2020年11月18日 · What does the ~= operator mean in Lua? For example, in the following code: if x ~= params then

2012年1月24日 · To anyone with the same sort of doubts about lua's syntax, i'd recommend checking the documentation here and keeping it handy. It'll be useful while learning. It'll be useful while learning. if-statement

2015年1月16日 · From the docs:. The operator and returns its first argument if it is false; otherwise, it returns its second argument.

In general, if you want a switch statement in Lua, what you ought to be doing is building a table. For your simple case of choice that could be 1, 2, or fail, a simple if statement with a few conditions is sufficient. For more complex cases, a table of functions should be employed:

2016年1月2日 · ipairs is a Lua standard function that iterates over a list. This style of for loop, the iterator for loop, uses this kind of iterator function. The i value is the index of the entry in the array. The name value is the value at that index. So it basically does a lot of grunt work for you.

The Lua idiom for this case is something like this: function listvalues(s) local t = { } for k,v in ipairs(s) do t[#t+1] = tostring(v) end return table.concat(t,"\n") end By collecting the strings to be concatenated in an array t , the standard library routine table.concat can be used to concatenate them all up (along with a separator string ...

2009年12月7日 · The Lua Reference says: The format string follows the same rules as the printf family of standard C functions. The only differences are that the options/modifiers *, l, L, n, p, and h are not supported and that there is an extra option, q.

2013年8月5日 · Note also that wxLua interpreter (latest wxLua stable release) runs with a version of Lua 5.1, so try not to use features of Lua 5.2 in your scripts. Basic Lua syntax and semantics is almost the same, but there are some slight differences and Lua 5.2 has a couple of added features. So be careful with your learning path.

2024年5月20日 · If you are splitting a string in Lua, you should try the string.gmatch() or string.sub() methods. Use the string.sub() method if you know the index you wish to split the string at, or use the string.gmatch() if you will parse the string to find the location to split the string at. Example using string.gmatch() from Lua 5.1 Reference Manual:

2010年12月1日 · A userdata is a garbage-collected value of an arbitrary size and content. You create one from the C API, with lua_newuserdata(), which creates and pushes it on the stack and gives you a pointer to its content to initialize as you see fit from C.