this post was submitted on 15 Jul 2023
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Shell Scripting

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[–] gamma 6 points 1 year ago

Here's one with a bit more context (and actually in Bash, rather than Zsh:

typeset -A any
while ((${#anys})); do
	any[${anys:0:1}]="/${anys:0:1}/!d;"
	anys=${anys:1}
done
anys=${any[*]}

Literal explanation

  • Iterate through the characters in $anys
  • For each character $c, define any[$c] to be the string /$c/!d (e.g.: any[x]='/x/!d')
  • Concatenate the values in ${any[@]}

Full contextThis is building a sed command to delete all lines which don't contain every character of the string $anys. The associative array and concatenation is to ensure I don't repeat myself when building the command. This is used in a program called dewordle, which prints all remaining words in a dictionary given the current known information in a game of wordle.