Programming Questions

Can anyone explain Dash Insert challenge in more detail

I am trying to understand this problem, but by looking test cases, I can't understand what the problem is exactly asking for... Can anyone please help explain this problem?
<a href="coderbyte.com/CodingArea/information.php?ct=Dash%20Insert">Dash Insert Challenge</a>
Thanks

hdesai
posted this question on 10/4/14 **|**

2

Hello hdesai,
The challenge requires that you insert a dash between two CONSECUTIVE odd numbers So in other words if the input number is 8865321398, then you should output the result:
8865-321-3-98. If there are no two consecutive odd numbers then no dashes would be made, e.g 123456789 then result would still be 123456789.
Note: We assume that the sequence of numbers are all single digits from 0-9. 0 should be taken as an even number (not odd)/
So basically, you want to loop through the numbers and if digit[i] and digit[i+1] are both odd, then go ahead and insert a dash between digit[i] and digit[i+1]. Otherwise continue the loop without changing anything.
Hint: You'll most likely be using .split, .splice and .join array methods to complete this challenge,
Hope that helps!

kimeshan

answered on 10/04/14

1

Used this exercise to practice recursion... besides it being unnecessary/more difficult to follow, is there any reason this is a bad idea?

```
function DashInsert(str) {
let firstNumIndex = str.search(/[13579][13579]/);
if(firstNumIndex === -1) return str;
let firstNum = str[firstNumIndex];
let secondNum = str[firstNumIndex +1];
str = str.replace(/[13579][13579]/, firstNum + '-' + secondNum);
return DashInsert(str);
}
DashInsert(readline());
```

ugotabkdin

answered on 11/26/18

0

Hi Kim,
I understand that logic but I couldn't understand this test case :
Input = 99946 Output = "9-9-946".
According to challenge, it should o/p: 99-946 but how it's giving 9-9-946?
Thanks.

hdesai

answered on 10/05/14

0

Why are you not putting a dash between the first two nines?

mattlarsh

answered on 10/05/14

0

As mattlarsh pointed out, the first two 9's are consecutive odd numbers and therefore a dash is required between them.

kimeshan

answered on 10/06/14

0

I got it...

hdesai

answered on 10/06/14

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