of prototype or jquery

    item_cids.each(function(cid, i){
      var item = _App.models.items.getByCid(cid);
      if(item) {
        item.set({rank: i}, {silent: true});
      }
    });

IE will complain about 'set' not being available if you try to assign item inline with the if statement.

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