[Eoussama]

Quote:

Originally Posted by GaByM TIL this: This isn't quite good because sizeof() doesn't work on this strings but it is still interesting.

sizeof() counts characters and stops when it reaches the null terminator (0, '\0', EOS)

[GaByM]

Quote:

Originally Posted by Eoussama sizeof() counts characters and stops when it reaches the null terminator (0, '\0', EOS)

No, strlen returns the amount of characters inside a string and stops at '\0'. sizeof() returns the size of the array, so

Код:

str[128] = "Hello"; printf("%i", sizeof(str)); //will print 128

[Spmn]

You should never append to (or even edit) string literals. You will go out of bounds and most likely rewrite other literals.

[Dayrion]

Quote:

Originally Posted by GaByM TIL this: You now can use strcat with a constant string (idk if i'm correct for this name) passed as parameter. A better example: This isn't quite good because sizeof() doesn't work on this strings but it is still interesting.

It can be easily bypassed.

PHP код:

FunctionGetActorTextLabel(text[], length = sizeof(text))
{
    strcat("YEA ->", text, length);
    print(text);
} 


[Freaksken]

TIL you can ignore parameters passed by reference (out parameters) by using a default value, just like you can with parameters passed by value (in parameters):

Код:

stock Float:DoSomething(playerid, &Float:a = 4.0) {
	a = 5.0;
	return 9.0;
}

The default value can be anything, since it will be ignored anyway.

Use:

Код:

DoSomething(0); //Returns 9.0

new Float:a;
DoSomething(0, a); //Returns 9.0 and variable 'a' contains 5.0

[ISmokezU]

Quote:

Originally Posted by Freaksken TIL you can ignore parameters passed by reference (out parameters) by using a default value, just like you can with parameters passed by value (in parameters): Код: stock Float:DoSomething(playerid, &Float:a = 4.0) { a = 5.0; return 9.0; } The default value can be anything, since it will be ignored anyway. Use: Код: DoSomething(0); //Returns 9.0 new Float:a; DoSomething(0, a); //Returns 9.0 and variable 'a' contains 5.0

Great find!

Would expect a tag mismatch with this, but this is great.

[PepsiCola23]

today i learned that there is not necessary to use

PHP код:

stock 


in your gamemode.

for example,instead of

PHP код:

stock GetTruckNeedTracks(playerid)
{
    new truckneedtracks;
    new truckskill = GetPlayerTruckSkill(playerid);
    if(truckskill == 1) truckneedtracks = 35;
    else if(truckskill == 2) truckneedtracks = 100;
    else if(truckskill == 3) truckneedtracks = 220;
    else if(truckskill == 4) truckneedtracks = 450;
    return truckneedtracks;
} 


you can simply write

PHP код:

GetTruckNeedTracks(playerid)
{
    new truckneedtracks;
    new truckskill = GetPlayerTruckSkill(playerid);
    if(truckskill == 1) truckneedtracks = 35;
    else if(truckskill == 2) truckneedtracks = 100;
    else if(truckskill == 3) truckneedtracks = 220;
    else if(truckskill == 4) truckneedtracks = 450;
    return truckneedtracks;
} 


[Dayrion]

Quote:

Originally Posted by PepsiCola23 ... you can simply write PHP код: GetTruckNeedTracks(playerid) {     new truckneedtracks;     new truckskill = GetPlayerTruckSkill(playerid);     if(truckskill == 1) truckneedtracks = 35;     else if(truckskill == 2) truckneedtracks = 100;     else if(truckskill == 3) truckneedtracks = 220;     else if(truckskill == 4) truckneedtracks = 450;     return truckneedtracks; }

There is quick tutorial to explain when you can use the keyword stock: http://forum.sa-mp.com/showpost.php?...16&postcount=1
Now, you can learn something new. It's called "switch case" statement (« tutorial here!).

PHP код:

GetTruckNeedTracks(playerid)
{
    new truckneedtracks;
    new truckskill = GetPlayerTruckSkill(playerid);
    if(truckskill == 1) truckneedtracks = 35;
    else if(truckskill == 2) truckneedtracks = 100;
    else if(truckskill == 3) truckneedtracks = 220;
    else if(truckskill == 4) truckneedtracks = 450;
    return truckneedtracks;
} 


Become (with some tiny optimisations)

PHP код:

GetTruckNeedTracks(playerid)
{
    switch(GetPlayerTruckSkill(playerid))
    {
        case 1: return 35;
        case 2: return 100;
        case 3: return 220;
        case 4: return 450; 
    }
    return 0;
} 


[PepsiCola23]

Quote:

Originally Posted by Dayrion There is quick tutorial to explain when you can use the keyword stock: http://forum.sa-mp.com/showpost.php?...16&postcount=1 Now, you can learn something new. It's called "switch case" statement (« tutorial here!). PHP код: GetTruckNeedTracks(playerid) {     new truckneedtracks;     new truckskill = GetPlayerTruckSkill(playerid);     if(truckskill == 1) truckneedtracks = 35;     else if(truckskill == 2) truckneedtracks = 100;     else if(truckskill == 3) truckneedtracks = 220;     else if(truckskill == 4) truckneedtracks = 450;     return truckneedtracks; }  Become (with some tiny optimisations) PHP код: GetTruckNeedTracks(playerid) {     switch(GetPlayerTruckSkill(playerid))     {         case 1: return 35;         case 2: return 100;         case 3: return 220;         case 4: return 450;      }     return 0; }

Thanks you,i ll try using this method

[Eoussama]

Today I learned about a simple BATCH instruction that serves as a cool hack when testing/debugging.

1- First, open any text editor, and paste the following instructions

PHP код:

@echo off
:s
samp-server.exe
goto s 


2- Save the file as “something.bat”
3- Run the .bat file

Now, whenever you change your code source and compile, no need to exit and re-execute your samp-server.exe, just type the exit command in the console, and it will automatically close and re-open it for you.

[rfr]

Quote:

Originally Posted by Eoussama Today I learned about a simple BATCH instruction that serves as a cool hack when testing/debugging. 1- First, open any text editor, and paste the following instructions PHP код: @echo off :s samp-server.exe goto s  2- Save the file as “something.bat” 3- Run the .bat file Now, whenever you change your code source and compile, no need to exit and re-execute your samp-server.exe, just type the exit command in the console, and it will automatically close and re-open it for you.

can't you write gmx on the console?

[Gforcez]

Quote:

Originally Posted by rfr can't you write gmx on the console?

That restarts the gamemode, not the entire server.

[Mobtiesgangsa]

today i learned.... what means strtok

basicly strtok means

str - is a string == 1
tok - is a token == 2

strtok(const string[], &index)

1. its porpuse is to fetch textual declaration like the callback know as 'OnPlayerCommandText' with the parameters (playerid, cmdtext[])

2. tokes porpuse is to check indexe's or the given parameter of 'playerid'

here on the given example will show you how its done

example code:

Код:

public OnPlayerCommandText(playerid, cmdtext[])
{
        new cmd[256+1], index;

        cmd = strtok(cmdtext, index);

        if(strcmp(cmd, "/info", true : false, 5)) < bool either its true or false
        {
                return true, false; < either it returns true or false
        }
        return false;
}

[GaByM]

TIL that you can split a macro on multiple lines with '\'

PHP код:

#define add(%0,%1) ((%0)+(%1))
main()
{
    printf("%i",
        
        add(\
            5\
            ,\
            6\
            )
        );
} 


[Eoussama]

Quote:

Originally Posted by GaByM TIL that you can split a macro on multiple lines with '\' PHP код: #define add(%0,%1) ((%0)+(%1)) main() {     printf("%i",                  add(\             5\             ,\             6\             )         ); }

not only macros but literally anything, as far as I know, correct me if I'm wrong!

[Freaksken]

TIL you can specify a variable width or precision by using an asterisk.

Код:

Width:
printf("%5d", 10);			//prints '   10'
printf("%*d", 5, 10);			//prints '   10'

printf("%5f", 3.1415926535);		//prints '    3.141592'
printf("%*f", 5, 3.1415926535);		//prints '    3.141592'

Precision:
printf("%.5f", 3.1415926535);		//prints '3.14159'
printf("%.*f", 5, 3.1415926535);	//prints '3.14159'

printf("%.5s", "abcdefghi");		//prints 'abcde'
printf("%.*s", 5, "abcdefghi");		//prints 'abcde'

This is useful in situations where you don't want to hardcode those values.

[Y_Less]

YIL the internal buffer for formatting floating point numbers is 64 characters:

PHP код:

    new str[256];
    format(str, sizeof (str), "%7.0100f", 4.4);
    print(str);
    printf("%7.0100f", 4.4); 


Should give numbers with 100 decimal places (mostly all zeros), but doesn't:

Код:

      4.40000009536743164062500000000000000000000000000000000000
      4.40000009536743164062500000000000000000000000000000000000

Edit:

I'll also expand on what Freaksken said (I didn't learn this today, I wrote the original code for it). You can combine variable width and precision, plus zero prefixes:

PHP код:

printf("%0*.*f", 3, 5, 4.4); // Gives "004.40000" 


Even better, this can totally replace "substring" code:

PHP код:

new str[] = "How are you?"
printf("%.3s", str[4]); // Gives "are" 


[kurta999]

Quote:

Originally Posted by Y_Less YIL the internal buffer for formatting floating point numbers is 64 characters: PHP код:     new str[256];     format(str, sizeof (str), "%7.0100f", 4.4);     print(str);     printf("%7.0100f", 4.4);  Should give numbers with 100 decimal places (mostly all zeros), but doesn't: Код: 4.40000009536743164062500000000000000000000000000000000000 4.40000009536743164062500000000000000000000000000000000000 Edit: I'll also expand on what Freaksken said (I didn't learn this today, I wrote the original code for it). You can combine variable width and precision, plus zero prefixes: PHP код: printf("%0*.*f", 3, 5, 4.4); // Gives "004.40000"  Even better, this can totally replace "substring" code: PHP код: new str[] = "How are you?" printf("%.3s", str[4]); // Gives "are"

The latest example does work with sprintf in C?

[Y_Less]

I have no idea sorry. As I said, the "*" functionality is something I added to SA:MP's format when I was a dev. Test it and make your own TIL post!

[coool]

Today I learnt that:

PHP код:

new array[][] = {12,13};
printf("%i", array); 


will output 8.