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jperrine/gist:3442448

Created August 23, 2012 21:56
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gistfile1.js
array = [1,2,4,3]
// => [1, 2, 4, 3]
array[6]
// => undefined
array[6] !== undefined
// => false
array[1] !== undefined
// => true
array[1] = false
// => false
array[1] !== undefined
// => true
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