Replacing character in column 1 with FF Character?

[RJM 55]

How can I scan column 1 of a file and replaced all hits on the # ‘1’ with the ‘FF’ character?

[PeterJones]

@RJM-55

use regular expression mode in the search

• FIND WHAT: ^1 will search for lines that begin with the character 1 (which is what I think you meant by “column 1” and “hits on the # ‘1’”
• REPLACE WITH:
  • If you mean FF as in the hex code 0xFF for the character 255: \xFF will replace that character 1 with the character at codepoint 255
  • If you mean FF as in “Form Feed” at ASCII 0x0C (ASCII 12), then \x0C will do it
  • If you have a different meaning for FF, you will need to be more specific.

[RJM 55]

This is exactly what I needed! Thank you very much!!!