I have to extract values m,n,p,q,s,t from the above array

First thing, that is not an array, at least not in Perl. I'm not familiar with any language that has that array syntax. So it's hard to even hazard a guess. From just looking at the thing, it might involve split by the : character, but again, I'm really drawing a blank here.

Any further context you can give regarding this will probably benefit you with more concise answers.