Searching for '\' characters

[Loon]

Hey there,<br><br>&nbsp;&nbsp;&nbsp;it's wierd but I can't get the following to work, must be doing something silly somewhere. I need to remove the following strings from a text file:<br><br>&quot;\&quot;&nbsp;&nbsp;&nbsp;&nbsp;i.e. the backslash characeter (usually at the end of a line)<br>and<br>&quot;\n\&quot;&nbsp;&nbsp;i.e. backslash n backslash (usually at the end of the line or the only thing on a line)<br><br>I am using:<br><br><FONT FACE=monospace>$string =~ s/\\//g;</font><br>and<br><FONT FACE=monospace>$string =~ s/\\n\\//g;</font><br><br>But they don't seem to be working, anyone got any better regexps (i.e. one that works&nbsp;&nbsp;;-))<br><br>Many thanx!<br>Loon

 

[MikeLacey]

Here's how to remove a \ from a string.<br><br>$s=&quot;hello\\&quot;;<br>print &quot;$s\n&quot;;&nbsp;&nbsp;&nbsp;# displays 'hello\'<br>$s=~s/\\//;<br>print &quot;$s\n&quot;;&nbsp;&nbsp;&nbsp;# displays 'hello'<br><br>that sequence of chars at the end of lines in your text files looks weird.<br><br>\n is the normal &quot;new-line&quot; character -- so I would expect to see that on the end of each line<br><br>Look again at your data.... you might be misreading it? <p>Mike<br><a href=mailto:michael.j.lacey@ntlworld.com>michael.j.lacey@ntlworld.com</a><br><a href=

http://www.cargill.com/>

Cargill's Corporate Web Site</a><br>

 

[Loon]

Mike,<br>&nbsp;&nbsp;&nbsp;&nbsp;if it looks wierd it's HPs fault!! It's from one of their HPUX message catalogues that their STM tool uses, for example:<br><FONT FACE=monospace><br>$<br>$ STM_DIAG2_WARNING<br>$<br>1 WARNING: Could not open DIAG2 file. \n\<br>\n\<br>Possible Causes/Recommended Action: \n\<br>\n\<br>&nbsp;&nbsp;&nbsp;The diag2 pseudo driver may not be configured into this operating system. \<br>This driver is required for the proper functioning of various support tools. \<br>Please consult the system installation manual on how to configure \<br>diag2 driver.<br>$<br></font><br><br>So the \n\ characters are actually different to the \n in the catalog iteself as they are used to format the messages when they are displayed by the STM application.<br><br>And the reason my regexps weren't working was I was writing $_ to a file rather than my modified string! DOH! Friday afternoon bug....<br><br>Cheers!<br>Loon<br>

 

[MikeLacey]

Hi Loon,<br><br>So, in Perl terms, that line <br><br>WARNING: Could not open DIAG2 file. \n\<br><br>is equivalent to:<br><br>&quot;WARNING: Could not open DIAG2 file. \\\n\\\n&quot;<br><br>which looks more than a bit weird but look at the last three (visible) chars on the line, they each have to be escaped out. So - to remove them then, the regex:<br><br>$var =~ s/\\\n\\\$//;<br><br>will match those three chars when they occur at the end of a string (or line) in $var (that's the $ bit at the end of the expression) and remove them from $var.<br><br>You can do something similar when it's just a \ char at the end of the line like this:<br><br>$var =~ s/\\$//;<br><br>Backslashes R Us, unfortunately.<br><br>Hope I understood your problem correctly and that the response is useful. Please let me know if I got it wrong at any point.<br> <p>Mike<br><a href=mailto:michael.j.lacey@ntlworld.com>michael.j.lacey@ntlworld.com</a><br><a href=

http://www.cargill.com/>

Cargill's Corporate Web Site</a><br>

 

[Loon]

Tip top Mike!<br><br>Cheers<br>Loon