Elementary task with regular expressions, indeed !!

• Move back to the very beginning of the file to change ( Ctrl + Origin )

• Open the Find/Replace dialog ( Ctrl + H )

• Type ^, in the Find what: box

• Type G1, in the Replace with: box

• Choose the Regular expression search mode

• Click on the Replace All button

Et voilà !

Notes :

• The ^ character is the symbol, meaning “beginning of line”, in regular expressions

• If you prefer to separate the string G1 from the rest of text, you may, either, add a space character after G1 or the symbol \t, for a tabulation character

Best regards,

guy038

P.S. :

For newby people, about regular expressions concept and syntax, begin with that article, in N++ Wiki :

http://docs.notepad-plus-plus.org/index.php/Regular_Expressions

In addition, you’ll find good documentation, about the Boost C++ Regex library, v1.55.0 ( similar to the PERL Regular Common Expressions, v1.48.0 ), used by Notepad++, since its 6.0 version, at the TWO addresses below :

http://www.boost.org/doc/libs/1_48_0/libs/regex/doc/html/boost_regex/syntax/perl_syntax.html

http://www.boost.org/doc/libs/1_48_0/libs/regex/doc/html/boost_regex/format/boost_format_syntax.html

• The FIRST link explains the syntax, of regular expressions, in the SEARCH part

• The SECOND link explains the syntax, of regular expressions, in the REPLACEMENT part

You may, also, look for valuable informations, on the sites, below :

http://www.regular-expressions.info

http://www.rexegg.com

http://perldoc.perl.org/perlre.html

Be aware that, as any documentation, it may contain some errors ! Anyway, if you detected one, that’s good news : you’re improving ;-))