27 lines
603 B
Bash
27 lines
603 B
Bash
if [[ $BASH_VERSION < "4.2" ]]; then
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echo "version is too old"
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exit
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fi
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if [[ ! -v bloop ]]; then
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echo "no bloop variable"
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elif [[ $(type -t abs 2>/dev/null) != function ]]; then
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echo "abs is not a shell function"
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else
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echo $(abs $bloop)
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fi
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# need to populate the variables and use them within the same subshell in a pipeline.
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set | {
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shopt -s extglob
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int_vars=()
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while IFS='=' read -r var value; do
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if [[ $value == +([[:digit:]]) ]]; then
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int_vars+=($var)
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(( sum += value ))
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fi
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done
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echo "${int_vars[*]}"
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echo $sum
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}
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