| 1 | #!/usr/bin/env bash
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| 2 | #
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| 3 | # Usage:
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| 4 | # ./01-char-class.sh <function name>
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| 5 |
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| 6 | set -o nounset
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| 7 | set -o pipefail
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| 8 | set -o errexit
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| 9 |
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| 10 | demo() {
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| 11 | [[ a == [a] ]]
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| 12 | [[ a != [^a] ]]
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| 13 |
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| 14 | [[ a == [ab] ]]
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| 15 | [[ a != [^ab] ]]
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| 16 |
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| 17 | [[ a == [[:alpha:]] ]]
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| 18 | [[ a != [^[:alpha:]] ]]
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| 19 | [[ 0 == [^[:alpha:]] ]]
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| 20 |
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| 21 | # NOTE: there is only one negation. You can't mix them.
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| 22 | [[ 0 == [^[:alpha:]] ]]
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| 23 |
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| 24 | if test -n "${BASH_VERSION:-}"; then
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| 25 | #echo hi
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| 26 | true
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| 27 | fi
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| 28 |
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| 29 | echo
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| 30 | echo 'ALL PASSED'
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| 31 | }
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| 32 |
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| 33 | "$@"
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