Added JS 1143 Longest Common Subsequence

Author: anthonysim

javascript/1143-Longest-Common-Subsequence.js

@@ -0,0 +1,18 @@
+var longestCommonSubsequence = function (text1, text2) {
+  let m = text1.length;
+  let n = text2.length;
+
+  let table = new Array(m + 1).fill().map(() => new Array(n + 1).fill(0));
+
+  for (let i = 1; i <= m; i++) {
+    for (let j = 1; j <= n; j++) {
+      if (text1.charAt(i - 1) !== text2.charAt(j - 1)) {
+
+        table[i][j] = Math.max(table[i - 1][j], table[i][j - 1]);
+      } else {
+        table[i][j] = table[i - 1][j - 1] + 1;
+      }
+    }
+  }
+  return table[m][n];
+};