For loops question about javascript-patterns HOT 5 CLOSED

Agreed with this, seems you are relying on 2 types of trickiness for the i-- examples: 0 being falsy, and i-- returning the value of i before the decrement operation.

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@DjebbZ @Feodoric problem is, if you try i = i -1 or i -= 1 with an array, it will not return the first item in the array.

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I understand. In the last loop iteration, after i-- is evaluated, i equals 0, which is falsy. Can you confirm ?

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Typically, I don't even do i--, I do --i instead
Crockford roughly went through the reason with "++" in http://www.youtube.com/watch?v=taaEzHI9xyY&t=50m42s

What makes "++" a special case is that "+" is also used for string concatenation, so I suppose it is easier to make mistake. Coming from C++ world, I don't see it as a big deal. However, both Crockford and I would agree that ++i and --i are not the same as i++ and i-- (the former usage is preferred, whereas later should be avoided)

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Thanks for the answers. Closing since it's been open for a long time.

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