Module:TableTools: Difference between revisions

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--]]
--]]
function p.isPositiveInteger(v)
function p.isPositiveInteger(v)
return type(v) == 'number' and v >= 1 and floor(v) == v and v < infinity
if type(v) == 'number' and v >= 1 and floor(v) == v and v < infinity then
return true
else
return false
end
end
end


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--]]
--]]
function p.isNan(v)
function p.isNan(v)
return type(v) == 'number' and tostring(v) == '-nan'
if type(v) == 'number' and tostring(v) == '-nan' then
return true
else
return false
end
end
end


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--[[
--[[
-- Finds the length of an array, or of a quasi-array with keys such
-- This returns the length of a table, or the first integer key n counting from
-- as "data1", "data2", etc., using an exponental search algorithm.  
-- 1 such that t[n + 1] is nil. It is similar to the operator #, but may return
-- It is similar to the operator #, but may return
-- a different value when there are gaps in the array portion of the table.
-- 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 #.
-- Intended to be used on data loaded with mw.loadData. For other tables, use #.
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-- frame.args.
-- frame.args.
--]]
--]]
function p.length(t)
local i = 1
while t[i] ~= nil do
i = i + 1
end
return i - 1
end


function p.length(t, prefix)
-- requiring module inline so that [[Module:Exponental search]]
-- which is only needed by this one function
-- 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
key = prefix .. tostring(i)
else
key = i
end
return t[key] ~= nil
end) or 0
end
function p.inArray(arr, valueToFind)
function p.inArray(arr, valueToFind)
checkType("inArray", 1, arr, "table")
checkType("inArray", 1, arr, "table")
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