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Top Forums Shell Programming and Scripting String operation in csh AIX 4.3.2.0 Post 302992158 by bakunin on Wednesday 22nd of February 2017 07:20:31 AM
Old 02-22-2017
Moderator's Comments:
Mod Comment Sorry for moving around your thread, i wrongly thought it deals with the same problem as your other thread.


Quote:
Originally Posted by Nadielosabra
The string should be cut always after the 7. delimiter even if there are no number between two delimiters like in sample 1 and 2 . That maybe the reason it doesnot works with the cut command.
This is actually exactly the way cut works:

Code:
# printf "\"%s\"\n" $(echo "1;2;3;;;6;7;8" | cut -d';' -f1)
"1"
# printf "\"%s\"\n" $(echo "1;2;3;;;6;7;8" | cut -d';' -f4)
""

You probably didn't interpret the returned empty string as a result, like i did above in the little proof of concept.

Anyway, i strongly suggest you stop using csh and start using a less bugridden shell. AIX 4.3.2 (you might want to consider updating this to 4.3.3 ML12 too) offers a ksh88 and a ksh93.

I hope this helps.

bakunin

Last edited by bakunin; 02-22-2017 at 08:31 AM..
This User Gave Thanks to bakunin For This Post:
 

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MB_STRCUT(3)								 1							      MB_STRCUT(3)

mb_strcut - Get part of string

SYNOPSIS
string mb_strcut (string $str, int $start, [int $length = NULL], [string $encoding = mb_internal_encoding()]) DESCRIPTION
mb_strcut(3) extracts a substring from a string similarly to mb_substr(3), but operates on bytes instead of characters. If the cut position happens to be between two bytes of a multi-byte character, the cut is performed starting from the first byte of that character. This is also the difference to the substr(3) function, which would simply cut the string between the bytes and thus result in a malformed byte sequence. PARAMETERS
o $str - The string being cut. o $start - Starting position in bytes. o $length - Length in bytes. If omitted or NULL is passed, extract all bytes to the end of the string. o $encoding -The $encoding parameter is the character encoding. If it is omitted, the internal character encoding value will be used. RETURN VALUES
mb_strcut(3) returns the portion of $str specified by the $start and $length parameters. SEE ALSO
mb_substr(3), mb_internal_encoding(3). PHP Documentation Group MB_STRCUT(3)
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