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By: a guest on May 28th, 2012  |  syntax: None  |  size: 0.46 KB  |  hits: 14  |  expires: Never
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  1. Difference between grep and perl regex?
  2. $ cat testfile.txt
  3. A line of text
  4. SOME_RULE = $(BIN)
  5. Another line of text
  6.  
  7. $ grep "SOME_RULEs*=s*$(BIN)" testfile.txt
  8. SOME_RULE = $(BIN)
  9.  
  10. $ perl -p -e "s/SOME_RULEs*=s*$(BIN)/Hello/g" testfile.txt
  11. A line of text
  12. SOME_RULE = $(BIN)
  13. Another line of text
  14.        
  15. perl -we "my $HOME"
  16.        
  17. perl -p -e 's/SOME_RULEs*=s*$(BIN)/Hello/g' testfile.txt
  18.        
  19. grep -E "SOME_RULEs*=s*$(BIN)" testfile.txt
  20.        
  21. s/SOME_RULEs*=s*$(BIN)/Hello/g
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