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Richard Colman wrote:
> I need to to reverse compliment a nucleotide sequence, so
>
> C become a G
> G becomes a C
> A becomes a T
> T becomes an A
>
> I need to go through a string a character at a time and build a new string.
>
> So:
>
> "ACTG" becomes "TGAC"
>
> Is there an easy way to do this?
The following does something simple like Perl's tr///.
function Translate(text, from, to)
{
var iText = 0;
var iTrans = 0;
var result = "";
var ch = "";
for (iText = 1; iText lte Len(text); iText = iText + 1)
{
ch = Mid(text, iText, 1);
iTrans = Instr(ch, from);
if (iTrans gt 0)
ch = Mid(to, iTrans , 1);
result = result & ch;
}
return result;
}
No error checking, quick hack, but it ought to work.
K.
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