Archive for October, 2010

Javascript Array Detection

by on Oct.06, 2010, under Javascript, Software Development

Turns out the most reliable way to detect an Array is not to use the old standby:

return (typeof foo === ‘object’ && foo.constructor === Array)

but rather to do this:

function isArray(anArray) {
  return Object.prototype.toString.apply(anArray) === "[object Array]";

I have to give credit to my friend Doug Crockford, for this.

I recommend his book Javascript: The Good Parts

shannon norrell

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A few highly recommended websites...

  • A List Apart
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  • Javascript: The Good Parts
  • QuirksMode.org