What does Metamethod mean?

Meta-method is the study of the epistemological soundness of the existing research, as well as the ways the methodological applications may have influenced the findings that are generated.

What is a metatable Roblox?

More formally, you can think of a metatable, as a normal table that holds configurations/settings for another table that let’s you change the behaviour of that other table. In short, metatables help add more functionalities to a table. The idea behind metatables is, to make tables a more powerful object!

What is a Metamethod in Lua?

A metatable is a table that helps in modifying the behavior of a table it is attached to with the help of a key set and related meta methods. These meta methods are powerful Lua functionality that enables features like − Changing/adding functionalities to operators on tables.

What is Rawset?

rawset (table, index, value) : Sets the real value of table[index] to value, without invoking any metamethod. table must be a table, index any value different from nil, and value any Lua value.

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When to use only one of the metamethods?

Now only one of the metamethods will be called with any of the comparison operators. For example, we can improve the example at the top of the page like this: __metatable is for protecting metatables. If you do not want a program to change the contents of a metatable, you set its __metatable field.

When do you Call A metamethod on a fallback table?

If a fallback table is used, remember that it can trigger an __index metamethod on it if it has one, so you can create long chains of fallback tables. This metamethod is called when you try to assign to a key in a table, and that key doesn’t exist (contains nil). If the key exists, the metamethod is not triggered.

When do metamethods occur in a Lua table?

A metatable is a regular Lua table containing a set of metamethods, which are associated with events in Lua. Events occur when Lua executes certain operations, like addition, string concatenation, comparisons etc.

When do events occur in A metamethod function?

Events occur when Lua executes certain operations, like addition, string concatenation, comparisons etc. Metamethods are regular Lua functions which are called when a specific event occurs. The events have names like “add” and “concat” (see manual section 2.8) which correspond with string keys in the metatable like ” __add ” and ” __concat “.