Create 1507-reformat-date.js

Author: everthis

1507-reformat-date.js

@@ -0,0 +1,14 @@
+/**
+ * @param {string} date
+ * @return {string}
+ */
+const reformatDate = function(date) {
+  const months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"];
+  const map = new Map();
+  for (let i = 0; i < months.length; ++i) {
+    map.set(months[i], (i + 1 < 10 ? "0" : "") + (i+1));    
+  }
+  const parts = date.split(" "); 
+  const day = (parts[0].length == 3 ? "0" : "") + parts[0].slice(0, parts[0].length - 2);
+  return parts[2] + "-" + map.get(parts[1]) + "-" + day;  
+};