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| ==Introduction==
| | #redirect [[Methods]] |
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| Methods are functions which belong to a particular object. Although standard Lua doesn't have them, they're a major focus of Roblox Lua.
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| Methods act like a function stored within an object. The method itself is accessed in the same way a Function in a Table is accessed. However, a special property of methods changes how they are called.
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| These two codes call the same function (a) with the same parameters (b).
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| <pre>b.a(b)
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| b:a()
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| </pre>
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| The second is more brief and concise. Methods can increase typing speed, because there is less need to retype variable names.
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| Methods may or may not return data.
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| ==Examples==
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| All instances (possibly excluding) some core services, have the remove method, along with the clone method.
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| Sounds have the Play method and the Stop method.
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| ==Making your own==
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| Making your own methods can
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| *Make your code look cool
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| *Make your tables more dynamic
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| {{EmphasisBox|This tutorial-like section assumes you have a good knowledge of table terminology and functions.}}
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| First, we need a table to ''apply'' the method to. I'm going to make a checkbox (It doesn't actually DO anything, but it's an application example. Feel free to make this work)
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| <pre>
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| Checkbox = {
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| ["Checked"] = false,
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| ["CheckedImage"] = "Image",
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| ["UncheckedImage"] = "Image",
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| ["ImageButton"] = .,
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| ["ChangeState"] = function(s)
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| s.Checked = not s.Checked
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| end
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| }
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| Checkbox.ImageButton.MouseButton1Down:connect(function()
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| Checkbox:ChangeState()
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| end)
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| </pre>
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| As you can see, rather than just typing
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| <pre>
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| Checkbox.ImageButton.MouseButton1Down:connect(Checkbox.ChangeState)
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| </pre>
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| I made it call it as you'd call a method.
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| When you call a function as a method, you automatically pass an argument as the TABLE ITSELF. For example,
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| <pre>
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| function ReturnTable(Num)
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| return {
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| Num,
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| function PrintNum(s)
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| print(s.Num)
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| end
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| }
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| end
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| Tabl = ReturnTable(5)
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| Tabl:PrintNum()
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| </pre>
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| That will output 5 because we passed in the table, so the function will receive the table it's located in. Because we called it as a method, it passed "Tabl" as an argument. You can do it with a dot, but it looks kind of stupid:
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| <pre>
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| Tabl.PrintNum(Tabl)
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| </pre>
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