On 11/11/2014 11:45 PM, Marcin Zajączkowski wrote:
> Hello again,
>
> Another question related to fish scripting. How can I set a value to a
> variable to be able to use it in `if`?
>
> if test $myBool
> ...
> end
This should work (at least in my slightly outdated version of fish)!
What it tests is if $mybool is empty:
> if test $myBool; echo yes; else; echo no; end
no
> set myBool 0
> if test $myBool; echo yes; else; echo no; end
yes
Interestingly,
> set myBool ' ' # i.e., a space
> if test $myBool; echo yes; else; echo no; end
yes
A trick that I sometimes use in “other shells” is
$ myBool=true
$ if $myBool; then echo yes; else echo no; fi
yes
$ myBool=false
$ if $myBool; then echo yes; else echo no; fi
no
In this case, note that
$ unset myBool
$ if $myBool; then echo yes; else echo no; fi
yes
This does not work in fish because variables cannot be used as commands.
You would have to use ‘alias’ / ‘function’.
Elias
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