BASH Script - Find Replace multiple values

Question

I've got a very simple bash script which I'm passing values to

I want to strip the prefix from the value passed to the script.

The works and strips test- from the passed value..

IN=$1
arrIN=(${IN//test-/})
echo $arrIN

So test-12345 returns 12345

Is there anyway to amend this so it will remove either test- or local- ?

I've tried :

arrIN=(${IN//test-|local-/})

But that didn't work..

Thanks

${var##*-} gets the portion from last - to the end of the string. But you are using array notation, so it is not clear if this is enough/ — fedorqui
– fedorqui, Commented Dec 3, 2014 at 12:42

SMA · Accepted Answer · 2014-12-03 13:01:25Z

1

Try using sed as below:

IN=$1
arrIN=$(echo $IN | sed -r 's/test-|local-//g')
echo $arrIN

Here sed will search for "test-" or "local-" and remove them completely anywhere in the whole input.

edited Dec 3, 2014 at 13:01

answered Dec 3, 2014 at 12:43

SMA

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1 Comment

Rocket Over a year ago

Thanks - I've gone for this answer as I understand it easier.. When I look back at this in 6 months, I'll know what it does :)

jherran · Accepted Answer · 2014-12-03 12:40:19Z

1

If you want to change "test-" or "local-" to "", you could use a command like this:

awk '{gsub(/test-|local-/, ""); print}'

answered Dec 3, 2014 at 12:40

jherran

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Comments

Kalanidhi · Accepted Answer · 2014-12-03 12:42:08Z

1

You can use sed and get the exact result

IN=$1
arrIN=$( echo $IN | sed 's/[^-]\+.//')
echo $arrIN

answered Dec 3, 2014 at 12:42

Kalanidhi

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whoan · Accepted Answer · 2014-12-03 12:44:43Z

1

You can do it with extglob activated:

shopt -s extglob
arrIN=(${IN//+(test-|local-)/})

From man bash:

  ?(pattern-list)  
         Matches zero or one occurrence of the given patterns  
  *(pattern-list)  
         Matches zero or more occurrences of the given patterns  
  +(pattern-list)  
         Matches one or more occurrences of the given patterns  
  @(pattern-list)  
         Matches one of the given patterns  
  !(pattern-list)  
         Matches anything except one of the given patterns

answered Dec 3, 2014 at 12:44

whoan

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