Fastest way to find item in array/object

Question

What's the fastest way to find the index of an item in a list or object in Javascript / AS3? I'm asking this for both because the syntax is similar for both these languages. Assuming: ``` myArray = ["one", "two", "three"]; myObject = {one:1, two:2, three:3}; ``` Which is the fastest and in which case would you want it or not? - Array.indexOf(x) - myObject[x] != null - x in myObject - something else?

Accepted Answer

Using an object doesn't sound like a good idea, as re-indexing will be a heavy operation and will wipe out the access performance gains if any. Array.indexOf(x) seems to be the way to go.

Fastest way to find item in array/object

Solution

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