in reply to data manipulation
It really is not possible to overwrite data in file. You must replace the file with edited version of itself. (This would be true of any language) The perl runtime flags /p and /i should be a big help in doing this.
Process the file one line at a time.
- If the current line is a 'Parameters' line, extract the vector into a global array.
- Else if it is a 'Name' line, extract the block number into a global scalar.
- Else if it is a 'LowerLimit' line, update the value. (use $vector[$block])
- Else if it is a 'UpperLimit' line, update the value.
- Else do nothing
If you still have problems, post explicit questions.
Bill
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Seekers of Perl Wisdom