Seriously. There doesn’t seem to be a way to do this. Every thing I ever try I just get bad substitution errors. The internet is full of people posting code that’s supposed to compare file extensions but none of it works. I’ve spent all morning trying everything I could find. I already gave up and I’m making this progeam in python instead but now I’m curious. How tf do you actually compare file extensions? If I have a folder fill of files and I want to run a command only on the png files, there seems to be no way to actually do this.

If someone posts “[[ $file == *.txt ]]” I’m going to fucking scream because THAT DOES NOT WORK. IT’S NOT VAILD BASH CODE.

  • Nomecks
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    6 months ago

    for i in ``ls *.png``; do something $i; done;

    (not formatting correctly)

    Is this sort of what you mean? You can tune the loop, but essentially you build a list of the files you want to do something against, then loop through it.

    • Korthrun
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      6 months ago

      What’s the benefit of spawning a subshell and executing “ls” here instead of just passing a glob to your loop?

      $ for lol in /usr/share/*.lm;do printf "I found a file named '%s'\n" "$lol";done
      
      I found a file named '/usr/share/out-go.lm'
      I found a file named '/usr/share/ragel.lm'
      I found a file named '/usr/share/ril.lm'
      I found a file named '/usr/share/rlhc-c.lm'
      I found a file named '/usr/share/rlhc-crack.lm'
      I found a file named '/usr/share/rlhc-csharp.lm'
      I found a file named '/usr/share/rlhc-d.lm'
      I found a file named '/usr/share/rlhc-go.lm'
      I found a file named '/usr/share/rlhc-java.lm'
      I found a file named '/usr/share/rlhc-js.lm'
      I found a file named '/usr/share/rlhc-julia.lm'
      I found a file named '/usr/share/rlhc-main.lm'
      I found a file named '/usr/share/rlhc-ocaml.lm'
      I found a file named '/usr/share/rlhc-ruby.lm'
      I found a file named '/usr/share/rlhc-rust.lm'
      
      • Nomecks
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        76 months ago

        The benefit is I get taught something new!