Instead of `if [[ "${num}" -eq 42 ]]`, bash expects `if [ "${num}" -eq 42 ]` or ... | Hacker News

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		oneshtein on Nov 22, 2024 \| parent \| context \| favorite \| on: TIL: Some surprising code execution sources in bas... Instead of `if [[ "${num}" -eq 42 ]]`, bash expects `if [ "${num}" -eq 42 ]` or `if (( num==42 ))`.

tpoacher on Nov 22, 2024 | [–]

or if test $num -eq 42, which is the most sensible way to do it in my view, since it really makes the point clear that what you're really evaluating is the exit status of the evaluated command

(and where '[' is simply an alias to 'test')

jwilk on Nov 22, 2024 | [–]

"if (( num==42 ))" can exectue code from $num too.

Leynos on Nov 22, 2024 | [–]

Typeset num as an integer.

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