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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.


In reply to Re: data manipulation by BillKSmith
in thread data manipulation by ng0177

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

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