Lua indexes tables from 1, unlike C, Java etc. which indexes arrays from 0. That means, that in your table, the valid indexes are: 1, 2, 3, 4. What you are looking for is the following: print( myTable[ math.random( #myTable ) ] ) When called with one argument, math.random(n) returns a random integer from 1 … Read more
Nope. No difference, except that you can enclose the other inside the ones that you are using. — No difference between these myStr = “Hi!!” myStr=”Hi!!” myStr = [[Hi!!]] — The ‘weird’ way to make a string literal IMO… — Double quotes enclosed in single quotes myStr=”My friend said: “Hi!!”” — Single quotes enclosed in … Read more
Use math.fmod(x,y) which does what you want: Returns the remainder of the division of x by y that rounds the quotient towards zero. http://www.lua.org/manual/5.2/manual.html#pdf-math.fmod
The correct way to write this is either local t = { foo = 1, bar = 2} Or, if the keys in your table are not legal identifiers: local t = { [“one key”] = 1, [“another key”] = 2}
Translate all of the Lua source code files to object files and put them in a static library: for f in *.lua; do luajit -b $f `basename $f .lua`.o done ar rcus libmyluafiles.a *.o Then link the libmyluafiles.a library into your main program using -Wl,–whole-archive -lmyluafiles -Wl,–no-whole-archive -Wl,-E. This line forces the linker to include … Read more
As you can see in Strings tutorial there is a special [===[ syntax for nesting square braces. You can use it in block comments too. Just note, that number of = signs must be the same in open and close sequence. For example 5 equals will work. –[=====[ for k,v in pairs(t) do local d … Read more
I know this question is seven years old, but Lua 5.4 finally brings const to the developers! local a <const> = 42 a = 100500 Will produce an error: lua: tmp.lua:2: attempt to assign to const variable ‘a’ Docs: https://www.lua.org/manual/5.4/manual.html#3.3.7.
I experimented with both the # operator and table.getn(). I thought table.getn() would do what you wanted but as it turns out it’s returning the same value as #, namely 0. It appears that dictionaries insert nil placeholders as necessary. Looping over the keys and counting them seems like the only way to get the … Read more
You’re right, this is one of the ways to do it. It would only not work and throw errors if your “String” variable is not a string. Personally, i usually prefer to use something like.. myString = string.lower(myString) But its really the same as doing myString = myString:lower() assuming that myString is actually a string, … Read more
the ~= is not equals It is the equivalent in other languages of !=