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Top Forums Shell Programming and Scripting Replace all string matches in file with unique random number Post 303024269 by funkman on Friday 5th of October 2018 03:42:23 AM
Old 10-05-2018
Replace all string matches in file with unique random number

Hello
Take this file...
Code:
Test01
Ref test
Version 01

Test02
Ref test
Version 02

Test66
Ref test
Version 66

Test99
Ref test
Version 99

I want to substitute every occurrence of Test[0-9]{2} with a unique random number, so for example, if I was using sed, substitution would be something like the below but obviously the below does reevaluate the random number for each occurrence of Test[0-9]{2}
Code:
num=$((1+RANDOM 20 % 60))
sed -ri "s/Test[0-9]{2}/Test${num}/" test_file

So on the execution of substitution, the file would read something like
Code:
Test59
Ref test
Version 01

Test57
Ref test
Version 02

Test48
Ref test
Version 66

Test51
Ref test
Version 99

Moderator's Comments:
Mod Comment Please use CODE tags when displaying sample input and sample output as well as when displaying code segments.

Last edited by MadeInGermany; 10-05-2018 at 09:03 AM..
 

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HDFLS(1)						      General Commands Manual							  HDFLS(1)

NAME
hdfls - list basic information about an HDF file SYNOPSIS
hdfls [-o] [-l] [-d] [-v] [-g] [-s] [-h] [-t n] hdf_file DESCRIPTION
hdfls provides general information about the tags, reference numbers, and if requested, lengths of the data elements. OPTIONS
-o display the reference numbers in ascending order. -l long format. Display more information about the file. -d Display offset and length information for each element in the file. -v verbose. Display annotation and label text, along with the format triggered by the -l flag. -g Group. List items by group. -s Special elements. Display detailed information about special elements. -d Display offset and length information for each element in the file. -h Dump DD block information. -t n Tag. Only list information about the specified tag. Must be followed by a tag number. EXAMPLES
A file called "aa.hdf" contains three items associated with a raster image; the image dimensions, a palette, and the raster image. To dis- play information about the contents of this file, the following command is used. hdfls aa.hdf The following output is displayed: aa.hdf: Image Dimensions-8: (Raster-8): (tag 200) Ref nos: 1 Image Palette-8: (Raster-8): (tag 201) Ref nos: 3 Raster Image-8: (Raster-8): (tag 202) Ref nos: 1 The following displays the same information with the length of each data element: hdfls -l aa.hdf This would result in the following information being displayed: aa.hdf: Image Dimensions-8: (Raster-8) : (tag 200) Ref no 1 4 bytes Image Palette-8: (Raster-8) : (tag 201) Ref no 3 768 bytes Raster Image-8: (Raster-8) : (tag 202) Ref no 1 120000 bytes SEE ALSO
hdf(5) October 31, 1999 HDFLS(1)
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