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On Tue, 2007-10-02 at 18:30 +0200, George Shapovalov wrote: |
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> Tuesday, 2. October 2007, Roy Marples Ви написали: |
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> > And here it is |
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> - if [[ "${FORTRANC}" = "gfortran" ]]; then |
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> + if [ "${FORTRANC}" = "gfortran" ]; then |
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> |
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> You know, it is funny to see these lines after all those cries about how [ is |
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> evil and we should really never ever use it but rather always use [[ form :). |
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> |
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> Oh, btw, does the compliant sh correctly process the most cited composition? : |
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> [ -n $foo ] && [ -z $foo ] && echo "huh?" |
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> (straight from devmanual, the primary reason why [ is considered bad) |
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|
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bash and sh do the same thing |
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roy@uberlaptop ~ $ bash -c '[ -n $foo ] && [ -z $foo ] && echo "huh?"' |
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huh? |
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roy@uberlaptop ~ $ sh -c '[ -n $foo ] && [ -z $foo ] && echo "huh?"' |
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huh? |
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|
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Maybe if you quoted properly it would work? |
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roy@uberlaptop ~ $ bash -c '[ -n "$foo" ] && [ -z "$foo" ] && echo |
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"huh?"' |
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roy@uberlaptop ~ $ sh -c '[ -n "$foo" ] && [ -z "$foo" ] && echo "huh?"' |
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|
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By golly it does work! |
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And on both shells! |
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Amazing! |
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|
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With [[ ]] you don't need to quote, which encourages people not to |
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bother learning when and when not to quote. |
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Regular readers of -dev will also notice a large amount of people not |
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quoting correctly, my view is that bash encourages this through the use |
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of [[ ]]. |
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|
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Thanks |
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|
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Roy |
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|
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-- |
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