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Additionally it costs almost nothing to run a cat, but some mental work to remember which programs are built to prevent it (accept filename argument). If they a

Additionally it costs almost nothing to run a cat, but some mental work to remember which programs are built to prevent it (accept filename argument). If they are one can pass /proc/self/fd/0 as filename... That's some mindless tinkering that works so universally that it's just practical

ithkuil 4y ago
You can reduce the cognitive overhead by using this pattern: Before: <input.txt sed ... | awk ... After: <input.txt grep bar | sed ... | awk .. Every new pipeline stage is just "command args |" and you insert it after the end of a previous command, treating the initial input redirect as the end of zeroth command
- Izkata 4y ago
  ...that increases the mental overhead because now there's no delimiter between the first and second part of the pipeline.
  - ithkuil 4y ago
    in zsh you can do this: <input.txt | grep bar | sed ... | awk .. but not in bash
deleted 4y ago
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