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| Ternary Operator Basics |
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Posted by: RhaegarX - 2021-01-20, 07:29 PM - Forum: Tutorials
- Replies (4)
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"Sorry for the bad English, I'm using the translator to do this tutorial."
- What is a ternary operator?
In various situations in programming we need to deal with various scenarios, through conditional structures, such as if, else and switch. However, in some situations we deal with wave situations there are only 2 possible returns.
For example, let's imagine a hypothetical situation, in which if the player is an administrator he wins $ 1500, otherwise he will win $ 500.
We can do this logic using the if and else operator:
PHP Code: if (PlayerData[playerid][pAdmin] > 0)
{? ? ? ? ?
? ? GivePlayerMoney(playerid, 1500);
}
else
{
? ? GivePlayerMoney(playerid, 500);
}
Now notice that we are making a relatively long structure for a simple action, with only two possibilities. Is there no other way to write this code in a simpler way? Yes, there is, and that is what the ternary operator is for:
PHP Code: GivePlayerMoney(playerid, (PlayerData[playerid][pAdmin] > 0 ? 1500 : 500));
Now we did the same action with just one line of code, however let's understand a little bit about how to build a ternary operator.
- How to build a ternary operator?
Building a ternary operator is simple, its own structure is self-explanatory.
PHP Code: (condition ? value if true : value if false)
To better understand, we can see that the '?' acts as an if and the ':' acts as the else.
- In what situations will I use the ternary operator?
This is a relative question, it depends a lot on the type of logic that you will build for your system, but as stated in the first question we will use the ternary operator for situations in which there are only 2 possibilities of return. Remembering that the ternary operator is not limited to returning only number values, but can also return strings and other options.
Example of a string with a ternary operator:
PHP Code: SendClientMessage(playerid, -1, (playerData[playerid][pAdmin] > 0 ? "True" : "false"));
- Problems with ternary operator
The main problem with the ternary operator is its structure, which because it is very compact, its structure can be difficult to read by programmers who are not used to it.
- End
This is my first personal authoring tutorial, i hope you like it and criticism will always be welcome!
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| TSConnector and some other fce |
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Posted by: Ardenis - 2021-01-20, 06:46 PM - Forum: Pawn Scripting
- Replies (1)
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Hey there
the TS_PokeClient function does not work correctly. When someone joins the game, they poke them ?
let's look at the code
Code: public TSC_OnClientConnect (clientid, nickname [])
{
new str[50];
format(str, sizeof(str), "> %s (%d) has join to our ts3 server", nickname, clientid);
SendClientMessageToAll(-1, str);
TSC_SendClientMessage(clientid, "Yup, here it works");
TSC_PokeClient(clientid, "Welcome"); // But not here, it not poke him but idk why
return 1;
}
http://prntscr.com/xb40i1
https://github.com/maddinat0r/samp-tsconnector/releases
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| Divide by zero |
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Posted by: Zow - 2021-01-20, 06:02 PM - Forum: Pawn Scripting
- Replies (1)
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Code: ExpProgress(playerid)
{
? ? new Float:exp = playerData[playerid][pExp]*100/PlayerRequiredExp(playerid);
? ? return exp;
}
PlayerRequiredExp(playerid)
{
? ? new requiredexp = playerData[playerid][pLevel] * 2000;
return requiredexp;
}
pExp are always start from 0 when you're level up
So crashdetect always give me this?Run time error 11: "Divide by zero"
I need some idea how to get pass this one
I just want to popup exp to % but I need pExp to start by 0 when level up
Is that possible?
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| Why my code only sends "else"? |
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Posted by: sampaux - 2021-01-20, 12:50 PM - Forum: Pawn Scripting
- Replies (1)
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Code: for(new i = 0;i < 100;i)
{
if(PlayerInfo[i][cargo] != 0)
{
? ? GameTextForPlayer(i, "~r~Novo Report!", 3000, 5);
? ? GetPlayerName(id, reportado, sizeof(reportado));
? ? GetPlayerName(playerid, reportador, sizeof(reportador));
? ? format(report, sizeof(report), "Nick e id: %s [%d]\nMotivo: %s\nReportado por: %s", reportado, id, motivo, reportador);
? ? SendClientMessage(i, -1, "====={4291ff}Novo Report{FFFFFF}=====");
? ? SendClientMessage(i, -1, report);
}
else
{
SendClientMessage(i, -1, "asdadsadad");//I put it?in else?to prove that code only sends else
}
this code is a /report command. PlayerInfo[][cargo] == Admin level
despite my PlayerInfo[][cargo] != 0 in?game, this code keep sending the else,? considering?PlayerInfo[][cargo] == 0
Basically, it sends "?SendClientMessage(i, -1, "asdadsadad"); " for all online admins instead of the fist code,?and this is not what should happen
Fix it?is easy, obviously just invert?the codes.?But i want know WHY THIS OCCURS???
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| Tutorials |
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Posted by: RhaegarX - 2021-01-20, 11:33 AM - Forum: General Discussions
- Replies (2)
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Hi guys, I was browsing the pages of sampforumarchiv reviewing some topics, and then I thought about re-posting some tutorials and includes the old samp forum (with due credit to each creator) to be able to move the community more and help those who are new and there's nowhere to go. What do you think of the idea?
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| ??????? ?? ?????? ???. ??????? |
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Posted by: Silicium - 2021-01-20, 08:45 AM - Forum: Russian/???????
- Replies (1)
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???????????.
??? ??? ????? ????? ????? ?????, ? ????? burgershot'a ????????? ? open.mp, ??????? ? ???? ??????? ???? ??? ?????? ??????? sa:mp, ?? ???? ???? ???????? ?? ?????? ???????? ???. ???????:
????? ?? ???-????? ??? ???????? ????? ?? ?????? ?-?? "????????? ???????"???? ???????????
P.s. ?????? ??????? ??? ?????? "???????" ?????. ??, ????? ?????, ????? ?? ??? ???? ?????? ?????????.
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[Help] - Park vehicle cmd issues |
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Posted by: Disretired - 2021-01-20, 12:15 AM - Forum: Pawn Scripting
- Replies (4)
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Hello all, myself and a group of friends are working on a server and have noticed an issue with our park vehicle command.
The command only parks the car in Virtual World 0, we wanted to do dynamic garages, but when we /park in a garage with another VW other then 0 the car disappears and is parked in the VW 0 instead of the VW the garage is set too.
I've attached the command below if anyone can point out the issue, this is the command we had when we first started the project, I myself am still getting the hang of pawn so not sure what the problem is that's causing it to only park in VW 0.
Code: CMD:park(playerid, params[])
{
if(PlayerInfo[playerid][pAdmin] >= 1 || PlayerInfo[playerid][pHelper] >= 2 || PlayerInfo[playerid][pDonateRank] == 5)
{
new playerpark;
if(!sscanf(params, "i", playerpark))
{
for(new d = 0; d < MAX_PLAYERVEHICLES; d)
{
if(IsPlayerInVehicle(playerid, PlayerVehicleInfo[playerpark][d][pvId]))
{
new Float:x, Float:y, Float:z, Float:angle, Float:health;
GetVehicleHealth(PlayerVehicleInfo[playerpark][d][pvId], health);
if(PlayerInfo[playerpark][pLockCar] == GetPlayerVehicleID(playerid)) PlayerInfo[playerpark][pLockCar] = INVALID_VEHICLE_ID;
GetVehiclePos(PlayerVehicleInfo[playerpark][d][pvId], x, y, z);
GetVehicleZAngle(PlayerVehicleInfo[playerpark][d][pvId], angle);
SurfingCheck(GetPlayerVehicleID(playerid));
UpdatePlayerVehicleParkPosition(playerpark, d, x, y, z, angle, health);
PutPlayerInVehicle(playerid, PlayerVehicleInfo[playerpark][d][pvId], 0);
SetPlayerArmedWeapon(playerid, 0);
new string[30 (MAX_PLAYER_NAME * 2)];
format(string, sizeof(string), "* %s has parked %s's vehicle for them.", GetPlayerNameEx(playerid), GetPlayerNameEx(playerpark));
new szMessage[128];
format(szMessage, sizeof(szMessage), "AdmCmd: %s has parked %s's vehicle for them", GetPlayerNameEx(playerid), GetPlayerNameEx(playerpark));
ABroadCast(COLOR_LIGHTRED,szMessage, 2);
ProxDetector(30.0, playerid, string, COLOR_PURPLE,COLOR_PURPLE,COLOR_PURPLE,COLOR_PURPLE,COLOR_PURPLE);
return 1;
}
}
SendClientMessageEx(playerid, COLOR_GRAD1, "You need to be in a player owned vehicle");
}
else
SendClientMessageEx(playerid, COLOR_WHITE, "USAGE: /park <playerid>");
}
else
SendClientMessageEx(playerid, COLOR_GRAD1, "Park is now an moderator command to combat abuse. /requesthelp or /am to an admin to get a car parked at your house.");
return 1;
}
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