Module:Yesno

    From Nonbinary Wiki

    Documentation for this module may be created at Module:Yesno/doc

    -- Function allowing for consistent treatment of boolean-like wikitext input.
    -- It works similarly to the template {{yesno}}.
    
    return function (val, default)
    	-- If your wiki uses non-ascii characters for any of "yes", "no", etc., you
    	-- should replace "val:lower()" with "mw.ustring.lower(val)" in the
    	-- following line.
    	val = type(val) == 'string' and val:lower() or val
    	if val == nil then
    		return nil
    	elseif val == true 
    		or val == 'yes'
    		or val == 'y'
    		or val == 'true'
    		or val == 't'
    		or val == 'on'
    		or tonumber(val) == 1
    	then
    		return true
    	elseif val == false
    		or val == 'no'
    		or val == 'n'
    		or val == 'false'
    		or val == 'f'
    		or val == 'off'
    		or tonumber(val) == 0
    	then
    		return false
    	else
    		return default
    	end
    end