This does not do what the title suggest the problem requires: finding the longest key first. If you have keys "Short" and "Longer Key", and the string is "This is a Short Key and a Longer Key", your solution will report "Short" (left most), while the OP original solution reports "Longer Key".

Now, it may be that the OP is satisfied by that - but the title suggests he won't.

In reply to Re^2: Matching Many Strings against a Large List of Hash Keys (case insensitively, longest key first) by JavaFan
in thread Matching Many Strings against a Large List of Hash Keys (case insensitively, longest key first) by Anonymous Monk

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