43 lines
1.2 KiB
Bash
43 lines
1.2 KiB
Bash
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#!/bin/bash
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#-------------------------------------------------------------------------------
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# Example 5 for Bash Tips show 17: Trimming leading or trailing parts
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#-------------------------------------------------------------------------------
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#
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# Make an indexed array of root vegetables
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#
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declare -a vegs=(celeriac artichoke asparagus parsnip mangelwurzel daikon turnip)
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printf '%s\n\n' "${vegs[*]}"
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#
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# Demonstrate some trimming
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#
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echo "1. Removing the first character:"
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echo "${vegs[@]#?}"
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echo "2. Removing characters up to and including the first vowel:"
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echo "${vegs[@]#*[aeiou]}"
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echo "3. Removing characters up to and including the last vowel:"
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printf '[%s] ' "${vegs[@]##*[aeiou]}"
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echo
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echo "4. Using an extglob pattern to remove several different leading patterns:"
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shopt -s extglob
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echo "${vegs[@]#@(cele|arti|aspa|mangel)}"
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echo "5. Removing the last character":
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echo "${vegs[@]%?}"
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echo "6. Removing from the last vowel to the end:"
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echo "${vegs[@]%[aeiou]*}"
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echo "7. Removing from the first vowel to the end:"
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printf '[%s] ' "${vegs[@]%%[aeiou]*}"
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echo
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echo "8. Using an extglob pattern to remove several different trailing patterns:"
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echo "${vegs[@]%@(iac|oke|gus|nip|zel)}"
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