Module:palindromes

Hello, you have come here looking for the meaning of the word Module:palindromes. In DICTIOUS you will not only get to know all the dictionary meanings for the word Module:palindromes, but we will also tell you about its etymology, its characteristics and you will know how to say Module:palindromes in singular and plural. Everything you need to know about the word Module:palindromes you have here. The definition of the word Module:palindromes will help you to be more precise and correct when speaking or writing your texts. Knowing the definition ofModule:palindromes, as well as those of other words, enriches your vocabulary and provides you with more and better linguistic resources.
The following documentation is located at Module:palindromes/documentation.
Useful links: subpage list • links • transclusions • testcases • sandbox
This module needs documentation.
Please document this module by describing its purpose and usage on the documentation page. 

local export = {}

local data = mw.loadData("Module:palindromes/data")

local function ignoreCharacters(term, lang, sc, langdata)
	term = mw.ustring.lower(term)
	term = mw.ustring.gsub(term, "", "")
	
	-- Language-specific substitutions

	-- Ignore entire scripts (e.g. romaji in Japanese)
	if langdata.ignore then
		sc_name = sc and sc:getCode() or lang:findBestScript(term):getCode()
		for _, script in ipairs(langdata.ignore) do
			if script == sc_name then
				return ""
			end
		end
	end
	
	for i, from in ipairs(langdata.from or {}) do
		term = mw.ustring.gsub(term, from, langdata.to or "")
	end
	
	return term
end

function export.is_palindrome(term, lang, sc)
	local langdata = data or data or {}

	-- Affixes aren't palindromes
	if mw.ustring.find(term, "^%-") or mw.ustring.find(term, "%-$") then
		return false
	end
	
	-- Remove punctuation and casing
	term = ignoreCharacters(term, lang, sc, langdata)
	local len = mw.ustring.len(term)
	
	if langdata.allow_repeated_char then
		-- Ignore single-character terms
		if len < 2 then
			return false
		end
	else
		-- Ignore terms that consist of just one character repeated
		-- This also excludes terms consisting of fewer than 3 characters
		if term == mw.ustring.rep(mw.ustring.sub(term, 1, 1), len) then
			return false
		end
	end
	
	local charlist = {}
	
	for c in mw.ustring.gmatch(term, ".") do
		table.insert(charlist, c)
	end
	
	for i = 1, math.floor(len / 2) do
        if charlist ~= charlist then
        	return false
        end
    end
    
    return true
end

return export
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