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if ${custom} is empty then [: =: unary operator expected #117

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if ${custom} is empty then [: =: unary operator expected #117

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@demanLiu demanLiu commented Jun 16, 2016

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jwu commented Jun 20, 2016 •
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Hi @demanLiu , thanks for the PR. I can not find any document in bash about when to use [[ and the best practise for it. Would you mind to explain more about it? Thank you again.

Shyamraopolsani
Shyamraopolsani reviewed Jan 19, 2026
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@demanLiu @jwu @Shyamraopolsani