{{Useful Function}}
==Sintaxe==
<syntaxhighlight lang="lua">
bool isValueInTable ( table theTable, value, int columnID )
</syntaxhighlight>

===Required arguments===
* '''theTable''': the [[table]] to check if value exist.
* '''value''': o valor a verificar.
* '''columnID''': O número da coluna dentro do [[table]].

==Returns==
This function returns a boolean value, true if the value exists in the table, false if the value does not exist in the table and ID of row to value in table.

==Code==
<section name="Function source" class="both" show="true">
<syntaxhighlight lang="lua">
function isValueInTable(theTable,value,columnID)
assert(theTable, "Bad argument 1 @ isValueInTable (table expected, got " .. type(theTable) .. ")")
local checkIsTable = type(theTable)
assert(checkIsTable == "table", "Invalid value type @ isValueInTable (table expected, got " .. checkIsTable .. ")")
assert(value, "Bad argument 2 @ isValueInTable (value expected, got " .. type(value) .. ")")
assert(columnID, "Bad argument 3 @ isValueInTable (number expected, got " .. type(columnID) .. ")")
local checkIsID = type(columnID)
assert(checkIsID == "number", "Invalid value type @ isValueInTable (number expected, got " ..checkIsID .. ")")
for i,v in ipairs (theTable) do
if v[columnID] == value then
return true,i
end
end
return false
end
</syntaxhighlight>
</section>

==Example==
<section name="Clientside example" class="client" show="true">
This example verifies if the written word does not exist within the table and then adds it to the table, otherwise a warning will be issued.
<syntaxhighlight lang="lua">
local greetingTable = {
{"Hi"},
{"Aloha"},
{"Hello"},
}

function greetingCheck(CMD,value)
local value = value or nil
local checker,id = isValueInTable(greetingTable,value,1)
if not checker then
table.insert(greetingTable,{value})
outputChatBox('('..value..')['..#greetingTable..'] added to table.')
else
outputChatBox('('..value..')['..id..'] already exist in the table.')
end
end
addCommandHandler('addgreeting',greetingCheck)
</syntaxhighlight>
</section>
'''Author: Motar2k~'''

==See also==
{{Useful_Functions}}

Template:Useful Functions

2019-03-18T02:11:34Z

Jefte: /* Traduzindo para português Brasil */

__NOTOC__
=== Table functions ===
*[[isValueInTable]] » Esta função retorna true se o valor existir na tabela, false se o valor não existir na tabela.
*[[setTableToSql]] » This function is used to save the table in the database (sql).
*[[getTableFromSql]] » This functionality is used to obtain saved tables using the function ([https://wiki.multitheftauto.com/wiki/SetTableToSql SetTableToSql ]).
*[[rangeToTable]] » This function converts a string range to a table containing number values.
*[[setTableProtected]] » This function protects a table and makes it read-only.
*[[Sort_Functions]] » These functions are able to sort your tables by a key.
*[[table.compare]] » This function checks whether two given tables are equal.
*[[table.copy]] » This function copies a whole table and all the tables in that table.
*[[table.empty]] » This function checks whether a table is empty.
*[[table.map]] » This function goes through a table and replaces every field with the return of the passed function, where the field's value is passed as first argument and optionally more arguments.
*[[table.merge]] » This function merges two or more tables together.
*[[table.random]] » This function retrieves a random value from a table.
*[[table.removeValue]] » This function removes a specified value from a table.
*[[table.size]] » This function returns the absolute size of a table.
*[[table.getRandomRows]] » This function returns random rows from table.

=== ACL functions ===
*[[aclGroupClone]] » This function clone a group to another group with/without ACLs and/or objects.
*[[getPlayerAcls]] » This function returns a table of all ACL groups on a player.
*[[isPlayerInACL]] » This function checks if a player element is in an ACL group.
*[[isPlayerStaff]] » This function checks if a player is server admin or staff.
*[[renameAclGroup]] » This function gives an existing ACL group a new name.

=== Account functions ===
*[[removeAccountData]] » This function is used to remove data from an account.
*[[getPlayerFromAccountName]] » This function is used to obtain a player by the name of his account.

=== Camera functions ===
*[[smoothMoveCamera]] » This function allows you to create a cinematic camera flight.

=== Cursor functions ===
*[[getCursorMovedOn]] » This function checks in which way the cursor is currently moving.

=== Drawing functions ===
*[[dxDrawAnimWindow]] » This function draws an animated 2D window on the screen.
*[[dxDrawBorderedRectangle]] » This is a function that will create a bordered rectangle.
*[[dxDrawBorderedText]] » This is a function that will create a bordered text.
*[[dxDrawDashedLine]] » This function draws a line with dashes.
*[[dxDrawRing]] » This function draws a ring with dx lines.
*[[dxDrawTextOnRectangle]] » Esta funcion crea un rectangle con un texto dentro.
*[[dxDrawGifImage]] » This function simulates the effect of a GIF image by using image sprites in 2D.
*[[dxDrawImage3D]] » This function draws a 3D image in GTA world.
*[[dxDrawImageOnElement]] » This function draws an image on any element.
*[[dxDrawLinedRectangle]] » This is a function that will create a rectangle outline with dx lines.
*[[dxDrawLoading]] » This function draws a loading bar on the screen.
*[[dxDrawOctagon3D]] » This function creates a 3D Octagon
*[[dxDrawPolygon]] » This function draws a custom polygon on the screen.
*[[dxDrawRectangle3D]] » This function draws a 3D rectangle in GTA world.
*[[dxDrawProgressBar]] » This function simulates a progress bar drawed using DirectDraw.
*[[dxDrawTextOnElement]] » This function draws a text on any element.
*[[dxDrawTriangle]] » This is a function that will create a triangle with dx lines.
*[[dxGetFontSizeFromHeight]] » This function calculates the font size from given height.
*[[dxGetRealFontHeight]] » This function calculates the height of a font.
*[[wordWrap]] » This function breaks a long string into a table of separate lines limited to a specific length in pixels, for drawing separately.

=== Effects functions ===
*[[attachEffect]] » This function allows you attach an effect to an element.

=== Elements functions ===
*[[getElementSpeed]] » This function returns the specified element's speed in m/s, km/h or mph.
*[[getElementsInDimension]] » This function returns a table of elements that are in the specified dimension.
*[[getElementsWithinMarker]] » This function returns a table of elements that are within a marker's collision shape.
*[[isElementInPhotograph]] » This function checks if an element is in the player's camera picture area.
*[[isElementInRange]] » This function allows you to check if an element's range to a main point is within the maximum range.
*[[isElementMoving]]» This function checks if an element is moving.
*[[isElementWithinAColShape]]» This function checks if an element is within a collision shape element.
*[[multi_check]] » This function checks one element to many, handy and clean.
*[[setElementSpeed]] » This function allows you to set the speed of an element in kph or mph units.

=== Events ===
*[[onVehicleWeaponFire]] » This code implements an event that is triggered when a player in a vehicle fires a vehicle's weapon.

=== Input functions ===
*[[bindControlKeys]] » This function allows you to bind each key bound to a control individually. Doing this bypasses a little MTA restriction.
*[[getBoundControls]] » This function returns a table of control names that are bound to the specified key.
*[[unbindControlKeys]] » This function allows you to unbind each key bound to a control individually. Use this function with [[bindControlKeys]].
*[[getClipboard]] » This event returns the contents of the clipboard by pressing ctrl + v / ctrl + V. Event triggered ONLY if cursor is showing.

=== Data functions ===
*[[byte2human]] » This function converts an integer (number of bytes) into a human-readable unit.
*[[capitalize]] » This function capitalizes a given string.
*[[convertNumber]] » This function converts and formats large numbers.
*[[convertServerTickToTimeStamp]] » This function converts server ticks to a unix timestamp.
*[[convertTextToSpeech]] » This function converts the provided text to a speech in the provided language which players can hear.
*[[findRotation]] » This function takes two points and returns the direction from point A to point B.
*[[findRotation3D]] » This function takes two sets of XYZ coordinates. It returns the 3D direction from point A to point B.
*[[FormatDate]] » This function formats a date on the basis of a format string and returns it.
*[[generateString]] » This function generates a random string with any characters.
*[[generateRandomASCIIString]] » This function returns a random string which uses ASCII characters. 
*[[getAge]] » This function calculates the age of a given birthday.
*[[getDistanceBetweenPointAndSegment2D]] » This function takes point coordinates and line (a segment) starting and ending coordinates. It returns the shortest distance between the point and the line.
*[[getEasterDate]] » This function returns easter date monthday and month for a given year.
*[[getKeyFromValueInTable]] » This function returns the key of the specified value in a table.
*[[getOffsetFromXYZ]] » This function allows you to take an entity and a position and calculate the relative offset between them accounting for rotations.
*[[getPointFromDistanceRotation]] » This function finds a point based on a starting point, direction and distance.
*[[getRealMonthH]] » This function convert english months to arabic months
*[[getRealMonthM]] » This function gives you the real months name
*[[getRGColorFromPercentage]] »This function returns two integers representing red and green colors according to the specified percentage.
*[[getScreenRotationFromWorldPosition]] » This function returns a screen relative rotation to a world position.
*[[getTimestamp]] » This function returns the UNIX timestamp of a specified date and time.
*[[isLeapYear]] » This function returns a boolean representing if a given year is a leap year.
*[[isValidMail]] » This function checks whether a provided e-mail string is valid.
*[[removeHex]] » This function is used to remove hexadecimal numbers (colors, for example) from strings.
*[[RGBToHex]] » This function returns a string representing the color in hexadecimal.
*[[secondsToTimeDesc]] » This function converts a plain seconds-integer into a user-friendly time description.
*[[string.count]] » This function counts the amount of occurences of a string in a string.
*[[string.explode]] » This function splits a string at a given separator pattern and returns a table with the pieces.
*[[switch]] » This function allows the value of a variable or expression to control the flow of program execution via a multiway branch.
*[[toHex]] » This function converts a decimal number to a hexadecimal number, as a fix to be used client-side.
*[[var dump]] » This function outputs information about one or more variables using outputConsole.
*[[wavelengthToRGBA]] » This function converts a physical wavelength of light to a RGBA color.
*[[getDistanceBetweenElements]] » Esta funcion sirve para obtener la distancia entre dos elementos.
*[[isLowerOrUpper]] »This function checks whether the letter is large or small.

=== GUI functions ===
*[[centerWindow]] » This function centers a CEGUI window element responsively in any resolution.
*[[guiMoveElement]] » This function moves guiElement by/like using moveObject.
*[[isMouseOnGUICloseButton]] » This function allows you to check whether the mouse cursor/pointer is within a gui-window's native close button.
=====Comboboxes=====
*[[guiComboBoxAdjustHeight]] » This function adjusts a CEGUI combobox element to have the correct height.
*[[guiComboBoxAddPlayersName]] » This function is add players name in combobox .

=====Gridlists=====
*[[guiGridListAddPlayers]] » This function add all online players to a grid list.
*[[guiGridListGetColumnIDFromTitle]] » This function gets a gridlist's column ID from the column title.
*[[guiGridListGetSelectedText]] » This function returns a string containing the inner text of a selected gridlist item.
*[[getGridListRowIndexFromText]] » This function returns the GridList row index from the specified text.
*[[isTextInGridList]] » This function checks if some text exist or not in the GridList.
*[[convertGridListToText]] » This function converts grid list contents to text.

=====Labels=====
*[[guiLabelAddEffect]] » This function add a effects to the gui-label like (shadow, outline).

=== Marker functions ===
*[[createMarkerAttachedTo]] » This function creates a marker that is attached to an element.

=== Math functions ===
*[[mathNumber]] » This function is a workaround for the client-side floating-point precision of 24-bits.
*[[math.hypot]] » This function returns the Hypotenuse of the triangle given by sides x and y.
*[[math.percent]] » This function returns a percentage from two number values.
*[[math.round]] » Rounds a number whereas the number of decimals to keep and the method may be set.
*[[reMap]] » Re-maps a number from one range to another.
*[[math.isPointInPolygon]] » Check if point is inside polygon or not.
*[[math.polygonArea]] » Compute area of any polygon.
*[[math.randomDiff]] » Generates a pseudo-random integer that's always different from the last random number generated.

=== Map functions ===
*[[assignLod]] » This function lets you conveniently generate and apply a LOD model to a mapping object

=== Ped functions ===
*[[getAlivePlayers (Client)|getAlivePlayers]] » This function returns a table of the alive players client-side.
*[[getAlivePlayersInTeam]] » This function returns a table of the alive players in a team.
*[[getPlayersInVehicles]] » This function returns a table of the players insides vehicles from a specified dimension.
*[[getGuestPlayers]] » This function gets a players not login or players Guest .
*[[getOnlineAdmins]] » This function returns a table of all logged-in administrators.
*[[getPedEyesPosition]] » This function allows you to get peds eyes position.
*[[getPedMaxHealth]] » This function returns a pedestrians's maximum health by converting it from their maximum health stat.
*[[getPedMaxOxygenLevel]] » This function returns a ped's maximum oxygen level by converting it from their maximum underwater stamina stat.
*[[getPlayerFromNamePart]] » This function returns a player from partial name.
*[[getPlayerFromSerial]] » This function returns a player from their serial.
*[[getPlayersByData]] » This function returns a table of players that have the specified data name.
*[[getPlayersInGroup]] » This function returns all Players In Group .
*[[getPlayersInPhotograph]] » This function returns a table of all players in photograph.
*[[isPedAiming]]» This function checks if a pedestrian is aiming their weapon.
*[[isPedAimingNearPed]] » This is similar to isPedAiming but uses a colshape to be more precise.
*[[isPedDrivingVehicle]] » This function checks if a specified pedestrian is driving a vehicle.
*[[isPlayerInTeam]] » This function checks if a player is in a specified team.

=== Player functions ===
*[[countPlayersInRange]] » This function returns the number of players that are within a certain range of the specified coordinates.

=== Resource functions ===
*[[getResourceScripts]] » This function returns a table of the resource scripts.
*[[getResourceSettings]] » This function returns a table of the resource settings.
*[[refreshResource]] » This function refreshes your resource if you changed any of the files

=== Sound functions ===
*[[isSoundFinished]] » This function checks if a sound element has finished.
*[[stopSoundSlowly]] » This function stop your sound element slowly.

=== Browser functions ===
*[[playVideo]] » This function plays a video on the screen.

=== Team functions ===
*[[getTeamFromColor]] » This function returns a team element by the specified color.
*[[getTeamWithFewestPlayers]] » This function returns a team element with least players of all the specified teams.

=== Vehicle functions ===
*[[getNearestVehicle]] » This function gets the nearest vehicle to the specified player in a specified distance.
*[[getRandomVehicle]] » This function gets a random vehicle.
*[[getValidVehicleModels]] » This function returns a table of all valid vehicle models.
*[[getVehiclesCountByType]] » This function returns the amount of vehicles by the given type as an integer value.
*[[isVehicleEmpty]] » This function checks whether a vehicle is empty.
*[[isVehicleOccupied]] » This function checks if a specified vehicle is occupied.
*[[isVehicleOnRoof]] » This function checks whether vehicle is on roof.
*[[isVehicleReversing]] » This function checks if a specified vehicle is moving backwards.
*[[setVehicleGravityPoint]] » This function sets a vehicle's gravity in the direction of a 3 dimensional coordinate with the strength specified.
*[[getVehicleTurnVelocityCenterOfMass]]» This function gets a vehicle's turn velocity relative to the vehicle's center or mass.
*[[setVehicleTurnVelocityCenterOfMass]]» This function sets a vehicle's turn velocity relative to the vehicle's center or mass.

=== Weapon functions ===
*[[getJetpackWeaponsEnabled]] » This function returns a table of enabled weapons usable on a jetpack.
*[[getPreviousAndNextWeapon]] » This function returns the next weapon and previous.

=== XML functions ===
*[[getXMLNodes]] » This function returns all children of a XML node.

=== Utility ===
*[[animate]] » This function allows you to use interpolateBetween without render event and easily used.
*[[callClientFunction]] » This function allows you to call any client-side function from the server's side.
*[[callServerFunction]] » This function allows you to call any server-side function from the client's side.
*[[Check]] » This function checks if its arguments are of the right type and calls the error-function if one is not.
*[[coroutine.resume]] » This function applies a fix for hidden coroutine error messages.
*[[getBanFromName]] » This functions returns the ban of the given playername.
*[[getCurrentFPS]] » This function returns the frames per second at which GTA: SA is running.
*[[IfElse]] » This function returns one of two values based on a boolean expression.
*[[isCursorOnElement]] » This function checks whether the cursor is in a particular area.
*[[isMouseInCircle]] » This function checks if a cursor position is in circular area or not.
*[[isMouseInPosition]] » This function allows you to check whether the mouse cursor/pointer is within a rectangular position.
*[[iterElements]] » This function returns ''a time-saving'' iterator for your for-loops.
*[[thisCommandHandlersExist]] » This method checks a string if this exist as command Handlers
*[[vector3:compare]] » This method checks whether two vectors match, with optional precision.
*[[preprocessor]] » This function allow you to use gcc macros.

<noinclude>[[Category:Useful Functions]]</noinclude>