## Intro π

Problem solving is an important skill, for your career and your life in general.

That's why I take interesting katas of all levels, customize them and explain how to solve them.

## Understanding the Exerciseβ

First, we need to understand the exercise! If you don't understand it, you can't solve it!.

My personal method:

1. Input: What do I put in?
2. Output: What do I want to get out?

### Today's exercise

Today, another `7 kyu` kata, meaning we slightly increase the difficulty.

Source: Codewars

Write a function `splitInParts`, that accepts two parameters: `myString` and `partLength`.

Given a string, e.g. `"HelloDev"`, and a number, e.g. `3`, return the input string split into `partLength`-long parts separated by a space, e.g. `Hel loD ev`.

Input: a string and a number.

Output: a string.

## Thinking about the Solution π­

I think I understand the exercise (= what I put into the function and what I want to get out of it).

Now, I need the specific steps to get from input to output.

I try to do this in small baby steps:

1. Get a `partLength`-long part of the input string and add a space
2. Do this for every part
3. Add the remaining part to the end
4. Return the string

Example:

• Input: `"HelloDev", 3`
• Get a `3`-long part of the input string and add a space: `"Hel "`
• Get a `3`-long part of the input string and add a space: `"loD "`
• Add the remaining part to the end: `"ev"`
• Return the string: `"Hel loD ev"`
• Output: `"Hel loD ev"` β

## Implementation β

``````function splitInParts(myString, partLength) {
let remaining = myString;
let result = "";

// do it only if the remaining string is longer than the parts
while (remaining.length >= partLength) {
// add the next part and a space to the result
result += remaining.slice(0, partLength) + " ";

// remove the added part from the remaining string
remaining = remaining.slice(partLength);
}

// add the last part that was smaller than the part length
result += remaining;

// remove a trailing space
return result.trim();
}
``````

### Result

``````console.log(splitInParts("HelloDev", 3));
// "Hel loD ev" β

console.log(splitInParts("HelloDev", 1));
// "H e l l o D e v" β
``````

## Playground β½

You can play around with the code here

## Next Part β‘οΈ

Great work!

We learned how to use `while`, `slice`, `trim`.

I hope you can use your new learnings to solve problems more easily!

Next time, we'll solve another interesting kata. Stay tuned!

If I should solve a specific kata, shoot me a message here.

If you want to read my latest stuff, get in touch with me!