Search results
Results From The WOW.Com Content Network
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 ...
find_character(string,char) returns integer Description Returns the position of the start of the first occurrence of the character char in string. If the character is not found most of these routines return an invalid index value – -1 where indexes are 0-based, 0 where they are 1-based – or some value to be interpreted as Boolean FALSE.
Functions can return any kind of value — including a function. This is a powerful feature that can readily confuse the beginner. If you set a = mw. ustring. gmatch (text, "(.)"), the result assigned to a will be a function, not a string character!
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.
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
Marshalling data between C and Lua functions is also done using the stack. To call a Lua function, arguments are pushed onto the stack, and then the lua_call is used to call the actual function. When writing a C function to be directly called from Lua, the arguments are read from the stack. Here is an example of calling a Lua function from C:
A concatenative programming language is a point-free computer programming language in which all expressions denote functions, and the juxtaposition of expressions denotes function composition. [4] Concatenative programming replaces function application , which is common in other programming styles, with function composition as the default way ...
The primary function of a foreign function interface is to mate the semantics and calling conventions of one programming language (the host language, or the language which defines the FFI), with the semantics and conventions of another (the guest language).