On Jun 8 2007 01:06, Oleg Verych wrote:
>- empty lines in the end of file (patches can't be handled, or can? :).
Yes it can.
>Body -- is a commented sed script with shell variables for source/patch
>handling switch and compatibility with other versions of sed, not only GNU.
>If you like more tabs, then i stated in whitespace damage, just use
>"unexpand".
sed just does not cut it anymore. Perl regexes win in the long term.
>> Yes, UNIX was designed to handle fork-exec efficiently, thank God. But
>> still.
>[]
>> > efforts to remove bashizms...
>>
>> I prefer bashisms over using a shell [referring to original sh or ksh]
>> that can't do a sane thing.
>
>I would like to know cases. Just to try to solve them.
>
>Two from my head are:
>
>- `set pipefail' option -- not problem at all [0]
>- arrays.
>
>Arrays. Well, that depends. My option is as follows.
If you need arrays or a lot of substr magic, well, it's perhaps time to
consider a switch to a scripted language (perl, python, php, whatever comes
around). But I really meant these handy bash features:
for i in {1..5}; do ...; done;
if [ ]; then ...; fi;
echo $[ math expr ];
echo `backtick` and $(backtick with dollar-parentheses);
The possibility to say if [ "$any" == "" ] (not having to use
crap like [ "x$any" == "x" ].
The possibility to say if [ -z "$any" ]
On the other hand, if you wanted to extinguish bashisms, then you'd
also need to do so for kshisms like
if [[ ]]
>OK, to not to go offtopic, i would say here, that if that temp file on the
>tmpfs, then Linux directly helps you with its efficient memory
>management, not libc (good addition to fork/clone-execve, isn't it? ;)
And don't assume everything is a UNIX. CreateProcess() is particularly
expensive on Windows, burdening even Cygwin's fork()/exec() emulation.
Jan
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