Excel Sheet Column Number

Author: asumaran

171-excel-sheet-column-number.js

@@ -0,0 +1,24 @@
+/**
+ * @param {string} columnTitle
+ * @return {number}
+ */
+var titleToNumber = function (columnTitle) {
+  console.log('-'.repeat(100));
+  let res = 0;
+  for (let i = 0; i < columnTitle.length; i++) {
+    console.log({ i });
+    const n = columnTitle[i].charCodeAt(0) - 'A'.charCodeAt(0) + 1;
+    res = res * 26 + n;
+    console.log({ n });
+  }
+  return res;
+};
+
+console.log(titleToNumber('A')); //1
+console.log(titleToNumber('AB')); //28
+console.log(titleToNumber('ZY')); //701
+
+// console.log('A'.charCodeAt(0));
+// console.log('Z'.charCodeAt(0));
+
+// console.log('A'.charCodeAt(0));