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0.1 + 0.2 == 0.30000000000000004
forexample in Mozilla Developers its written:
arr.forEach(callback[, thisArg])
i know forEach usage etc. but i dont understand the way it declares the syntax
its written like
[, ]
what does
callback[, thisArg] mean?
why it opens the bracket, puts comma and closes bracket after
thisArg
???
in fact i cant learn forEach syntax and usage by the way its declared
8-}
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