Adding ith helper.

Author: mirek

ith.js

@@ -0,0 +1,22 @@
+
+/**
+ * Returns ordinal number as `1st`, `2nd` etc. string.
+ *
+ * @param {number} value
+ * @return {string}
+ */
+function ith(value) {
+  const ones = value % 10
+  const tens = Math.floor(value / 10) % 10
+  if (tens === 1) {
+    return `${value}th`
+  }
+  switch (ones) {
+    case 1: return `${value}st`
+    case 2: return `${value}nd`
+    case 3: return `${value}rd`
+  }
+  return `${value}th`
+}
+
+module.exports = ith