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This help-page, Help:Lua debugging, explains issues of writing Lua script and debugging the source code, to remove errors or improve performance. Because Lua is a "semi-compiled" interpreted language, it does not prescreen for all common syntax errors, nor detect misspelled variables, which are only found at runtime when seeing the " Script ...
Used as an example in Help:Lua debugging#To see the value of a variable without changing the code local p = {} p. Hello = 'Hello' function p. calc (num) return ...
ZeroBrane Studio provides local, remote and cross-platform debugging for applications executing Lua code. The debugger supports the following functions: step through the code, set/remove breakpoints, inspect variables and expressions using the Watch window, inspect the call stack with local values and upvalues (local values defined in the outer ...
The Canon Hack Development Kit (CHDK), an open source firmware for Canon cameras, uses Lua as one of two scripting languages. Celestia, the astronomy educational program, uses Lua as its scripting language. Cheat Engine, a memory editor/debugger, enables Lua scripts to be embedded in its "cheat table" files, and even includes a GUI designer.
Tactics for unit-tests: Now, back to unit testing, there is a tactic of self-testing in units, such as a debug-mode switch to run extra testing inside a unit, along with typical "parameter validation" which catches and reports improper data sent into the unit.
The Lua language has allowed misspelled, or uninitialized, variables to be used in a script which can eventually cause "script error" while giving no other indication of the misspelled name or invalid data.
The script at Module:LuaCall has been written to accept any set of named parameters somename=value, for each one storing the string value in the variable with the name somename, and then allowing you to use these variables as parameters for any function available in Lua.
Debugger support (with supplied debugger) Like Lua, the primary data structure in GameMonkey Script is the table. Tables allow for a variety of other data structures to be created; from arrays, sets, hashmaps, lists and records.