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QUOTED
"I read somewhere that, while he wasn't as famous as Steve Jobs, that his legacy was on the same level. I totally agree. He created the modern interactive operating system."
— Dave Winer, blogger and RSS pioneer, on Dennis Ritchie, who has died at 70, reportedly after a long illness. Ritchie created the C programming language and was co-creator of Unix, whose "spiritual descendants"ZDNet lists: "Linux, Android, Mac OS, iOS, JavaScript, C++, the genius of the Internet and a world full of developers." Ritchie worked at Bell Labs, which today told employees of the death of one of its "most respected researchers."
How sad, Dennis Ritchie was one of the famous people at Bell Labs when I first went to work there.  |  |
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Use of character range in awk Hi all, I am having a bit of a hard time using awk. I must do something wrong, but I don't know what... Any help would be greatly appreciated! I read a file, as follows : Code: ... ATOM 21 C THR A 4 23.721 -26.194 1.909 1.00 32.07 C ATOM 22 O THR A 4 24.874 -26.014 1.536 1.00 32.36 O ATOM 23 CB THR A 4 22.548 -26.219 -0.334 1.00 31.56 C ATOM 26 N CYS A 5 23.261 -25.726 3.072 1.00 32.18 N ATOM 27 CA CYS A 5 24.119 -24.983 4.010 1.00 32.76 C ... It has thousands of lines like this. I wish to sort some data out, but only when column 5 (here an "A") is within a range of letters accessible via the variabledata. data is a user input and can be any letters in the range A-Z, in any combinaison (i.e. "F", "ABCFIZ", "A-GX", "KJHGF", ...). So I do this : Code: awk '{if ($5 == "'[$data]'" ) {do_something}}' $in >> $outThat it is not working. If I put a single letter (e.g. $5 == "A"), it works just fine, but as long as I want a variable, it doesn't output anything. I tried A LOT of combinaison around the metacharacters [] , like : "'[$data]'", "'['$data']'", "'\[$data\]'", "'["$data"]'", etc and nothing works - and often yielded errors. I'm out of ideas, if anyone has a suggestion...  I may add, for precision sake, that the quoted awk code is within a much longer script, called from and programmed into tcsh. |
 | ɹoʇɐɹǝpoɯ | Join Date: Feb 2005 Location: Boston, MA Posts: 6,527 Thanks: 50 Thanked 245 Times in 238 Posts |
nawk -v r='A-C' '$5 ~ "[" r "]"' myFile
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