flexpath-collections-and-loops-exercises

Exercise overview

The intention of this exercise is to give you more experience working with collections and loops in JavaScript.

Getting Started

1. Using Visual Studio Code, open the folder flexpath-conditional-logic-and-control-flow-exercises wherever you saved it on your device.
2. Your VS code file explorer window should look like this:
3. Then open up the exercises.js file in the flexpath-conditional-logic-and-control-flow-exercises folder. Inside of this file we have provided exercises for you to complete, written in code comments. For each exercise, please code ONLY in the space between the comments // CODE IN THE OPEN LINES BELOW and // CODE IN THE OPEN LINES ABOVE
4. To run your code for different exercises, you will update the exercise mentioned on line 23 of the file.
5. After changing that line, make sure to SAVE the file before running it.
6. To run your code in exercises.js, you will update line 23 to run the exercise code you want to run and save the file. THEN, open a Terminal window in VS Code by going to your toolbar at the top of the page and selecting "Terminal" -> "New Terminal"
7. Inside of this terminal, check that you have Node.js installed by running the command node -v. If your computer doesn't recognize that keyword, please go back and ensure you installed Node.js correctly.
8. To run exercises.js you will then use the command node exercises.js in the terminal to run the file.

We have included the screen recording from exercise 2 showing how to run these types of exercise files.

VIDEO DISCLAIMER - You will need to clone the repo to your local device before you can watch the .mp4 file since GitHub does not support watching it from here.

Exercise solutions are in the /solution folder

 

Summary of JavaScript Concepts Covered in These Exercises

1. Data Collections:

   • Arrays: Creating, accessing, and manipulating arrays, using methods like push, unshift, splice, and includes.
   • Maps: Creating maps with the Map constructor, setting and getting values, and handling unique keys, including non-string keys.
   • Sets: Creating sets with the Set constructor, adding unique values, and using methods like has and delete.

2. Looping Constructs:

   • While Loop: Usage and potential pitfalls, like infinite loops.
   • Do-While Loop: How it differs from the while loop and when to use it.
   • For Loop: Structure and usage for iterating over arrays.
   • For-Of Loop: Simplifying iteration over array elements.
   • For-In Loop: Iterating over object properties.
   • Loop Control: Using break and continue for controlling loop flow, and understanding labeled statements for nested loops.

3. Memory Management:

   • Handling primitives and objects in memory.
   • Understanding reference types and how JavaScript manages collections.