range result in Tuple! and how to convert into assocArray by sort?
MichaelBi
shunjie.bi at gmail.com
Tue May 10 05:09:39 UTC 2022
On Tuesday, 10 May 2022 at 03:38:08 UTC, rikki cattermole wrote:
> If I am understanding the problem correctly, this is a super
> expensive method for doing something pretty simple. Even if it
> is a bit more code, this won't require memory allocation which
> in this case wouldn't be cheap (given how big DNA tends to be).
>
> string s = "ACGTACGT";
>
> uint[4] counts;
>
> foreach(char c; s) {
> switch(c) {
> case 'A':
> case 'a':
> counts[0]++;
> break;
> case 'C':
> case 'c':
> counts[1]++;
> break;
> case 'G':
> case 'g':
> counts[2]++;
> break;
> case 'T':
> case 't':
> counts[3]++;
> break;
> default:
> assert(0, "Unknown compound");
> }
> }
>
> writeln(counts);
yes, thanks. understood this. the problem for me now is after
learning D, always thinking about using range and function
composition...and forgot the basic algorithm :)
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