How to solve treesitter/highlighter: Error executing lua problem in neovim config
I had a similar issue. I ran :TSUpdate in Neovim to update Treesitter plugin and the error message disapear after relaunching.
lua
Lua’s package management system?
There is no standard Lua package management system, but you can try out the following: LuaRocks – contains a rather large number of Lua modules distributed as rocks. Once LuaRocks is installed, the installation is simple: luarocks install desired-package. On Linux/Unix/Mac, this will install into /usr/local/{share,lib}/lua/5.1, where the Lua interpreter looks for modules. LuaDist – … Read more
table.getn is deprecated – How can I get the length of an array?
Use #: > a = {10, 11, 12, 13} > print(#a) 4 Notice however that the length operator # does not work with tables that are not arrays, it only counts the number of elements in the array part (with indices 1, 2, 3 etc.). This won’t work: > a = {1, 2, [5] = … Read more
How to remove spaces from a string in Lua?
It works, you just have to assign the actual result/return value. Use one of the following variations: str = str:gsub(“%s+”, “”) str = string.gsub(str, “%s+”, “”) I use %s+ as there’s no point in replacing an empty match (i.e. there’s no space). This just doesn’t make any sense, so I look for at least one … Read more
How do you cleanly exit interactive Lua?
There is no quit keyword. Try control-D in Unix, control-Z in Windows or os.exit() if you must.
Easiest way to make lua script wait/pause/sleep/block for a few seconds?
[I was going to post this as a comment on John Cromartie’s post, but didn’t realize you couldn’t use formatting in a comment.] I agree. Dropping it to a shell with os.execute() will definitely work but in general making shell calls is expensive. Wrapping some C code will be much quicker at run-time. In C/C++ … Read more
How to get list of directories in Lua
I hate having to install libraries (especially those that want me to use installer packages to install them). If you’re looking for a clean solution for a directory listing on an absolute path in Lua, look no further. Building on the answer that sylvanaar provided, I created a function that returns an array of all … Read more
current line number in Lua
From Lua using debug.getinfo, e.g., local line = debug.getinfo(1).currentline From C using lua_getinfo (This will return the linenumber inside lua code) lua_Debug ar; lua_getstack(L, 1, &ar); lua_getinfo(L, “nSl”, &ar); int line = ar.currentline http://www.lua.org/manual/5.1/manual.html#lua_getinfo http://www.lua.org/manual/5.1/manual.html#pdf-debug.getinfo
Check if array contains specific value
Lua doesn’t have strict arrays like other languages – it only has hash tables. Tables in Lua are considered array-like when their indices are numerical and densely packed, leaving no gaps. The indices in the following table would be 1, 2, 3, 4. local t = {‘a’, ‘b’, ‘c’, ‘d’} When you have an array-like … Read more
Lua need to split at comma
Try this str=”cat,dog” for word in string.gmatch(str, ‘([^,]+)’) do print(word) end ‘[^,]’ means “everything but the comma, the + sign means “one or more characters”. The parenthesis create a capture (not really needed in this case).