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# Perl Global Substitution
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if (( $# < 2 )); then
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print "usage: $0 find replace [file ...]" >&2
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return 1
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fi
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local find="$1"
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local replace="$2"
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repeat 2 shift
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perl -i.orig -pe 's/'"$find"'/'"$replace"'/g' "$@"
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