From: nospam@needed.invalid   
      
   On Thu, 3/13/2025 3:56 PM, Adam wrote:   
   > On 03/13/2025 12:16 PM, Paul wrote:   
   >> On Thu, 3/13/2025 2:17 PM, Adam wrote:   
   >>>   
   >>> The following ...   
   >>>   
   >>> grep -e pattern1 -e pattern2 wget_output_file.txt   
   >>>   
   >>> is NOT giving the result that I'm looking for, which is BOTH patterns must   
   be in the file.   
   >>   
   >> "The egrep variant supports an extended regular expression syntax added by   
   Alfred Aho   
   >>   after Ken Thompson's original regular expression implementation.[12]   
   >>   
   >>   The "fgrep" variant searches for any of a list of fixed strings using   
   >>   the Aho–Corasick string matching algorithm."   
   >>   
   >> *******   
   >>   
   >> sample.txt   
   >> ----------   
   >> I am a cat   
   >> I am a dog   
   >> I am a cat or a dog   
   >> I am an elephant   
   >>   
   >> (stdout)   
   >>   
   >> $ egrep "cat|dog" sample.txt   
   >> I am a cat   
   >> I am a dog   
   >> I am a cat or a dog   
   >>   
   >> "If at first you don't grep, try try again... with a egrep or a fgrep" :-)   
   >>   
   >> It's a good thing these are documented.   
   >>   
   >>      Paul   
   >>   
   >   
   > I'm looking for AND (not OR) operator. So, both patterns must be in the file   
   (not line) or FALSE is returned.   
   >   
      
    sample.txt   
   ----------   
      
   I am a cat   
   I am a dog   
   I am a cat and a dog   
   I am a dog and a cat   
   I am an elephant   
      
   I had to use CoPilot, as my crafting experiments all failed.   
      
   $ egrep 'cat.*dog|dog.*cat' sample.txt                   # cat followed by dog   
   or dog followed by cat   
   I am a cat and a dog   
   I am a dog and a cat   
   $   
      
   Note that, this needs to be rigorously tested.   
   Just based on my failures before asking CoPilot,   
   you can't just assume this actually works...   
      
   I am a cat   
   I am a dog   
   I am a cat and a dog   
   I am a dog and a cat   
   I am a dog dog and a cat   
   I am a dog dog and a cat dog   
   I am a dog dog and a cat cat   
   I am a dog cat and a dog cat   
   I am a dog cat and a cat dog   
   I am an elephant   
      
   $ egrep 'cat.*dog|dog.*cat' sample.txt   
   I am a cat and a dog   
   I am a dog and a cat   
   I am a dog dog and a cat   
   I am a dog dog and a cat dog   
   I am a dog dog and a cat cat   
   I am a dog cat and a dog cat   
   I am a dog cat and a cat dog   
   $   
      
   I would imagine this technique rapidly runs out of legs.   
      
      Paul   
      
   --- SoupGate-DOS v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)