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Removes duplicate values from an array. This function is only designed to work with standard arrays: keys that are not positive integers are ignored, as are all values after the first nil value. (For arrays containing nil values, you can use compressSparseArray first.) The function tries to preserve the order of the array: the earliest non ...
In Lua, "table" is a fundamental type that can be used either as an array (numerical index, fast) or as an associative array. The keys and values can be of any type, except nil. The following focuses on non-numerical indexes.
Arrays are tables that follow a specific convention. The numerical fields in the array start at one, and run contiguously with no "holes" with nil values in the middle of the array. p. q is syntactic sugar for p ["q"]. function p. q is syntactic sugar for p ["q"] = function. function builds a function. It doesn't declare it.
Therefore, return {mw. ustring. gmatch ("Hello world", "(.*)")} is actually a complete Lua module (though a very strange one) - it returns the function returned by mw.ustring.gmatch (an iterator function listed in the Lua reference cited above) as the one and only element in an array (represented within {})—which when executed using {{#invoke ...
In addition to support for vectorized arithmetic and relational operations, these languages also vectorize common mathematical functions such as sine. For example, if x is an array, then y = sin (x) will result in an array y whose elements are sine of the corresponding elements of the array x. Vectorized index operations are also supported.
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:
Accepts separator and conjunction arguments. local list = makeRandomList (args) local sep = makeSeparator (args. sep or args. separator) local conj = makeSeparator (args. conj or args. conjunction) return mw. text. listToText (list, sep, conj) end function l. array (args)-- Returns a Lua array, randomized.
This module includes a number of set operations for Lua tables. It currently has union, intersection and complement functions for both key/value pairs and for values only. . It is a meta-module, meant to be called from other Lua modules, and should not be called directly from #invo