Dear All,

I am trying to think of a way of getting all possible cases of a word to be looked at.

In a file i have some data like:

>gi|1870687|gb|U77948.1|HSU77948 Human Bruton's tyrosine kinase-associ
+ated protein-135 mRNA,
>gi|22415887|emb|AL683818.12| Mouse DNA sequence from clone RP23-229B2
+3 on chromosome 4, complete

[download]

I am looking for the latin names also like Homo sapiens etc. What i want to do now is not to miss the hits that could be " human " instead of " Human " or " mouse " instead of " Mouse ", i.e i want to look for all combinations of the words existing with uppercase and lowercase letters. I have an incling that i could use \u and \U or \L and \l.

What i am stuck with now is how to use them in the instance of this if statement, where the word is stored within the $filter scalar.

if($current_subject =~ /\b\Q$filter\E\b/)  # filter and get exact name

[download]

note: the $current_subject is the current line in the file

Thanks

In reply to Checking for all cases of a word by MonkPaul

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