Generate a random double between -1 and 1 in Swift -

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this 1 should quite simple somehow can't find way this: have random double between -1 , 1.

everything found on internet either integers, 0 1 or didn't work.

i hope of guys can me!

let = (double(arc4random()) / double(uint32.max)) * 2 - 1

ps: use uint32.max swifty code ;)


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