Timeline for How can I declare and use Boolean variables in a shell script?
Current License: CC BY-SA 4.0
4 events
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| Mar 5 at 22:05 | comment | added | vbwx |
I prefer this way as well. It has the advantage that these "faux booleans" can be used in different ways with Bash. If $bool is set to either 1 or a null string, ((bool)) works just like [[ $bool ]], which is the same as [[ -n $bool ]]. To test for a false value, ((! bool)) is equal to [[ ! $bool ]]. It can even be used for parameter expansion such as echo "${bool:+This variable is true}". The values 0 and 1 do not provide this much flexibility.
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| Mar 20, 2021 at 22:15 | history | edited | yolenoyer | CC BY-SA 4.0 |
added 108 characters in body
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| Mar 20, 2021 at 21:59 | history | edited | yolenoyer | CC BY-SA 4.0 |
added 2 characters in body
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| Mar 20, 2021 at 17:41 | history | answered | yolenoyer | CC BY-SA 4.0 |