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Read a blog, re understand closures and tidy up
2022-04-23 16:54:00 【The interview was rejected 10000 times】
Closures are rarely used when writing business , I didn't understand it carefully , When you see that a blog writes closure well, you can understand , Sort it out so that you can understand :
quote :https://blog.csdn.net/albertsh/article/details/82906284
print("\nexample 1:");
function counter()
local count = 0;
return function()
count = count + 1;
return count;
end
endfunc = counter();
-- The essence here is func = function() count = count + 1 return count end
-- Every call later func() They call this function
-- This is a standard counter , It is also a standard closure , in other words Lua Support such Syntax , Closure can always refer to external variables after definition , And this variable can be referenced throughout the life cycle of the return function , Add an external variable and modify this variable , The value referenced in the closure will also change
print(func());
print(func());
print(func());
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https://yzsam.com/2022/04/202204231359046607.html
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