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Full Discussion: How to insert/expand data/rows in a file, with rules??
Top Forums Shell Programming and Scripting How to insert/expand data/rows in a file, with rules?? Post 302482232 by frans on Tuesday 21st of December 2010 02:11:37 AM
Old 12-21-2010
bash way:
bash code:
  1. #!/bin/bash
  2. while read A B C
  3. do
  4.    for ((i=A; i<=B; i++)); do ((N&#91;$i]+=C)); done
  5. done <file
  6. for i in ${!N[@]}; do echo "$i ${N[$i]}"; done
 

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LEARN ABOUT XFREE86

let

let(1)                                                             User Commands                                                            let(1)

NAME

       let - shell built-in function to evaluate one or more arithmetic expressions

SYNOPSIS

   ksh
       let arg...

DESCRIPTION

   ksh
       Each arg is a separate "arithmetic expression" to be evaluated.

EXIT STATUS

       The following exit values are returned:

       0        The value of the last expression is non-zero.

       1        The value of the last expression is zero.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       +-----------------------------+-----------------------------+
       |Availability                 |SUNWcsu                      |
       +-----------------------------+-----------------------------+

SEE ALSO

       ksh(1), set(1), typeset(1), attributes(5)

SunOS 5.10                                                          15 Apr 1994                                                             let(1)
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