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What does operator ~= mean in Lua? - Stack Overflow
WEBNov 18, 2020 — The operator ~= is exactly the negation of equality (==). See docs. edited Jan 19, 2018 at 20:49. answered Jan 11, 2016 at 2:14. pushkin. 10.1k 16 61 106. 1. thanks a lot for pointing to the docs pushkin - for some reason googling ~= did not work for me. But now that I see the code, it makes a lot of sense.
Stackoverflow.comLua operators, why isn't +=, -= and so on defined?
WEBNov 20, 2013 — lua doesn't actually have any statement or line separators in the grammar. Whitespace is ignored and there are no mandatory semicolons. You can do: io.write("one") io.write("two") Or: io.write("one") io.write("two") And lua is equally happy with both. Keeping a grammar like that unambiguous is tricky.
Stackoverflow.comif statement - How to check if a value is equal or not equal to one …
WEBMar 25, 2024 — Because control structures in lua only consider nil and false to be false, and anything else to be true, this will always enter the if statement, which is not what you want either. There is no way that you can use binary operators like those provided in programming languages to compare a single variable to a list of values.
Stackoverflow.comLua - if statement with two conditions on the same variable?
WEBJan 24, 2012 — 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
Stackoverflow.comfunction - Difference between . and : in Lua - Stack Overflow
WEBBasically dot syntax like object.method(object,args) retrieves object twice, while object:method(arg) retrieves object only once. If object is a global, upvalue or table field, then : is faster than .. . is never faster than :.
Stackoverflow.comInline conditions in Lua (a == b ? "yes" : "no")? - Stack Overflow
WEBApr 2, 2011 — This is because each and every table has it's own independent metatable and lua does not allow you to modify all tables at once. In our case, an easy solution would be to convert the table into a boolean using the not not trick: print((not not {}) (true, false)) -- Prints 'true'. edited Apr 3, 2021 at 19:12.
Stackoverflow.comSplit string in Lua - Stack Overflow
WEBIf 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:
Stackoverflow.comLua: Rounding numbers and then truncate - Stack Overflow
WEBAug 19, 2013 — The lua-magic values must come after all those pre-processing steps, else precision-loss may occur. And finally, restore original sign of input. The 2 "multiplies" are simply low-overhead sign-flipping. sign-flips 4 times for originally negative values (2 manual flips and round-trip to end of mantissa), while any x >= 0 , including that of -0.0, only flips …
Stackoverflow.comif statement - if, else, else if and end Lua - Stack Overflow
WEBMay 2, 2012 — Piezas = Cuadrado2. else if Rotacion == 3 then --this is Line 273. Piezas = Cuadrado3. else if Rotacion == 4 then. Piezas = Cuadrado4. else. io.write("Me Envio una rotacion que no existe? \n"); end. --this end closes the if inside the first if the one using to compare Rotacion.
Stackoverflow.comConcatenation of strings in Lua - Stack Overflow
WEBThe 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 between each pair) without …
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