Try Valgrind (it’s free, open-source): The Valgrind distribution currently includes six production-quality tools: a memory error detector, two thread error detectors, a cache and branch-prediction profiler, a call-graph generating cache profiler, and a heap profiler. It also includes two experimental tools: a heap/stack/global array overrun detector, and a SimPoint basic block vector generator. It runs … Read more
This is all very simple. First, you load the Lua script without executing it. It does not matter if you have connected the Lua state with your exported functions; all you’re doing is compiling the script file. You could use luaL_loadfile, which uses C-standard library functions to read a file from disk and load it … Read more
[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
This should work exactly as you expect it to. In lua ‘==’ for string will return true if contents of the strings are equal. As it was pointed out in the comments, lua strings are interned, which means that any two strings that have the same value are actually the same string.
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).
Lua is a cool language, light-weight and extremely fast! But the point is: Is performance so important for those tasks you mentioned? Renaming a bunch of files Download some files from the web Webscraping You write those programs once, and run them once, too maybe. Why do you care about performance so much for a … Read more
You’re missing the arg vector, which has the elements you want in arg[1], arg[2], and so on: % lua -i — /dev/null one two three Lua 5.1.3 Copyright (C) 1994-2008 Lua.org, PUC-Rio > print(arg[2]) two > More info in the Lua manual section on Lua standalone (thanks Miles!).
There is no build-in math.round() function in Lua, but you can do the following: print(math.floor(a+0.5)).
Check out for srlua. It does what you need. It’s from one of the Lua authors. On this address there is also pre-compiled Windows binaries, so that would be even easier for you I think.
Awesome WM: Move window from one screen to another [closed]