Difference between revisions of "Module:TableTools"
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en>Mr. Stradivarius m (grammar) |
en>Mr. Stradivarius (add a fancy introductory comment) |
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-- This module includes a number of functions | --[[ | ||
------------------------------------------------------------------------------------ | |||
-- TableTools -- | |||
-- -- | |||
-- This module includes a number of functions for dealing with Lua tables. -- | |||
-- It is a meta-module, meant to be called from other Lua modules, and should -- | |||
-- not be called directly from #invoke. -- | |||
------------------------------------------------------------------------------------ | |||
--]] | |||
local p = {} | local p = {} | ||
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--[[ | --[[ | ||
----------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------ | ||
-- isPositiveInteger | -- isPositiveInteger | ||
-- | -- | ||
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-- useful for determining whether a given table key is in the array part or the | -- useful for determining whether a given table key is in the array part or the | ||
-- hash part of a table. | -- hash part of a table. | ||
----------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------ | ||
--]] | --]] | ||
function p.isPositiveInteger(num) | function p.isPositiveInteger(num) | ||
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--[[ | --[[ | ||
----------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------ | ||
-- getNumKeys | -- getNumKeys | ||
-- | -- | ||
-- This takes a table and returns an array containing the numbers of any numerical | -- This takes a table and returns an array containing the numbers of any numerical | ||
-- keys that have non-nil values, sorted in numerical order. | -- keys that have non-nil values, sorted in numerical order. | ||
----------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------ | ||
--]] | --]] | ||
function p.getNumKeys(t) | function p.getNumKeys(t) | ||
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--[[ | --[[ | ||
----------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------ | ||
-- getAffixNums | -- getAffixNums | ||
-- | -- | ||
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-- {a1 = 'foo', a3 = 'bar', a6 = 'baz'} and the prefix "a", getAffixNums will | -- {a1 = 'foo', a3 = 'bar', a6 = 'baz'} and the prefix "a", getAffixNums will | ||
-- return {1, 3, 6}. | -- return {1, 3, 6}. | ||
----------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------ | ||
--]] | --]] | ||
function p.getAffixNums(t, prefix, suffix) | function p.getAffixNums(t, prefix, suffix) | ||
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--[[ | --[[ | ||
----------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------ | ||
-- compressSparseArray | -- compressSparseArray | ||
-- | -- | ||
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-- while preserving the order, so that the array can be safely traversed with | -- while preserving the order, so that the array can be safely traversed with | ||
-- ipairs. | -- ipairs. | ||
----------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------ | ||
--]] | --]] | ||
function p.compressSparseArray(t) | function p.compressSparseArray(t) | ||
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--[[ | --[[ | ||
----------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------ | ||
-- sparseIpairs | -- sparseIpairs | ||
-- | -- | ||
-- This is an iterator for sparse arrays. It can be used like ipairs, but can | -- This is an iterator for sparse arrays. It can be used like ipairs, but can | ||
-- handle nil values. | -- handle nil values. | ||
----------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------ | ||
--]] | --]] | ||
function p.sparseIpairs(t) | function p.sparseIpairs(t) | ||