liang799

My notes for Git

Taken from Git Pro and StackOverflow

Commands

git add

Stages a file

git commit

Creates a checksum for staged files

liang799

As a _____, I want to ____, so i can _____

In order to ______, As a ____, I want _____

liang799

val res = repository.doApiCall()
val specificHeader = res.headers()["Header name here"])

liang799

My notes

Helpful Resources

• Max Belsky's summary
• Official Terrifcally Simple JSON docs

Recap

{
 "key": "value"
}

liang799

Important

Check for null

?.

liang799

Async functions

Write Asynchronous code (promises) in a synchronous manner

Await

makes the code wait at that point until the promise is settled, at which point the fulfilled value of the promise is treated as a return value, or the rejected value is thrown.

liang799

Tips

Doesn't work

test += 1 + 1;

Java Doesn't throw integer exceptions

Integer.MAX_VALUE + 1;

liang799

Gradient descent

Basically finding optimal weight

Find optimal weight

How to find best weight that minimizes loss? --> Lowest point in the graph --> Gradient is zero --> Stepping

Batch VS Epoch

liang799

Keys

Primary Key

• serve to uniquely identify a row in the table
• build an index on Primary key to facilitate fast search and retreival

Foreign Key

• a key that is used to link 2 tables together
• table containing foreign key -> child table
• table containing primary key -> referenced or parent table

Referential integrity

liang799

{
  "Healthtips": [
    {
      "healthtext": "drink water",
      "healthimage": "https://i.imgur.com/pa3wtnD.jpg"
    },
    {
      "healthtext": "eat fruits",
      "healthimage": "https://i.imgur.com/WaI9qBT.jpg"
    },