Create 1758-minimum-changes-to-make-alternating-binary-string.js

Author: everthis

1758-minimum-changes-to-make-alternating-binary-string.js

@@ -0,0 +1,14 @@
+/**
+ * @param {string} s
+ * @return {number}
+ */
+const minOperations = function(s) {
+  const arr = s.split('')
+  return Math.min(helper(arr, 0, '0'), helper(arr, 0, '1'))
+    
+  function helper(arr, idx, ch) {
+    if(idx === arr.length) return 0
+    if(arr[idx] !== ch) return 1 + helper(arr, idx + 1, ch === '0' ? '1' : '0')
+    else return helper(arr, idx + 1, ch === '0' ? '1' : '0')
+  }
+};