# String Week Challenge - Day 7

Hey! Here we are, a whole 7 days into this adventure. Thanks for joining in, it's really cool that other people want to play secret spy message decoder with me!

### ⏰ Complete this week's Challenges

Welcome to String Week! We're working towards decoding a secret message by combining all our work for the week, please check out Days 1-5 before working on today's challenge.
- [Day 1](https://blog.barbaralaw.me/huntober-2022-day-1)
- [Day 2](https://blog.barbaralaw.me/huntober-2022-day-2)
- [Day 3](https://blog.barbaralaw.me/huntober-2022-day-3)
- [Day 4](https://blog.barbaralaw.me/huntober-2022-day-4)
- [Day 5](https://blog.barbaralaw.me/huntober-2022-day-5)
- [Day 6](https://blog.barbaralaw.me/huntober-2022-day-6)

## ⭐ String Week

This week our challenges all deal with Strings! As one of JavaScript's primitive data structures, Strings are critical to understand and manipulate. Feel free to use JavaScript's built-in [String methods](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String#instance_methods).

## 🏆 The Challenge - Day 7

Oooh, yeah! Here it is, the final function you'll need in your string-decoding arsenal this week. Today's challenge might not be too trying after all the others, but you never know! 

Today you'll need to **create a function that swaps each letter of the alphabet for its opposite**.  A letter's opposite is one that, if the alphabet were flipped Z-A, would be the same number of letters in, and which would also have the opposite case.

Examples:
```
'A'  // first letter of the alphabet, uppercase
'z'  // last letter of the alphabet, lowercase

'p'  // 16th letter of the alphabet, lowercase
'K'  // 16th letter from *end* of alphabet, uppercase

'vCZNKOV: 0 MFNYVI LI KFMXGFZGRLM XSZMTVH'
// function replaces letters with opposites
'Example: 0 number or punctuation changes'

```

*Do me a favor and try to solve it a couple of different ways to see which you preferred and why*.


## 🧩 Put it all Together

Finally! We have every function needed to decode the gobbledygook I shared a week ago! Some of you already figured it out yesterday (bravo!), but let's pretend you didn't.

**Please use the daily functions,** ***in order,*** **to decode the week's secret message**. **Then, when you feel good about your result, go ahead and tweet the string with no explanation and #huntober2022, you earned it.**

```
const encryptedMsg = "e!!Igv)t5lltBcvbdeDH3dVw!OOtI#Aa.ZMDu7WYpP^VVjDc4I50iv#ylhgmQfs"
```

Two things to note:
1. It's very important that the functions are called in the order they were given (e.g. Day 1 first, Day 7 last), as any deviation could throw things far out of whack
2. Day 2 and Day 5 weren't designed to be part of this overall decoder. The **answers** you got on those days should be used as inputs for Days 3 & 6 respectively

## 👏 What now?

Please feel free to share your answers at each step, your code, feelings about the challenges, etc. as you please! I only ask that any spoilers have a little warning in case anyone wants to come in fresh later.

I'm torn on if I should share my code or not, as I went mostly brute force with this and the code is that of the baddie that I am. *Let me know in the comments what you think I should do.*

If you really want to go wild, see if you can reverse engineer an *encoding* sequence. A solution that fits any given string, key characters, and decoy sequence might not be as easy as it appears...

### Come back tomorrow for Week 2 - Day 1!

It's gonna be fun 🤓 

---

#### *Wait, What's Huntober?*

*[Leon Noel's 100Devs](https://leonnoel.com/100devs/) are spending October preparing for the job hunt. Anyone who has already broken into a tech career knows that the application and interview process can be grueling! The current cohort has progressed this year all the way from basic HTML files to hosted full-stack applications with authentication and databases.*


*This month they'll continue to build, but will also work on data structures & algorithms, networking and interview skills, and solving code challenges.*