Can anybody learn how to code? Post: 302905217

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The Lounge What is on Your Mind? Can anybody learn how to code? Post 302905217 by bakunin on Tuesday 10th of June 2014 10:14:44 AM

06-10-2014

Registered User

Quote:

Originally Posted by rbatte1

banunkin, Do you mean the "If those foreigners don't understand, just shout louder" brigade?

Not exactly. What i mean is the "i want everything in a foreign land to be exactly like i am used to at home" - which begs the question "why go to a foreign land in first place". I live in Frankfurt/Main right now. At the corner there is a nice little italian restaurant i like to visit for dinner. The restaurant is run by a married couple: she - doing the service - is speaking some odd mixture of german and italian, which passes for "cute". He (the cook) is speaking no german at all. They have 3 daughters, all married to italians, they talk only in italian, they never spend their vacation anywhere else than Italy (precisely, they say "at home"), albeit already living for 25 years in Germany, etc..

I couldn't spend my life that way. I know not a single word of japanese, but if i would be forced to live in Japan, I'd try to speak japanese as fluently as possible. I would not dine exclusively in austrian restaurants and i would clothe myself like the japanese people do. If this includes kimonoes or something else foreign to me, then so be it.

It is the same with programming languages. For instance: of course it is possible to use C-like pointer structures in PASCAL - it is just cumbersome, inefficient and PASCAL is not really made to use memory like that. Of course it is possible to program around FORTRAN math functions (in fact i had to maintain such a program once - i still have nightmares from that) in a bid to outperform them: it is highly improbably, though, to succeed and there is a good chance to just produce tons of unreadable, unmaintainable and outright shitty code.

There are some tenets every programmer, regardless of his toolset should observe: simplicity, encapsulation, proper indentation, well-defined interfaces, .... But then, there are some innate strategies, structures, ways to deal with certain problems special to every programming language. One can argue if object orientation is a good programming paradigma or not - but if you think it is not, then you should not use Oberon or Modula 2 but stick to PASCAL, even if it is not well suited for large software projects. But I'd prefer to debug a well-written PASCAL-program over a poorly-written Oberon-program.

bakunin

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LEARN ABOUT ULTRIX

getpriority

getpriority(2)							System Calls Manual						    getpriority(2)

Name
       getpriority, setpriority - get or set program scheduling priority

Syntax
       #include <sys/time.h>
       #include <sys/resource.h>

       #define PRIO_PROCESS	0    /* process */
       #define PRIO_PGRP	1    /* process group */
       #define PRIO_USER	2    /* user id */

       prio = getpriority(which, who)
       int prio, which, who;

       setpriority(which, who, prio)
       int which, who, prio;

Description
       The  scheduling	priority of the process, process group, or user, as indicated by which and who, is obtained with the call and set with the
       call.  The which is one of PRIO_PROCESS, PRIO_PGRP, or PRIO_USER, and who is interpreted  relative  to  which  (a  process  identifier  for
       PRIO_PROCESS,  process  group  identifier  for  PRIO_PGRP,  and a user ID for PRIO_USER).  The prio is a value in the range -20 to 20.  The
       default priority is 0; lower priorities cause more favorable scheduling.

       The call returns the highest priority (lowest numerical value) enjoyed by any of the specified processes.  The call sets the priorities	of
       all of the specified processes to the specified value.  Only the superuser may lower priorities.

Return Values
       Since can legitimately return the value -1, it is necessary to clear the external variable errno prior to the call, then check it afterward
       to determine if a -1 is an error or a legitimate value.	The call returns 0 if there is no error or -1 if there is.

Diagnostics
       The and system calls fail under the following conditions:

       [ESRCH]	      No processes were located using the which and who values specified.

       [EINVAL]       The which was not one of PRIO_PROCESS, PRIO_PGRP, or PRIO_USER.

       In addition to the errors indicated above, setpriority can fail under the following conditions:

       [EPERM]	      A process was located, but neither its effective nor real user ID matched the effective user ID of the caller.

       [EACCES]       A user other than the superuser attempted to change a process priority to a negative value.

See Also
       nice(1), fork(2), renice(8)

																    getpriority(2)