Create Dash Insert

Author: ratracegrad

Dash Insert

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+/***************************************************************************************
+*                                                                                      *
+*                  CODERBYTE BEGINNER CHALLENGE                                        *
+*                                                                                      *
+*  Dash Insert                                                                         *
+*  Using the JavaScript language, have the function DashInsert(str) insert dashes      *
+*  ('-') between each two odd numbers in str. For example: if str is 454793 the        *
+*  output should be 4547-9-3. Don't count zero as an odd number.                       *
+*                                                                                      *
+*  SOLUTION                                                                            *
+*  I am going to loop through each number in the string. Test if number is odd using   *
+*  modulus. If odd then check if next number is also odd. I have two odd numbers then  *
+*  insert dash into the string.
+*                                                                                      *
+*  Steps for solution                                                                  *
+*    1) Initialize idx to zero since using this as our counter                         *
+*    2) Use While loop to loop thru string since we will be adding dashes to it        *
+*    3) If currrent character is odd and so is next character then insert dash         *
+*    4) return modified string as answer                                               *
+*                                                                                      *
+***************************************************************************************/
+
+function DashInsert(str) { 
+
+   var idx = 0;
+    while (idx < str.length-1) {
+        if (Number(str[idx]) % 2 === 1 && Number(str[idx+1]) % 2 === 1) {
+          str = str.slice(0,idx+1) + "-" + str.slice(idx+1);
+          idx = idx + 2;
+        }
+        else {  
+            idx++;
+        }
+  }
+  return str;  
+         
+}