explaination and solution of: Isograms kyu7 codewars javascript

Hey there! 👋

In this Codewars challenge, we are solving the Isogram problem. But, what exactly is an isogram? 🤔

An isogram is a word where no letters repeat, either consecutively or non-consecutively. 🅰️🅱️ Every letter must be unique!

For example:

The word "Dermatoglyphics" is an isogram, so it returns true. ✅
The word "aba" is not an isogram because the letter "a" repeats, so it returns false. ❌
And, even though "moOse" has an uppercase "M" and a lowercase "o", we still count this as repeating letters because we ignore letter case. So, it also returns false. ❌
Now, let's dive into how to code this solution. 🎯

Step-by-step solution:
First, we need to make sure the function ignores whether letters are uppercase or lowercase. So, we convert the entire string to lowercase. 🅰️ ➡️ a
Next, we use a Set in JavaScript. A Set automatically stores only unique values. So, if we convert the string into a set, all repeating letters will be removed.
Finally, we check if the length of the set is the same as the original string. If they are the same, it means all letters were unique, and we return true. If not, we return false. 🔁
Here's how the code looks:

```
function isIsogram(str) {
// Convert string to lowercase to ignore case sensitivity

// Create a Set from the string characters
const uniqueLetters = new Set(str);

// If the length of the set is the same as the string, it's an isogram
}
```

And that’s it! Simple, right? 🚀 This is an efficient and easy-to-understand way to determine whether a word is an isogram.

Hope this was helpful! Make sure to try this kata out yourself. Drop a like, and I’ll see you in the next one! 👋
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