in reply to How can I do this action WITHOUT split?

Do you recognize that you'll lose specificity (detail) by doing what you specify?

Since $str_no_dash has a charset of just three alphabetic characters, while $str_with_dash has at least 5 times as many distinct alphas (I didn't use a regex to count for me and I ran out of fingers... ) that the processing you specify is a one-way system. That means there'll be no way to pass on all the detail in $str_with_dash nor to recover all that detail from the result of the processing.

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Re^2: How can I do this action WITHOUT split?
by Anonymous Monk on Feb 22, 2014 at 23:55 UTC
    No, this was not the question ww...
    The sequence with the 3 letters is the output of a prediction algorithm, which has 3 labels only (in this case I, M and O).
    The sequence with the hyphens is the same sequence but refers to the amino-acid sequence instead (so yes, there are 20 letters in that case).
    If you remove the hyphens, you will see that both sequences are of the same length, so what I wanted is to replace each letter of the amino-acid sequence with the respective predicted label of it.
    Thanks to everyone for answering, now my code runs extremely faster!
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