Here you can find the source of toOrdinal()
Number.prototype.toOrdinal = function() { var s = ['th','st','nd','rd']; var v = this%100; return this + (s[(v-20)%10]||s[v]||s[0]); };
Number.prototype.toOrdinal = function() { var n = this % 100; var suffix = ["th", "st", "nd", "rd", "th"]; var ord = n < 21 ? (n < 4 ? suffix[n] : suffix[0]) : (n % 10 > 4 ? suffix[0] : suffix[n % 10]); return this + ord; };
Number.prototype.toOrdinal = function() { var n = this % 100, suffix = ['th', 'st', 'nd', 'rd', 'th'], ord = n < 21 ? (n < 4 ? suffix[n] : suffix[0]) : (n % 10 > 4 ? suffix[0] : suffix[n % 10]); return this + ord; };
Number.prototype.toOrdinal = function() { var n, s = ["th","st","nd","rd"], v = n % 100; return n + (s[(v - 20) % 10] || s[v] || s[0]); };