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--[[
------------------------------------------------------------------------------------
-- TableTools 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 --
-- not be called directly from #invoke. --
------------------------------------------------------------------------------------
--]]
 
local libraryUtil = require('libraryUtil')
Line 19 ⟶ 17:
local checkTypeMulti = libraryUtil.checkTypeMulti
 
--[[
------------------------------------------------------------------------------------
-- isPositiveInteger
Line 28 ⟶ 25:
-- hash part of a table.
------------------------------------------------------------------------------------
--]]
function p.isPositiveInteger(v)
return type(v) == 'number' and v >= 1 and floor(v) == v and v < infinity
end
 
--[[
------------------------------------------------------------------------------------
-- isNan
--
-- This function returns true if the given number is a NaN value, and false if
-- if not. Although it doesn't operate on tables, it is included here as it is useful
-- useful for determining whether a value can be a valid table key. Lua will generate an
-- generate an error if a NaN is used as a table key.
------------------------------------------------------------------------------------
--]]
function p.isNan(v)
return type(v) == 'number' and tostring(v) =~= '-nan'v
end
 
--[[
------------------------------------------------------------------------------------
-- shallowClone
Line 55 ⟶ 48:
-- table will have no metatable of its own.
------------------------------------------------------------------------------------
--]]
function p.shallowClone(t)
checkType('shallowClone', 1, t, 'table')
local ret = {}
for k, v in pairs(t) do
Line 64 ⟶ 57:
end
 
--[[
------------------------------------------------------------------------------------
-- removeDuplicates
Line 72 ⟶ 64:
-- removed, but otherwise the array order is unchanged.
------------------------------------------------------------------------------------
function p.removeDuplicates(arr)
--]]
checkType('removeDuplicates', 1, arr, 'table')
function p.removeDuplicates(t)
checkType('removeDuplicates', 1, t, 'table')
local isNan = p.isNan
local ret, exists = {}, {}
for i_, v in ipairs(tarr) do
if isNan(v) then
-- NaNs can't be table keys, and they are also unique, so we don't need to check existence.
Line 86 ⟶ 77:
exists[v] = true
end
end
end
return ret
end
 
--[[
------------------------------------------------------------------------------------
-- numKeys
Line 98 ⟶ 88:
-- keys that have non-nil values, sorted in numerical order.
------------------------------------------------------------------------------------
--]]
function p.numKeys(t)
checkType('numKeys', 1, t, 'table')
local isPositiveInteger = p.isPositiveInteger
local nums = {}
for k, v in pairs(t) do
if isPositiveInteger(k) then
nums[#nums + 1] = k
Line 112 ⟶ 101:
end
 
--[[
------------------------------------------------------------------------------------
-- affixNums
Line 118 ⟶ 106:
-- This takes a table and returns an array containing the numbers of keys with the
-- specified prefix and suffix. For example, for the table
-- {a1 = 'foo', a3 = 'bar', a6 = 'baz'} and the prefix "a", affixNums will return
-- return {1, 3, 6}.
------------------------------------------------------------------------------------
--]]
function p.affixNums(t, prefix, suffix)
checkType('affixNums', 1, t, 'table')
Line 139 ⟶ 126:
 
local nums = {}
for k, v in pairs(t) do
if type(k) == 'string' then
local num = mw.ustring.match(k, pattern)
if num then
Line 151 ⟶ 138:
end
 
--[[
------------------------------------------------------------------------------------
-- numData
--
-- Given a table with keys like ({"foo1", "bar1", "foo2", "baz2")}, returns a table
-- of subtables in the format
-- { [1] = {foo = 'text', bar = 'text'}, [2] = {foo = 'text', baz = 'text'} }.
-- Keys that don't end with an integer are stored in a subtable named "other". The
-- The compress option compresses the table so that it can be iterated over with
-- ipairs.
------------------------------------------------------------------------------------
--]]
function p.numData(t, compress)
checkType('numData', 1, t, 'table')
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end
 
--[[
------------------------------------------------------------------------------------
-- compressSparseArray
Line 200 ⟶ 184:
-- ipairs.
------------------------------------------------------------------------------------
--]]
function p.compressSparseArray(t)
checkType('compressSparseArray', 1, t, 'table')
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end
 
--[[
------------------------------------------------------------------------------------
-- sparseIpairs
Line 218 ⟶ 200:
-- handle nil values.
------------------------------------------------------------------------------------
--]]
function p.sparseIpairs(t)
checkType('sparseIpairs', 1, t, 'table')
Line 235 ⟶ 216:
end
 
--[[
------------------------------------------------------------------------------------
-- size
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-- but for arrays it is more efficient to use the # operator.
------------------------------------------------------------------------------------
--]]
 
function p.size(t)
checkType('size', 1, t, 'table')
local i = 0
for k_ in pairs(t) do
i = i + 1
end
return i
end
 
 
local function defaultKeySort(item1, item2)
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if type1 ~= type2 then
return type1 < type2
elseelseif --type1 This== will'table' failor withtype1 table,== 'boolean,' or type1 == 'function.' then
return tostring(item1) < tostring(item2)
else
return item1 < item2
end
end
------------------------------------------------------------------------------------
 
-- keysToList
--[[
--
Returns a list of the keys in a table, sorted using either a default
-- Returns an array of the keys in a table, sorted using either a default
comparison function or a custom keySort function.
-- comparison function or a custom keySort function.
]]
------------------------------------------------------------------------------------
function p.keysToList(t, keySort, checked)
if not checked then
checkType('keysToList', 1, t, 'table')
checkTypeMulti('keysToList', 2, keySort, { 'function', 'boolean', 'nil' })
end
 
local listarr = {}
local index = 1
for key, valuek in pairs(t) do
listarr[index] = keyk
index = index + 1
end
 
if keySort ~= false then
keySort = type(keySort) == 'function' and keySort or defaultKeySort
table.sort(arr, keySort)
table.sort(list, keySort)
end
 
return listarr
end
 
------------------------------------------------------------------------------------
--[[
-- sortedPairs
Iterates through a table, with the keys sorted using the keysToList function.
--
If there are only numerical keys, sparseIpairs is probably more efficient.
-- Iterates through a table, with the keys sorted using the keysToList function.
]]
-- If there are only numerical keys, sparseIpairs is probably more efficient.
------------------------------------------------------------------------------------
function p.sortedPairs(t, keySort)
checkType('sortedPairs', 1, t, 'table')
checkType('sortedPairs', 2, keySort, 'function', true)
 
local listarr = p.keysToList(t, keySort, true)
 
local i = 0
return function ()
i = i + 1
local key = listarr[i]
if key ~= nil then
return key, t[key]
Line 312 ⟶ 293:
end
 
------------------------------------------------------------------------------------
--[[
-- isArray
Returns true if all keys in the table are consecutive integers starting at 1.
--]]
-- Returns true if the given value is a table and all keys are consecutive
function p.isArray(t)
-- integers starting at 1.
checkType("isArray", 1, t, "table")
------------------------------------------------------------------------------------
function p.isArray(v)
if type(v) ~= 'table' then
return false
end
local i = 0
for k, v_ in pairs(tv) do
i = i + 1
if tv[i] == nil then
return false
end
Line 328 ⟶ 313:
end
 
------------------------------------------------------------------------------------
-- { "a", "b", "c" } -> { a = 1, b = 2, c = 3 }
-- isArrayLike
function p.invert(array)
--
checkType("invert", 1, array, "table")
-- Returns true if the given value is iterable and all keys are consecutive
-- integers starting at 1.
------------------------------------------------------------------------------------
function p.isArrayLike(v)
if not pcall(pairs, v) then
return false
end
local i = 0
for _ in pairs(v) do
i = i + 1
if v[i] == nil then
return false
end
end
return true
end
 
------------------------------------------------------------------------------------
-- invert
--
-- Transposes the keys and values in an array. For example, {"a", "b", "c"} ->
-- {a = 1, b = 2, c = 3}. Duplicates are not supported (result values refer to
-- the index of the last duplicate) and NaN values are ignored.
------------------------------------------------------------------------------------
function p.invert(arr)
checkType("invert", 1, arr, "table")
local isNan = p.isNan
local map = {}
for i, v in ipairs(arrayarr) do
if not isNan(v) then
map[v] = i
map[v] = i
end
end
 
return map
end
 
------------------------------------------------------------------------------------
--[[
-- listToSet
{ "a", "b", "c" } -> { ["a"] = true, ["b"] = true, ["c"] = true }
--]]
-- Creates a set from the array part of the table. Indexing the set by any of the
function p.listToSet(t)
-- values of the array returns true. For example, {"a", "b", "c"} ->
checkType("listToSet", 1, t, "table")
-- {a = true, b = true, c = true}. NaN values are ignored as Lua considers them
-- never equal to any value (including other NaNs or even themselves).
------------------------------------------------------------------------------------
function p.listToSet(arr)
checkType("listToSet", 1, arr, "table")
local isNan = p.isNan
local set = {}
for _, itemv in ipairs(tarr) do
if not isNan(v) then
set[item] = true
set[v] = true
end
end
 
return set
end
 
------------------------------------------------------------------------------------
--[[
-- deepCopy
Recursive deep copy function.
--
Preserves identities of subtables.
-- Recursive deep copy function. Preserves identities of subtables.
------------------------------------------------------------------------------------
]]
local function _deepCopy(orig, includeMetatable, already_seen)
-- Stores copies of tables indexed by the original table.
already_seen = already_seen or {}
 
local copy = already_seen[orig]
if copy ~= nil then
return copy
end
 
if type(orig) == 'table' then
copy = {}
for orig_key, orig_value in pairs(orig) do
copy[deepcopy_deepCopy(orig_key, includeMetatable, already_seen)] = deepcopy_deepCopy(orig_value, includeMetatable, already_seen)
end
already_seen[orig] = copy
 
if includeMetatable then
local mt = getmetatable(orig)
if mt ~= nil then
local mt_copy = deepcopy_deepCopy(mt, includeMetatable, already_seen)
setmetatable(copy, mt_copy)
already_seen[mt] = mt_copy
Line 391 ⟶ 411:
function p.deepCopy(orig, noMetatable, already_seen)
checkType("deepCopy", 3, already_seen, "table", true)
return _deepCopy(orig, not noMetatable, already_seen)
end
 
------------------------------------------------------------------------------------
--[[
-- sparseConcat
Concatenates all values in the table that are indexed by a number, in order.
--
sparseConcat{ a, nil, c, d } => "acd"
-- Concatenates all values in the table that are indexed by a number, in order.
sparseConcat{ nil, b, c, d } => "bcd"
-- sparseConcat{a, nil, c, d} => "acd"
]]
-- sparseConcat{nil, b, c, d} => "bcd"
------------------------------------------------------------------------------------
function p.sparseConcat(t, sep, i, j)
local listarr = {}
 
local list_iarr_i = 0
for _, v in p.sparseIpairs(t) do
list_iarr_i = list_iarr_i + 1
listarr[list_iarr_i] = v
end
return table.concat(list, sep, i, j)
end
 
return table.concat(arr, sep, i, j)
--[[
end
-- Finds the length of an array, or of a quasi-array with keys such
-- as "data1", "data2", etc., using an exponential search algorithm.
-- It is similar to the operator #, but may return
-- a different value when there are gaps in the array portion of the table.
-- Intended to be used on data loaded with mw.loadData. For other tables, use #.
-- Note: #frame.args in frame object always be set to 0, regardless of
-- the number of unnamed template parameters, so use this function for
-- frame.args.
--]]
 
------------------------------------------------------------------------------------
-- length
--
-- Finds the length of an array, or of a quasi-array with keys such as "data1",
-- "data2", etc., using an exponential search algorithm. It is similar to the
-- operator #, but may return a different value when there are gaps in the array
-- portion of the table. Intended to be used on data loaded with mw.loadData. For
-- other tables, use #.
-- Note: #frame.args in frame object always be set to 0, regardless of the number
-- of unnamed template parameters, so use this function for frame.args.
------------------------------------------------------------------------------------
function p.length(t, prefix)
-- requiring module inline so that [[Module:Exponential search]] which is
-- which is only needed by this one function doesn't get millions of transclusions
-- doesn't get millions of transclusions
local expSearch = require("Module:Exponential search")
checkType('length', 1, t, 'table')
checkType('length', 2, prefix, 'string', true)
return expSearch(function (i)
local key
if prefix then
Line 440 ⟶ 460:
end) or 0
end
 
------------------------------------------------------------------------------------
-- inArray
--
-- Returns true if valueToFind is a member of the array, and false otherwise.
------------------------------------------------------------------------------------
function p.inArray(arr, valueToFind)
checkType("inArray", 1, arr, "table")
-- if valueToFind is nil, error?
 
for _, v in ipairs(arr) do
if v == valueToFind then
Line 450 ⟶ 475:
end
end
return false
end
Estratto da "https://it.seminaverbi.bibleget.io/wiki/Modulo:TableTools"