yy: String()

in src/date/dateFormatter.ts [83:104]

• 21 lines of code
• 12 McCabe index (conditional complexity)

                yy:   String(y).slice(2),
                yyyy: y,
                h:    H % 12 || 12,
                hh:   DateFormatter.pad(H % 12 || 12),
                H:    H,
                HH:   DateFormatter.pad(H),
                M:    M + 1,
                MM:   DateFormatter.pad(M + 1),
                s:    s,
                ss:   DateFormatter.pad(s),
                l:    DateFormatter.pad(L, 3),
                L:    DateFormatter.pad(L > 99 ? Math.round(L / 10) : L),
                t:    H < 12 ? "a"  : "p",
                tt:   H < 12 ? "AM" : "PM",
                T:    H < 12 ? "A"  : "P",
                TT:   H < 12 ? "AM" : "PM",
                Z:    utc ? "UTC" : (String(date).match(DateFormatter.timezone) || [""]).pop().replace(DateFormatter.timezoneClip, ""),
                o:    (o > 0 ? "-" : "+") + DateFormatter.pad(Math.floor(Math.abs(o) / 60) * 100 + Math.abs(o) % 60, 4),
                S:    ["th", "st", "nd", "rd"][d % 10 > 3 ? 0 : <any>(d % 100 - d % 10 !== 10) * d % 10]
            };

        return mask.replace(DateFormatter.token, ($0) => {