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  1. Stupid JavaScript Tricks

    > bar = ['width', 'height']
    [ 'width', 'height' ]
    > bar
    [ 'width', 'height' ]  // Nothing up my sleeve
    > bar.indexOf['length']
    1  // Presto!
    

    In case you haven't guessed what's up here: JavaScript automatically surfaces a value called 'length' in all arrays. So you can get the length of bar by typing bar.length and ...

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