advent-of-code/2023/day1/day1.2.zsh

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#!/bin/zsh

paste -d '\0' \
  <(awk -f day1.2.awk $1 | tr -d a-z | rg -o '^.')   \
  <(rev $1 | awk -f day1.2.rev.awk | rev | tr -d a-z | rg -o '.$') | \
  awk 'BEGIN { sum = 0 } { sum += $0 } END { print sum }'
2023: Day 1 2023-12-01 11:02:25 +00:00			`#!/bin/zsh`

			`paste -d '\0' \`
			`<(awk -f day1.2.awk $1 \| tr -d a-z \| rg -o '^.') \`
			`<(rev $1 \| awk -f day1.2.rev.awk \| rev \| tr -d a-z \| rg -o '.$') \| \`
			`awk 'BEGIN { sum = 0 } { sum += $0 } END { print sum }'`