06-06-2008
awk help
Hi ,
I want to find out max of columns.
a.txt
10|20|xxxxx|yyy|c
20|30|xxxxxxxxx|yyyyyyyyyyyy|z
40|50|xxxxxxxxxxxxxxxx|yyy|C
cat a.txt |awk -F "|" '{print length($1),length($2), length($3),length($4)}'
2 2 5 3
2 2 9 12
2 2 16 3
Above one give the length of columns ,I want pick max of each column
i mean length of 16 th column data
40|50|xxxxxxxxxxxxxxxx|yyy|C
When use this ,I getting all records instead of picking that one which having length 16
cat a.txt |awk 'BEGIN{FS=OFS="|"} {if (length($3)==16);print}'
Thanks in advance
MR
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MEWL(1) General Commands Manual MEWL(1)
NAME
mewl - Message scanner for Mew 4 or later
SYNOPSIS
mewl [options] [folder [range]]
DESCRIPTION
The mewl utility extracts necessary fields from messages stored in folders. This command is necessary for Mew to implement the asynchro-
nous feature.
The options are as follows:
-a Print all necessary fields when picking.
-b dir Set the Mail home to dir.
-c bodylen
Set the max body length to be extracted to bodylen.
-d field
Set the field to be extracted to field.
-e command
Specify an external command to fetch mailbox.
-m options
Specify options for command.
-f fields
Specify fields to display.
-h Display this help message.
-i file Set the input stream to file.
-l length
Set the max field length to be extracted to length. The default value is 3. 0 means no limit.
-n Don't use fstat().
-p pattern
Specify the pick pattern.
-s src Set message source to src : '+folder range'.
-w Wait for stdio input to synchronize.
-v Display the version.
-x suffix
Use this suffix.
Definitions of the symbols above are as follows:
range N | [start]-[end] | last:N
pattern 'key=val' | 'key!=val' | '!<pattern>' | '(<pattern>)' | '<pattern>&<pattern>' | '<pattern>|<pattern>'
BUGS
If a field is long, only the beginning three lines are extracted by default.
March 5, 2003 MEWL(1)