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RE:More C coding Woes
by Earl Brannigan 06 Jul '01

06 Jul '01

> --__--__-- > Hi Dave, > Subject: [Alug] More C coding Woes > > I have some code which when compiled gives this error > > In file included from file1.c:4, > from file2.c:6: > llist.h:14: redefinition of `Node_ptr' > llist.h:14: `Node_ptr' previously declared here > llist.h:17: redefinition of `struct Node` > First thing Could be including the same file twice within the same run (pre-compiler directives should prevent this) At the top of the file llist.h is there a directive similar to : #ifndef LLIST_H #define LLIST_H if there isn't add one. At the bottom of the file you will also need a directive : #endif to close it off. This also works nicely around the include directives themselves, can spped things up on large projects since the preprocessor doesnt need to open the file and parse it before 'realising' that the file has already been installed. #ifndef FILE_H #include <file.h> #endif will protect it at the point of inclusion. HTH > > Can anyone explain what I am doing wrong. I know its something todo > with #includes and where they are in which files etc... > > Thanks > > D >

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AWK
by Ben Norcutt 06 Jul '01

06 Jul '01

Hi, After a few days head scratching I thought I'd ask this one. Basically what I want to do is this: I have 2 files one containing urls called url with each url on a new line and another containing words called keywords with each keyword on a new line I want to search the url file for each of the keywords in the keyword file and output any matches to the file output I can do this for individual keywords using awk '/word1/||/word2/||/word3/' url > output But I need a way to do it for a load of keywords. Anyone got any thoughts? Cheers, Ben

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Re: [Alug] More C coding Woes
by MJ Ray 06 Jul '01

06 Jul '01

David Freeman <david_freeman(a)rocketmail.com> writes: > When I did what you suggest above it just gives me two screenfulls of > errors from the linker. Any ideas? Well, at least it's compiling the first bit? Now you need to link against the library whose header you used... -- MJR

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Re: [Alug] More C coding Woes
by MJ Ray 06 Jul '01

06 Jul '01

David Freeman <david_freeman(a)rocketmail.com> writes: > Can anyone explain what I am doing wrong. I know its something todo > with #includes and where they are in which files etc... You're #including the same file twice? I think this is why there's often an #ifndef FOO_H\n#define FOO_H 1\n<file>#endif in them. -- MJR

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Re: [Alug] Perl arcanities
by MJ Ray 06 Jul '01

06 Jul '01

David Freeman <david_freeman(a)rocketmail.com> writes: > Have a look at where his mail is coming from, then look at the machines > it is passing through on the way, then you will see it is probably an > email server somewhere doing stupid conversions. Do any mail servers convert *to* quoted-printable? > how about (begin (display "Just another Perl hacker!") (newline)) or (display (string-append "Just another Perl hacker!" (string #\newline))) I find the second more aesthetically pleasing, but it is more to type. That said, it's easier to redirect. > OK I know I'm sad, I'll go play with Tux in a corner Kinky! -- MJR

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Encrypting disks...
by Andrew J Glover 06 Jul '01

06 Jul '01

Hi, On IRC Monday I asked a brief question about the kerneli patches, and he (? scoobz) said they had no problems... question is, before I settle on that, has anyone else had experience with that, or any other linux encryption fs? Thankyou! Andrew

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Re: [Alug] linux expo..
by MJ Ray 05 Jul '01

05 Jul '01

David Freeman <david_freeman(a)rocketmail.com> writes: > Cool, I will be up for a trip to this, who else wants to go? Ask me again nearer the time. I might even know if I still have a job then. [...] > hmmm, wonder how marching though the streets chanting Follow the > penguin will godown in birmingham? Well, it's closer to Solihull, isn't it? -- MJR

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LINUX EXPO BIRMINGHAM
by David Freeman 05 Jul '01

05 Jul '01

Neill (I think) mentioned taking a tent upto Linux expo in september, I quite like the idea, I need a holiday, I already have that week booked as leave, so, who else is interested in a) Coming to the expo for the day? b) Staying up there and having a bloody good laugh? Perhaps we could go as the ALUG, maybe with the alug T-shirts which we discussed recently on the list and at the meets? And I wont come back without a 3ft TUX! Thanks D ===== -------------------- "We all know Linux is great... it does infinite loops in 5 seconds." Linus Torvalds __________________________________________________ Do You Yahoo!? Get personalized email addresses from Yahoo! Mail http://personal.mail.yahoo.com/

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linux expo..
by Neill Newman 05 Jul '01

05 Jul '01

lo all!!! just a quick note to say that the alug/linux expo outing was good fun... I finally got to put names/email addresses to faces, which was nice ;).. I have to say that I am jealous of David Freeman, how the hell he managed to aquire a foot high fluffy pengiun I have no idea!! all I managed was an IBM football! anyway.. back to the daily grind.. Sz -- Open Source Specialists http://www.entora.co.uk/ Tel: +44 (0)701 0723686 Fax: +44 (0)870 3214368

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Re: [Alug] Perl arcanities
by Alexis Lee 05 Jul '01

05 Jul '01

perl -e 'print map chop, sort split shift, reverse shift ' 'j_' 'e._jP;_jr/_je=3D_jk{_jn*_j &_j :_j @_jr}_ja)_js$_j ~_jh]_jt,_jo+_jJ"_jr>_ju#_jt%_jl?_ja^_jc`_jh-_je|' -rjk- I actually executed this (more fool me, not knowing what the hell it did). What I find very interesting is that it printed: Just another Prl ehacker The problem is that 'quoted printable' thing again; an '=' got converted to '=3D'. Upon removing the 3D, it prints: Just another Perl hacker How's that for a resilient language! (my guess is it turned up in a regex and the regex just didn't match, but I can't be bothered to read that code). Incidentally, my $.02 on the write-only language bit; this is how I'd write the above, and I think many people would agree this bit o' Perl is a clear, well structured and elegant solution to the problem: perl -e 'print "Just another Perl hacker\n"' Show me a language clearer than that... Alexis (taking all the fun out of Perl-baiting)

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