The Big Programming Thread - Page 881

On May 15 2017 18:21 Manit0u wrote:
http://www.2-spyware.com/remove-nginx-virus.html

Wow. Just wow...

On May 15 2017 05:39 phar wrote:
Don't sweat it too much. While various areas of math (linear algebra/graph theory/combinatorics/etc) are important for certain fields of software (e.g. networking, graphics, maybe some parts of compiler/ast crap, etc), it's not gonna tank your career if you're not great at it or anything. Lot of fully competent software people who don't have good math chops.

For this assignment, you will write the code of two C functions called
setjmp and longjmp which will allow a program to transfer control directly
from one function to another without returning to the function that called them.
These two functions are available in the standard library but here you will write your own version.

All code must be written in C.
The following are not allowed:
-Assembly language instructions
-Using asm capabilities of gcc
-Calling builtin functions of gcc such as __builtin_return_address and __builtin_frame_address

main()
{
int r;
r=setjmp(r);
if(r==0)
{
fun1();
return(0);
}
 else
 {
 print_str("error\n");
 return(2);
 }
 }
setjmp (v)
int v;
 {
 /*
 .....
 */
 return(0);
 }
longjmp (v)
int v;
 {
 /*
 .....
 */
 return(1);
 }
fun1 ()
 {
 print_str("start fun1\n");
 fun2();
 return(0);
 }
fun2 ()
 {
 int d;
 print_str("start fun2\n");
 longjmp(d);
 return(0);
 }

On May 16 2017 08:54 Nesserev wrote:
First of all, format the code in a way so that an actual human can parse it.

That said... is this a real copy/paste code example?

The code makes no sense, uses no proper function prototyping, setjmp and longjmp clearly work very differently and are improperly used, wtf is this?

setjmp (v) int v; { ... }

Is this some archaic C dialect, what's going on?

On May 15 2017 23:11 travis wrote:
Unfortunately what I want to do seems to require decently high math knowledge, with linear algebra definitely being important. I actually won't be sad if it turns out I failed the class, it will be a chance to take it again and redeem myself.

On May 15 2017 23:11 travis wrote:
Clearly my study habits were off. It's hard when I am running solo though, since I live so far from the school I don't have people to study with. I honestly should have just followed the MIT open courseware class instead of my own class. I went through the essence of linear algebra videos someone posted in this thread and they were great, but it only helps so much, because those are short so they aren't particularly comprehensive.

If i did pass, I take "applications of linear algebra" in the fall, so I'll study some more this summer and then use that class as an opportunity to get real good at it.

On May 15 2017 23:11 travis wrote:
I don't really know what my problem is with these math classes. I always thought I was good at math, but I guess there is a big difference between being good at doing elementary operations in my head and understanding concepts.

On May 15 2017 23:11 travis wrote:
At least I am doing well in this discrete math class, which most of my peers say is one of the hardest classes a CS student takes here (which is not my experience at all - I feel like it's way overhyped). My final in that is tomorrow. Studying all day today! then I am done for the semester.

On May 16 2017 08:54 Nesserev wrote:
First of all, format the code in a way so that an actual human can parse it.

That said... is this a real copy/paste code example?

The code makes no sense, uses no proper function prototyping, setjmp and longjmp clearly work very differently and are improperly used, wtf is this?

setjmp (v) int v; { ... }

Is this some archaic C dialect, what's going on?

#include <stdio.h>

int setjmp(int v);
int longjmp(int v);
int fun1(void);
int fun2(void);

int main(void)
{
    int r = setjmp(r);

    if (r != 0)
    {
        printf("error\n");

        return 2;
    }

    fun1();

    return 0;
 }

int setjmp(int v)
{
    /*
     ...
    */
    return 0;
}

int longjmp(int v)
{
    /*
     ...
    */
    return 1;
}

int fun1(void)
{
    printf("start fun1\n");

    fun2();

    return 0;
 }

int fun2(void)
{
    int d;

    printf("start fun2\n");

    longjmp(d);

    return 0;
}

On May 16 2017 11:15 phar wrote:
Also incidentally, turns out that a phd in physics actually DOES yield gainful employment... on wall street (wut?).

On May 17 2017 01:45 Artesimo wrote:
I got a somewhat programming related question. I know that you use excel to create tables in a database as well to create excel tables from a database, I am unsure though to what extend.
Would I be able to some extend retrieve data in a similar capacity to SQL-Queries, without having the person using the excel sheet having to deal with the SQL. Of course I would have to write the needed SQL-statements at some point, the whole idea is that the person using this wouldn't have to deal with it. I intend to create this for some people that can handle excel but not SQL so they can profit from a database.
Something along the lines of:
+ Show Spoiler +

Especially for the **-part I couldn't really find any info, most stuff I found dealt exclusively with retrieving/feeding whole tables into databases. Input Mask and select Mask doesn’t have to be in the same excel sheet ofc.

So far the process they use is their data comes in an excel table, they then would use the sort function to sort by one table and then look by hand for what they are looking. For my example, they would let excel sort the table by quantity/color and then check for the other attribute by hand/search function. Of course their excel sheets are a lot bigger and they have to search for more than just 2 attributes. I also know that it would probably be a lot easier (for me) to simply write a small tool, but after a lot of consideration and evaluating, excel+DB seems to be the best/most realistic solution for the people who will use it afterwards.

On May 17 2017 03:13 supereddie wrote:
Excel has a Data ribbontab, with External Data and other options that will allow you to specify a database connection (ODBC for example) to retrieve data form a database.

In general however, you don't want Excel writing to the database (and especially not dropping and creating tables). Create a simple import task in the database instead.