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Top Forums UNIX for Dummies Questions & Answers Passing values from file into array in Bash Post 302732077 by ShiGua on Friday 16th of November 2012 02:04:27 PM
Old 11-16-2012
Passing values from file into array in Bash

Hi,

I'm trying to write a bash script that takes a file and passes each line from the file into an array with elements separated by column.

For example:

Sample file "file1.txt":

Code:
1 name1 a first
2 name2 b second
3 name3 c third

and have arrays such as:

Code:
line1 = ( "1" "name1" "a" "first" )
line2 = ( "2" "name2" "b" "second" ) 
line1 = ( "3" "name3" "c" "third" )

I'd also like to know if it's possible to pass each column of values into its own array, such as:

Code:
column1 = ( "1" "2" "3" )
column2 = ( "name1" "name2" "name3" )
column3 = ( "a" "b" "c" )
column4 = ( "first" "second" "third" )

Thank you!

Last edited by Scrutinizer; 11-16-2012 at 11:01 PM.. Reason: code tags
 

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COMM(1) 						    BSD General Commands Manual 						   COMM(1)

NAME
comm -- select or reject lines common to two files SYNOPSIS
comm [-123f] file1 file2 DESCRIPTION
The comm utility reads file1 and file2, which should be sorted lexically, and produces three text columns as output: lines only in file1; lines only in file2; and lines in both files. The filename ``-'' means the standard input. The following options are available: -1 Suppress printing of column 1. -2 Suppress printing of column 2. -3 Suppress printing of column 3. -f Fold case in line comparisons. Each column will have a number of tab characters prepended to it equal to the number of lower numbered columns that are being printed. For example, if column number two is being suppressed, lines printed in column number one will not have any tabs preceding them, and lines printed in column number three will have one. comm assumes that the files are lexically sorted; all characters participate in line comparisons. EXIT STATUS
comm exits 0 on success, >0 if an error occurred. SEE ALSO
cmp(1), diff(1), sort(1), uniq(1) STANDARDS
The comm utility conforms to IEEE Std 1003.2-1992 (``POSIX.2''). BSD
June 6, 1993 BSD
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