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Full Discussion: set length
Top Forums UNIX for Dummies Questions & Answers set length Post 302361711 by aadi_uni on Wednesday 14th of October 2009 01:50:28 AM
Old 10-14-2009
set length

As every sort file in UNIX has specified fixed length for every line.
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Code:
$ sort abc
2233|abc xyzw     |g.m     | sales   |12/12/12|   90000
2135|abc9022 abc|gj        |admin   |24/05/09|1200000

In above abc is a file ..and as output shown...although length of both lines are different,they are shown as they have same length..Like in Microsoft Word JUSTIFIED format...

My question is...Can we set variable length of a line to sort files??

EDIT: Use [code] and [/code] tags next time when posting code, data or logs etc.

Last edited by zaxxon; 10-14-2009 at 07:10 AM.. Reason: code tags
 

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Char(3pm)						User Contributed Perl Documentation						 Char(3pm)

NAME
PDL::Char -- PDL subclass which allows reading and writing of fixed-length character strings as byte PDLs SYNOPSIS
use PDL; use PDL::Char; my $pchar = PDL::Char->new( [['abc', 'def', 'ghi'],['jkl', 'mno', 'pqr']] ); $pchar->setstr(1,0,'foo'); print $pchar; # 'string' bound to "", perl stringify function # Prints: # [ # ['abc' 'foo' 'ghi'] # ['jkl' 'mno' 'pqr'] # ] print $pchar->atstr(2,0); # Prints: # ghi DESCRIPTION
This subclass of PDL allows one to manipulate PDLs of 'byte' type as if they were made of fixed length strings, not just numbers. This type of behavior is useful when you want to work with charactar grids. The indexing is done on a string level and not a character level for the 'setstr' and 'atstr' commands. This module is in particular useful for writing NetCDF files that include character data using the PDL::NetCDF module. FUNCTIONS
new Function to create a byte PDL from a string, list of strings, list of list of strings, etc. # create a new PDL::Char from a perl array of strings $strpdl = PDL::Char->new( ['abc', 'def', 'ghij'] ); # Convert a PDL of type 'byte' to a PDL::Char $strpdl1 = PDL::Char->new (sequence (byte, 4, 5)+99); $pdlchar3d = PDL::Char->new([['abc','def','ghi'],['jkl', 'mno', 'pqr']]); string Function to print a character PDL (created by 'char') in a pretty format. $char = PDL::Char->new( [['abc', 'def', 'ghi'], ['jkl', 'mno', 'pqr']] ); print $char; # 'string' bound to "", perl stringify function # Prints: # [ # ['abc' 'def' 'ghi'] # ['jkl' 'mno' 'pqr'] # ] # 'string' is overloaded to the "" operator, so: # print $char; # should have the same effect. setstr Function to set one string value in a character PDL. The input position is the position of the string, not a character in the string. The first dimension is assumed to be the length of the string. The input string will be null-padded if the string is shorter than the first dimension of the PDL. It will be truncated if it is longer. $char = PDL::Char->new( [['abc', 'def', 'ghi'], ['jkl', 'mno', 'pqr']] ); $char->setstr(0,1, 'foobar'); print $char; # 'string' bound to "", perl stringify function # Prints: # [ # ['abc' 'def' 'ghi'] # ['foo' 'mno' 'pqr'] # ] $char->setstr(2,1, 'f'); print $char; # 'string' bound to "", perl stringify function # Prints: # [ # ['abc' 'def' 'ghi'] # ['foo' 'mno' 'f'] -> note that this 'f' is stored "f" # ] atstr Function to fetch one string value from a PDL::Char type PDL, given a position within the PDL. The input position of the string, not a character in the string. The length of the input string is the implied first dimension. $char = PDL::Char->new( [['abc', 'def', 'ghi'], ['jkl', 'mno', 'pqr']] ); print $char->atstr(0,1); # Prints: # jkl perl v5.14.2 2011-03-30 Char(3pm)

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