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is it an array?

/ Published in: JavaScript
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Cribbed from Crockford's "JavaScript: The good parts."

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  1. var isArray = function(value) {
  2.     return value &&
  3.         typeof value === 'object' &&
  4.         typeof value.length === 'number' &&
  5.         typeof value.splice === 'function' &&
  6.         !(value.propertyIsEnumerable('length'));
  7. };

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