Module:Sandbox/trappist the monk/diff time explained

require('strict');

local lang_object = mw.getContentLanguage;

--diff_days|||precision=}}where and are date/time strings acceptable to the MediaWiki #time parser

local function diff_days (frame) local t1 = frame.args[1]; -- t1 is 'start' time local t2 = frame.args[2]; -- t2 is 'end' time local precision = tonumber (frame.args.precision) or 3; -- number of decimal places to show; default is 3 if 0 > precision then return '

invalid precision: ' .. precision .. ''; end

local good; local time1, time2; -- to hold Unix time stamps representing the dates

good, time1 = pcall (lang_object.formatDate, lang_object, 'U', t1); -- convert t1 value to unix timestamp if not good then return '

invalid time: ' .. t1 .. ''; end

good, time2 = pcall (lang_object.formatDate, lang_object, 'U', t2); -- convert t2 value to unix timestamp if not good then return '

invalid time: ' .. t2 .. ''; end

return string.format ('%.'.. precision .. 'f', (time2 - time1)/86400);end

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return