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The string-search functions in Lua script can run extremely fast, comparing millions of characters per second. For example, a search of a 40,000-character article text, for 99 separate words (passed as 99 parameters in a template), ran within one second of Lua CPU clock time.
On Wikipedia you can use a limited version of regex called a Lua pattern to select and modify bits of text from a string. The pattern is a piece of code describing what you are looking for in the string. The symbols you an use in a pattern are: . means any individual character. ... would mean any three characters, etc. *, +, ?, and -are the ...
For example, in one go it can change the errors 'New yorker', 'New-Yorker', and 'NewYorker' into 'New Yorker'. To begin with, a pattern works like a plain string so long as it doesn't contain the special characters ^ $ () % . [] * + - ? Square brackets [ ] are used to match one single character in the string from a list of choices.
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
# is the length operator for tables and strings. array [0] = "z"-- Zero is a legal index. print (# array)-- Still prints 4, as Lua arrays are 1-based. The length of a table t is defined to be any integer index n such that t[n] is not nil and t[n+1] is nil ; moreover, if t[1] is nil , n can be zero.
Let's take a practical example. for this example, assume your user name is "Lua Developer". Let's say you want to test a bug-fix or enhancement to the String module. There are two reasons you can't do it directly: this module contains functions that are used by hundreds of templates, transcluded in millions of articles.
I mentioned the 8/4 input because current Lua source that happens to have tabs (because it was prepared somewhere else and was pasted into the edit window) should be using 8-column tabs (an example being Module:Convert/data), while someone writing a new module in the new CodeEditor will get 4-character column tabs if they press the Tab key. A ...
Project Dogwaffle Professional offers Lua scripting to make filters through the DogLua filter. Lua filters can be shared between Project Dogwaffle, GIMP , Pixarra Twistedbrush and ArtWeaver. Project Zomboid is a video game (similar to The Sims but in zombie theme) made in Java, that uses Lua for mods (expanding the game with scripting).