Re^3: Split string variable of log input and output pieces in text file

Ok, split /[\s:()]+/,$line>, please read http://perldoc.perl.org/functions/split.html.

Split takes a line as input and makes an array according to the split regex. The split regex defines what constitutes a new array element boundary. During the split process the "separators" are "consumed", meaning deleted.

The regex above says: "if I see one or more, spaces, colons or left paren or right paren", delete those and move what is left over to the left as an array element. This part: [6,7,8,-2] says ok, I've lots of stuff but I only want the 7th,8th,9th thing and the 2nd one from the end. Perl arrays are indexed at zero. So the first one is index[0]. Run my "hint" code and see what happens if you delete () from the regex. Experimentation is key. Run some examples and report back.

This is not a perfect analogy, but if you had an old style typewriter and hit "carriage return" every time you saw the matching regex, you would wind up with my "hint" code.

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Re^4: Split string variable of log input and output pieces in text file by firepro20 (Novice) on Apr 18, 2016 at 12:11 UTC
Thankyou Marshall for explaining this. Now I am able to adapt the split regex according to other log formats that I have	[reply]
Re^4: Split string variable of log input and output pieces in text file by Anonymous Monk on Apr 23, 2016 at 14:57 UTC
Hi Marshall if I have a log now that I want the separators [] to be consumed, do I need to change the limiters? Or just modify the code like so: `split /[[]\s:()]+/,$line>`	[reply] [d/l]
Re^5: Split string variable of log input and output pieces in text file by AnomalousMonk (Archbishop) on Apr 23, 2016 at 16:10 UTC
`split /[[]\s:()]+/,$line>` Have you tried to use the quoted code? What happens if you do? (I'm not sure what the `'>'` on the end of this code fragment is supposed to be.) I'm not familiar with your data, but I think I would try (untested) `split /[\[\]\s:()]+/, $line` instead. Be aware that this may generate an extraneous empty string at the beginning of the split output list, so your selection indices may need adjustment. Give a man a fish: `<%-{-{-{-<`	[reply] [d/l] [select]