On Thu, Sep 6, 2018 at 12:24 PM, mustafa katipoğlu
<98mustafakatipo...@gmail.com> wrote:
>
> If I use len() function inside of a foor loop , does it calculates the
> output each time? or if the output will be the same(like arrays) will it
> calculates the length of the function again ?
>
> var letterRunes =
> []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_")
>
>
> b := make([]rune, usernameLength)
>
>
> for i := range b {
> b[i] = letterRunes[rand.Intn(len(letterRunes))]
> }
It will recalculate the length each time through the loop.
Note that calculating the length of a slice is a fast operation; it's
a single memory load.
Ian
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