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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 ...
Debugger Assemblers Auto-complete Macros/templates Latest stable release; Fresh: EUPL and 2-clause BSD Yes Yes No Unknown No FASM: Unknown Unknown 1.73.04 / April 30, 2018 SASM: GPL: Yes Yes No Unknown Yes NASM, MASM, GAS and FASM: Yes Yes 3.10.1 / 8 October 2018 SlickEdit: Proprietary: Yes Yes Yes Solaris, Solaris SPARC, AIX, HP-UX: No
Wikipedia:Lua style guide – standards to improve the readability of code through consistency "What do converted templates look like?" (slideshow) Help:Lua debugging – a how-to guide about debugging Lua modules; Help:Lua for beginners – basic tutorial and pointers; Wikipedia:Lua string functions – string performance considerations and limits
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.
Lua is a programming language that is available via the Scribunto MediaWiki extension on the English Wikipedia. Since February 2013, Lua code can be embedded into wiki templates by employing the "{{#invoke:}}" functionality of Scribunto. This extension supports Lua 5.1 as of October 2022.
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 ...
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 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.