[ILUG] [TOTD] find error corresponding to number

[Chris Higgins]

On Sat, 08 May 2004 16:24:05 +0100
P at draigBrady.com wrote:

> Nice try. The hard bit is finding the appropriate header files.
> I'm now down to 60 bytes. It's beginning to look like Perl though.
> 
> #!/bin/sh
> echo|cpp -includeerrno.h -dD|egrep -w "E[^ ]+ *$1"

The contents of your echo go unused by cpp, so all you
really need is a command that generates some output
and creates an EOF for stdin.. 

How about 

w|cpp -includeerrno.h -dD|egrep -w "E[^ ]+ *$1"

and you don't *really* need the #!/bin/sh, just
having it executable should do you nicely.. 

Which makes it 49 bytes ( if you include the ^M
at the end of the line :-)

And your *$1, isn't really making much difference
either. 

luggage:~> cat t.sh 
w|cpp -includeerrno.h -dD|egrep -w "E[^ ]+ *$1"
luggage:~> ./t.sh | wc
    126     378    2468

luggage:~> cat t.sh 
w|cpp -includeerrno.h -dD|egrep -w "E[^ ]+"
luggage:~> ./t.sh | wc 
    126     378    2468


Which makes it 43 ( if you don't count the ^M at the end ),
were we counting the ^M ? 

Can't you replace the "E[^ ]+" with E.+  ( no spaces, no quotes )

Which ( not counting the ^M ) gives 38 chars ? 


:-)

( Now - I have to say that I missed the start of
this thread, so I could just have killed some functionality,
but all my tests give the same answer for the last one
w|cpp -includeerrno.h -dD|egrep -w E.+
as to the first one :-)


--
Chris Higgins                              Cisco Learning Partner
Darach Technology Ltd                      tel: +353-1-6204370
email: chris.higgins at darach.ie          fax: +353-1-6204371
http://www.darach.ie

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