Tagged Questions
0
votes
3answers
50 views
Grep end regex matching
On OS X, system_profiler SPHardwareDataType outputs:
Hardware Overview:
Model Name: MacBook Pro
Total Number of Cores: 4
L2 Cache (per Core): 256 KB
L3 Cache: 8 MB
Memory: 8 GB
I want to ...
1
vote
3answers
174 views
awk, sed, grep, perl… which to print out in this case?
I have this syntax in a file (http response times from analog):
<thead><tr><th class="x">seconds</th><th class="R">reqs</th><th ...
2
votes
3answers
411 views
Average rows with same first column
Given a file with two columns:
Id ht
510 69
510 67
510 65
5l0 62
510 59
601 29
601 26
601 21
601 20
I need a way to coalesce all rows with the same ID into one that has an average height. In this ...
2
votes
3answers
81 views
Need to parse a double entry table with two pairs
I have this two-entry table resulting from a program output:
Variable1 : Value1
Variable2 : Value2
Variable3 : Value3
Variable4 : Value4
Variable5 : Value5
Variable6 : Value6
...
2
votes
2answers
504 views
How to do a regex search in a UTF-16LE file while in a UTF-8 locale?
EDIT: Due to a comment Warren Young made, it made me realize that I was not clear on one quite relevant point. My search string is already in UTF-16LE order (not in Unicode Codepoint order, which is ...
2
votes
1answer
170 views
Is it a good idea to supplement shell script with perl purely for use of regex?
I'm looking for a simple way to utilize regex in a UNIX shell script where not every system will have perl extensions built into grep. What is really helpful about perl regex here is back/forward ...
2
votes
1answer
487 views
Escaping of meta characters in basic/extended posix regex strings in grep
Is it possible to escape all meta characters of a string inside a variable before passing it to grep? I know similar question has been asked before on SE
(here) and also a good explanation here, but I ...
7
votes
6answers
1k views
Is there any alternative to grep's -A -B -C switches (to print few lines before and after )?
grep -A 2 -B 3
prints 2 lines after the grep string and prints 3 lines before.
grep -C 3
prints 3 Lines before and 3 lines after
Unfortunately, the grep I'm using does not support these ...
