Grepper: Difference between revisions
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Small usefull command line program called '''grepper''' which is a usefull to complement POSIX '''grep'''. | Small usefull command line program called '''grepper''' which is a usefull to complement POSIX '''grep'''. | ||
The idea is that you have a file that can be 'whatever' delimited and then you want to extract entire rows, but you only want to do the search in specific columns. | |||
# You supply a file containing all the ''keys'' that will be searched for in the ''datafile''. The program will only do a single pass of the ''datafile''. | # You supply a file containing all the ''keys'' that will be searched for in the ''datafile''. The program will only do a single pass of the ''datafile''. | ||
# You specify which column to use for the search. | # You specify which column to use for the search. | ||
The program supports the following options which should make it somewhat similar to '''grep''' | |||
* -i don't care about cases (capital letter vs small letter) | |||
* -w seach for whole words | |||
*-v do complement | |||
Revision as of 18:53, 15 March 2014
Small usefull command line program called grepper which is a usefull to complement POSIX grep.
The idea is that you have a file that can be 'whatever' delimited and then you want to extract entire rows, but you only want to do the search in specific columns.
- You supply a file containing all the keys that will be searched for in the datafile. The program will only do a single pass of the datafile.
- You specify which column to use for the search.
The program supports the following options which should make it somewhat similar to grep
- -i don't care about cases (capital letter vs small letter)
- -w seach for whole words
- -v do complement