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Or is your question intended to address a more general case? Of course I would like a solution for the general case. The reason I asked here is that I thought I had missed something obvious, because it seemed such a basic thing to do. At least it is easy in other programming languages I use. I am aware that you can use Perl modules like Math::BigInt, but I hope I can get this done without having to 'include' a huge, slow monster like that. For example, the script I mentioned reads many lines from a file, which may have been generated by another tool. The file may be corrupted or wrong. I just want a general, fast, simple integer validation solution that I can reuse in other scripts I have around. I had hoped for a ready-made solution, but I'll have to code it myself. So let's recap what I have now:
Have I missed something? Before I begin, could we use pack/unpack instead? I am not very familiar with them, but there are several integer types there. In reply to Re^4: Reliably parsing an integer
by rdiez
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