advanced code snippet search

Posted By

symsec on 10/20/12


Tagged

regex Bash pattern match expansion extglob globbing


Versions (?)

Bash pattern matching using extended globbing

 / Published in: Bash
 

Using a (faster) case structure to do bash built-in pattern matching. See Bash hackers for more information. Thanks to gnashley for the snippet.

Expand | Embed | Plain Text 
  1. #!/bin/sh
  2.  
  3. thisString="1 2 3 4 5"
  4. searchString="1 2"
  5.  
  6. # if you single quote your input, you could do this
  7. # searchString=$1
  8.  
  9. case $thisString in
  10.  
  11.   # match exact string
  12.   "$searchString") echo yep, it matches exactly;;
  13.  
  14.   # match start of string
  15.   "$searchString"*) echo yep, it matches at the start ;;
  16.  
  17.   # match end of string
  18.   *"$searchString") echo yep, it matches at the end ;;
  19.  
  20.   # searchString can be anywhere in thisString
  21.   *"$searchString"*) echo yep, it matches in the middle somewhere ;;
  22.  
  23.   *) echo nope ;;
  24.  
  25. esac

Report this snippet  

You need to login to post a comment.