Add solution #1507

Author: JoshCrozier

README.md

@@ -177,6 +177,7 @@
 1493|[Longest Subarray of 1's After Deleting One Element](./1493-longest-subarray-of-1s-after-deleting-one-element.js)|Medium|
 1496|[Path Crossing](./1496-path-crossing.js)|Easy|
 1502|[Can Make Arithmetic Progression From Sequence](./1502-can-make-arithmetic-progression-from-sequence.js)|Easy|
+1507|[Reformat Date](./1507-reformat-date.js)|Easy|
 1598|[Crawler Log Folder](./1598-crawler-log-folder.js)|Easy|
 1780|[Check if Number is a Sum of Powers of Three](./1780-check-if-number-is-a-sum-of-powers-of-three.js)|Medium|
 1880|[Check if Word Equals Summation of Two Words](./1880-check-if-word-equals-summation-of-two-words.js)|Easy|

solutions/1507-reformat-date.js

@@ -0,0 +1,24 @@
+/**
+ * 1507. Reformat Date
+ * https://leetcode.com/problems/reformat-date/
+ * Difficulty: Easy
+ *
+ * Given a date string in the form Day Month Year, where:
+ * - Day is in the set {"1st", "2nd", "3rd", "4th", ..., "30th", "31st"}.
+ * - Month is in the set {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"}.
+ * - Year is in the range [1900, 2100].
+ *
+ * Convert the date string to the format YYYY-MM-DD, where:
+ * - YYYY denotes the 4 digit year.
+ * - MM denotes the 2 digit month.
+ * - DD denotes the 2 digit day.
+ */
+
+/**
+ * @param {string} date
+ * @return {string}
+ */
+var reformatDate = function(date) {
+  const [_, day, month, year] = date.match(/(\d+)\w+\s+(\w+)\s+(\d+)/);
+  return new Date(`${day} ${month} ${year}`).toISOString().split('T')[0];
+};