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Top Forums Shell Programming and Scripting Converting csv file to flat file Post 303023672 by shamrock on Thursday 20th of September 2018 04:34:46 PM
Old 09-20-2018
Quote:
Originally Posted by rohit_shinez
Thanks don, Is there a way i can predine the columns length in shell, because here there are two columns. What if the columns are increased and the length needs to be defined accorindly instead of hardcoding every time
Code:
country,id,role
Australia,1234,engineer
Africa,12399999,doctor

role column will start from 31-35.
You can use Don's example to cobble up something...and yes you can change the printf specifier so it'll take variable length fields instead of fixed length ones that may exceed the maximum specified field width.

Hint...lookup the "%.*s" printf specification.
 

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COLRM(1)						    BSD General Commands Manual 						  COLRM(1)

NAME
colrm -- remove columns from a file SYNOPSIS
colrm [start [stop]] DESCRIPTION
The colrm utility removes selected columns from the lines of a file. A column is defined as a single character in a line. Input is read from the standard input. Output is written to the standard output. If only the start column is specified, columns numbered less than the start column will be written. If both start and stop columns are spec- ified, columns numbered less than the start column or greater than the stop column will be written. Column numbering starts with one, not zero. Tab characters increment the column count to the next multiple of eight. Backspace characters decrement the column count by one. ENVIRONMENT
The LANG, LC_ALL and LC_CTYPE environment variables affect the execution of colrm as described in environ(7). EXIT STATUS
The colrm utility exits 0 on success, and >0 if an error occurs. SEE ALSO
awk(1), column(1), cut(1), paste(1) HISTORY
The colrm command appeared in 3.0BSD. BSD
August 4, 2004 BSD
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