Others

1. SASS

2. @import "../node_modules/bootstrap/scss/bootstrap";

3. @use & @forward

4. REST API

5. it’s about communication

6. RESTful

7. pros

   1. simple & standardised
   2. scalable & stateless
   3. high performance due to cachings

8. Request

   1. General (start line)
      1. method/target/version
   2. operation: get, post, put, delete
   3. endpoint
   4. header
      1. API key
      2. authentication data
   5. body/ parameter

9. Response

   1. General (start line)
      1. version/statuscode/statustext
   2. header
      1. content type
   3. body
      1. requested resource

10. HTTP Methods

    1. GET
    2. POST
    3. PUT
    4. DELETE

11. Idempotent

12. Headers

13. Status code

    1. 1xx: Informational
    2. 2xx: Success
       1. 200 - Success
       2. 201 - Success and created
    3. 3xx: Redirect
       1. 301: moved to new URL
       2. 304: not changed
    4. 4xx: Client Error
       1. 401: Unauthorised
       2. 402: 402 Payment Required
       3. 403: Forbidden
       4. 404: page not found
    5. 5xx: Server Error

14. MIME type

15. HTTP v2

16. TCP and IP

17. CI CD (git)

18. JSDoc

19. /**
    * function description
    * @param {string} description
    */

20. Params

21. Returns

Blockchain

1. Centralised vs Decentralised
2. Blockchain
3. Ledger
4. Block
   1. data,
   2. hash,
   3. prev hash,
   4. Genesis block
5. Security
   1. Proof of work
      1. proof fo stake
   2. Consensus Rule
      1. Copy of chain in network
   3. Cryptographic proof
   4. Algo
      1. SHA256
      2. RSA
      3. MD5
6. Crypto
   1. no conversion
   2. centralised
   3. use case
      1. patient records
      2. real estate - lottery
7. Smart contracts
8. Ethereum
   1. Solidity
9. Mining
10. Gas fees