string to code

[EliterScripts]

Is there a way to run code that is in a string? for example:

Code: Select all

Example_String = "DOTHIS()"
Example2_String = "DOTHAT()"
function DOTHIS()
 for i = 1, 100 do
 print("LUA IS BETTER THAN PHP!")
 end
end
function DOTHAT()
 for i = 1, 100 do
 print("this computer is wrong!")
 end
end

if php<lua then
(RUN Example_String's code)
elseif php>lua
(RUN Example2_String's code)
end

what do I do?

[ivan]

Yep, Lua has "loadstring"

Code: Select all

code_func = loadstring("return 1 + 2")
result = code_func()

Although in most cases you don't need to compile Lua code at run time,
unless you got the string from a file or from user input.

[EliterScripts]

I want to make a custom interpreter (coded purely in lua, reading more lua (sounds weird, eh?)). I want an advanced interpreter that can read an outdated file containing old game stuff, and reading out outdated LOVE2D functions, so when people choose make really cool mods, and abandon them, people can run old stuff on the new stuff. Hopefully, I can get it to where you can run new stuff on old stuff too.
EDIT: to sum it up, it's basically clearing up what I think is "minecraft's bullcrappy version handler", where new stuff can't run, and old stuff can't run, and mod developers abandon cool stuff, and people have to suck it up, and find another mod to play.

[s-ol]

I want to make a custom interpreter (coded purely in lua, reading more lua (sounds weird, eh?)). I want an advanced interpreter that can read an outdated file containing old game stuff, and reading out outdated LOVE2D functions, so when people choose make really cool mods, and abandon them, people can run old stuff on the new stuff. Hopefully, I can get it to where you can run new stuff on old stuff too.
EDIT: to sum it up, it's basically clearing up what I think is "minecraft's bullcrappy version handler", where new stuff can't run, and old stuff can't run, and mod developers abandon cool stuff, and people have to suck it up, and find another mod to play.

Why don't you just require it in setfenv?

[RBXcpmoderator12345]

loadstring and write it to a .lua file

[EliterScripts]

loadstring and write it to a .lua file

If I do that, it will have constant rewrite on the hard drive, and may cause some physical computer damage, so, trying to avoid that.

[I~=Spam]

loadstring and write it to a .lua file

If I do that, it will have constant rewrite on the hard drive, and may cause some physical computer damage, so, trying to avoid that.

That seems a bit extreme to say. How often do you want to write to the hardive? Why not just store the contents of the .lua file in a string and update the .lua file every once in a while or after so many changes?

I really don't know what you are trying to do... you descriptions in your previous posts seem to contradict so I must not be understanding you right so I am not even sure why you would even want to write so often to a particular .lua file.