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Possible Duplicate:
Why avoid increment (“++”) and decrement (“–”) operators in JavaScript?
I’ve heard in a few places that it is not recommended to use ++ & — in javascript, and we should be using += 1 or -= 1 instead. Can anyone clarify why for me?
Because Douglas Crockford has his own opinions of how confusing something may or may not be. They are fine to use, JSLint is just projecting his opinions.