Merge pull request #1604 from acegautam/patch-2

JS solution to LC 682 | Baseball game

Author: tahsintunan

Diff for: javascript/682-Baseball-Game.js

@@ -0,0 +1,29 @@
+/**
+ * @param {string[]} operations
+ * @return {number}
+ */
+var calPoints = function(operations) {
+    let runningSum = 0;
+    const stack = [];
+    for(const o of operations) {
+        if(o === 'C') {
+            runningSum -= stack.pop();
+            continue;
+        }
+        if(o === 'D') {
+            const val = stack[stack.length - 1] * 2;
+            stack.push(val);
+            runningSum += val;
+            continue;
+        }
+        if(o === '+') {
+            const val = stack[stack.length - 1] + stack[stack.length - 2];
+            stack.push(val);
+            runningSum += val;
+            continue;
+        }
+        stack.push(+o);
+        runningSum += +o;
+    }
+    return runningSum;
+};