just a shame its not in the core, no?

On Wednesday, 2 April 2014 18:06:03 UTC+1, A. Webb wrote:
>
> Using subs (no need for join) is the way I would go, just define
>  
>
>     (defn replace-at [s n c] (str (subs s 0 n) c (subs s (inc n))))
>
>     (replace-at "hello" 1 "a") ;=> "hallo"
>
> and carry on.
>
>  
>

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