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Array.iter on byte[] ?
f#

I can't get Array.iter to work with byte arrays. Following code is a sample. I couldn't get it work with its single dimensional version either:

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let randomizeArrays a:byte[][] = 

    Array.iter (fun n -> rnd.NextBytes(a.[n])) a

(Sorry for emoticon nonsense in the code but I couldn't figure out how to do it right in 5 minutes and I really don't want to spend more time on it)

Today's errors are:

Error 1 This expression has type int but is here used with type byte.

Error 2 This expression has type unit but is here used with type byte [] [].

Thanks.

SSG

.

Two main problems. First, if you want to declare the type of a parameter, you need to surround it with parentheses. Second, the lambda argument of Array.iter takes one of the array values (not an index) as a parameter. Here's the code I think you want.

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#light
let rnd = new System.Random()
let randomizeArrays (a:byte[][]) = 
    Array.iter (fun arr -> rnd.NextBytes(arr)) a
By on 11/28/2008 6:23 PM ()

Yes that did the trick, thanks Brian.

By on 11/28/2008 7:23 PM ()

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