__Index Example Lua at Eric Pulido blog

__Index Example Lua. Both __index and __newindex are relevant only when the index does not exist in the table. The indexing access operation table[key]. In this tutorial, you learned how to use the __index metamethod, the __newindex metamethod, and the arithmetic metamethods. When you look up a table with a key, regardless of what the key is ( t [4], t.foo,. When lua detects that w does not have the requested field, but has a metatable with an __index field, lua calls this __index. We can explicitly put in the __index method in a table and provide it the named values that we want it to return instead of nil. Remember that, when a table's metatable has a function in the. The key for this implementation is the use of a function for the metafield __index. It can contain either a function or table. The most used metatable key is most likely __index; This event happens when table is not a table or when key is not present in. For example, given your code my_tab[world], the parameters tab and key will be passed the arguments my_tab and world.

Write Your Own Lua Modules for OpenResty Applications OpenResty
from blog.openresty.com

The key for this implementation is the use of a function for the metafield __index. When lua detects that w does not have the requested field, but has a metatable with an __index field, lua calls this __index. When you look up a table with a key, regardless of what the key is ( t [4], t.foo,. Remember that, when a table's metatable has a function in the. In this tutorial, you learned how to use the __index metamethod, the __newindex metamethod, and the arithmetic metamethods. For example, given your code my_tab[world], the parameters tab and key will be passed the arguments my_tab and world. We can explicitly put in the __index method in a table and provide it the named values that we want it to return instead of nil. The indexing access operation table[key]. Both __index and __newindex are relevant only when the index does not exist in the table. The most used metatable key is most likely __index;

Write Your Own Lua Modules for OpenResty Applications OpenResty

__Index Example Lua It can contain either a function or table. We can explicitly put in the __index method in a table and provide it the named values that we want it to return instead of nil. When lua detects that w does not have the requested field, but has a metatable with an __index field, lua calls this __index. It can contain either a function or table. This event happens when table is not a table or when key is not present in. Both __index and __newindex are relevant only when the index does not exist in the table. When you look up a table with a key, regardless of what the key is ( t [4], t.foo,. The indexing access operation table[key]. The key for this implementation is the use of a function for the metafield __index. For example, given your code my_tab[world], the parameters tab and key will be passed the arguments my_tab and world. Remember that, when a table's metatable has a function in the. In this tutorial, you learned how to use the __index metamethod, the __newindex metamethod, and the arithmetic metamethods. The most used metatable key is most likely __index;

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