[Math] Refactor solution to Excel Sheet Column Number

kushal1243 · Sep 24, 2019 · 313a70f · 313a70f
1 parent 36a55b1
commit 313a70f
Showing 1 changed file with 6 additions and 8 deletions.
diff --git a/Math/ExcelSheetColumnNumber.swift b/Math/ExcelSheetColumnNumber.swift
@@ -7,15 +7,13 @@
 
 class ExcelSheetColumnNumber {
     func titleToNumber(s: String) -> Int {
-        var res = 0
-        let scalarsOfA = "A".unicodeScalars
+        var result = 0
 
-        for char in s.characters {
-            let scalars = String(char).unicodeScalars
-            let current = Int(scalars[scalars.startIndex].value - scalarsOfA[scalarsOfA.startIndex].value) + 1
-            res = res * 26 + current
+        for c in s.unicodeScalars {
+            let value = Int(c.value) - 64
+            result = (result * 26)  + value
         }
 
-        return res
+        return result
     }
-}
+}