https://github.com/rbrtsmith/crockford-challenges

Challenges from Doug Crockford's JavaScript Good Parts course on Front-end Masters
https://github.com/rbrtsmith/crockford-challenges

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Challenges from Doug Crockford's JavaScript Good Parts course on Front-end Masters

• Host: GitHub
• URL: https://github.com/rbrtsmith/crockford-challenges
• Owner: rbrtsmith
• Created: 2015-09-26T13:23:40.000Z (over 9 years ago)
• Default Branch: master
• Last Pushed: 2015-09-27T12:30:06.000Z (over 9 years ago)
• Last Synced: 2024-12-06T21:56:05.009Z (28 days ago)
• Language: JavaScript
• Size: 277 KB
• Stars: 0
• Watchers: 2
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# Crockford-challenges

Challenges from Doug Crockford's JavaScript Good Parts course on Front-end Masters which can be found at https://frontendmasters.com/courses/javascript-the-good-parts/

My answers are written in both ES3/5 and ES6 (ES-2015)

1. Write a function that takes an argument and returns that argument.

2. Write two binary functions, `add` and `mul`, that take two numbers and return their sum and product.

3. Write a function that takes an argument and returns a function that returns that argument.

4. Write a function that adds from two invocations.

5. Write a function that takes a binary function, and makes it callable with two invocations.

6. Write a function that takes a function and an argument, and returns a function that can supply a second argument.

7. Without writing any new functions, show three ways to create the `inc` function. Using functions from the previous six problems.

8. Write `methodize`, a function that converts a binary function to a method.

9. Write `demethodize`, a function that converts a method into a binary function.

10. Write a function `twice` that takes a binary function and returns a unary function, that passes it's argument to the binary function twice.

11. Write a function `composeu` that takes two unary functions and returns a unary function that calls them both.

12. Write a function `composeb` thst takes two binary functions and returns a function that calls them both.

13. Write a function that allows another function to be only called once.

14. Write a factory function that returns two functions that implement an up/down counter.

15. Make a revocable function that takes a nice function and returns a `revoke` function that denies access to the nice function, and an `invoke` function that can invoke the nice function until it is revoked.