Editando Módulo:Exponential search/doc (sección)

== Examples ==

=== Jimbo's talk archives ===

[[User talk:Jimbo Wales]] has archives at [[User talk:Jimbo Wales/Archive 1]], [[User talk:Jimbo Wales/Archive 2]], ... To find the highest archive number, you would use code like this:

<syntaxhighlight lang="lua">
local expSearch = require('Module:Exponential search')
local highestArchive = expSearch(function (i)
	local archive = 'User talk:Jimbo Wales/Archive ' .. i
	return mw.title.new(archive).exists
end)
</syntaxhighlight>

=== Village pump archives ===

[[Wikipedia:Village pump (proposals)]] has old archives at [[Wikipedia:Village pump (proposals)/Archive A]], [[Wikipedia:Village pump (proposals)/Archive B]], etc. After they go through to Archive Z, the next archive is Archive AA. Although these archives aren't being updated anymore, as a demonstration we can find the highest one using this module; all we need is a function that converts from an integer to the corresponding archive name.

<syntaxhighlight lang="lua">
local expSearch = require('Module:Exponential search')

local function integerToAlpha(i)
	-- This function converts 1 to A, 2 to B, ... 26 to Z, 27 to AA, ...
	local ret = ''
	while i > 0 do
		local rem = i % 26
		if rem == 0 then
			rem = 26
		end
		local char = string.char(rem + 64) -- the "rem"th letter of the alphabet
		ret = char .. ret
		i = (i - rem) / 26
	end
	return ret
end

local function integerToArchive(i)
	return 'Wikipedia:Village pump (proposals)/Archive ' .. integerToAlpha(i)
end

local highestInteger = expSearch(function (i)
	local archive = integerToArchive(i)
	return mw.title.new(archive).exists
end)
local highestArchive = integerToArchive(highestInteger)
</syntaxhighlight>

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