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Lua 1.0 was designed in such a way that its object constructors, being then slightly different from the current light and flexible style, incorporated the data-description syntax of SOL (hence the name Lua: Sol meaning "Sun" in Portuguese, and Lua meaning "Moon"). Lua syntax for control structures was mostly borrowed from Modula (if, while ...
Lua patterns deliberately lack the most complex regular expression constructs (to avoid bloating the Lua code base), where many other computer languages or libraries use a more complete set. Lua patterns are not even a subset of regular expressions, as there are also discrepancies, like Lua using the escape character % instead of \, , and ...
Lua people, of Laos; Lawa people, of Thailand sometimes referred to as Lua; Lua language (disambiguation), several languages (including Lua’) Luba-Kasai language, ISO 639 code; Lai (surname) (賴), Chinese, sometimes romanised as Lua
Here are some short points about Lua, for those who already know other computer programming languages and how to program. They focus mainly upon what you might find different in Lua. Lua is dynamically typed. There's no static typing at all.
Oxford English Dictionary, Second Edition Oxford Dictionary has 273,000 headwords; 171,476 of them being in current use, 47,156 being obsolete words and around 9,500 derivative words included as subentries. The dictionary contains 157,000 combinations and derivatives, and 169,000 phrases and combinations, making a total of over 600,000 word-forms.
What you'll actually have available is documented in MW:Extension:Scribunto/Lua reference manual, which is a cut down version of the 1st Edition Lua manual that has been edited down and modified by Tim Starling to bring it more into line with the reality of Scribbling. Again, though, this is a reference manual, not a tutorial.
Scribunto Lua reference manual (Manual for the Mediawiki implementation) Programming in Lua (Official book/introduction to Lua) Lua tutorials at lua-users.org; Wiktionary:Lua on English Wiktionary: contains notes on efficiency and on dealing with Unicode and UTF-8
Lua output will not be preprocessed unless frame:preprocess() is explicitly called, meaning that template calls, parser functions, etc. in the output will not work correctly. Also, all Lua in the page is limited to 10 seconds CPU time (you can look in the source code of a rendered page to see how long a template or module took to parse).