Well, for one thing, both files are being opened for "read only" access ("<"). "+<" will allow both read and write.

You might consider reading the first file's code - room pairs into a hash (presuming that each numeric code is unique) and open the second file substituting the hash key for the hash value "looked up" in the first file.

<><

generator

In reply to Re: Search & Replace Across Two Files by generator
in thread Search & Replace Across Two Files by sophix

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