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It also returns nil values as nil, to allow for distinctions between nil and false. The module also accepts other Lua structures as input, i.e. booleans, numbers, tables, and functions. If it is passed input that it does not recognise as boolean or nil, it is possible to specify a default value to return.
It also returns nil values as nil, to allow for distinctions between nil and false. The module also accepts other Lua structures as input, i.e. booleans, numbers, tables, and functions. If it is passed input that it does not recognise as boolean or nil, it is possible to specify a default value to return.
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 ...
Takes an array t with one or more nil values, and removes the nil values while preserving the order, so that the array can be safely traversed with ipairs. Any keys that are not positive integers are removed. For example, for the table {1, nil, foo = 'bar', 3, 2}, compressSparseArray will return {1, 3, 2}.
next is a global variable, not a keyword. By default, it references a function — first class objects, remember. — that does iteration over a table. # expects the array convention. If your table isn't adhering to that convention, you'll get funny results. Use nil == next (table) to check for a table being empty. When tonumber fails, it ...
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. A table literal is written as { value, key = value, [index] = value, ["non id string"] = value }. For example:
Unlike in wikicode, Lua does not use functions like #ifexpr and #expr. Add the Lua operators and functions straight into your module. Add the Lua operators and functions straight into your module. See mw:Help:Calculation for details on how #expr and mw . ext .
Lua time usage varies 1%-60% depending on busy servers: Although the Lua portion of total reformat time is more stable than markup parsing, which often varies over 200% slower (rarely over 300% slower), the Lua time clock tends to stay within ±20% of the seconds consumed. However, the Lua time usage can also vary wildly, as sometimes +30%, and ...