teyyihan

const mongoose = require('mongoose')

const UserSchema = mongoose.Schema({
    _id: String,
    name: String,
    age: Number
})

module.exports = mongoose.model('Users',UserSchema)

teyyihan

const express = require('express')
const app = express()
const bodyParser = require('body-parser')
const io = require('socket.io')(3100)
const mongoose = require('mongoose')

// body-parser
app.use(bodyParser.json())

// collections

teyyihan

mongoose.connect('mongodb://localhost:27017/realtimeProject',{useNewUrlParser:true},
    function(err){
        if(err){
            throw err
        }
        console.log('Database connected')
       
})

teyyihan

mongoose.connect('mongodb://localhost:27017/realtimeProject',{useNewUrlParser:true},
    function(err){
        if(err){
            throw err
        }
        console.log('Database connected')
        
        io.on('connection',(socket)=>{
            console.log('user connected')
            socket.on('joinRoom',(data)=>{      // data will look like => {myID: "123123"}

teyyihan

Users.watch().on('change',(change)=>{
            console.log('Something has changed')
            io.to(change.fullDocument._id).emit('changes',change.fullDocument)
})

teyyihan

Dao{
  @Query("SELECT * FROM users WHERE label LIKE :query")
  fun pagingSource(query: String): PagingSource<Int, User>
}

ViewModel{
  Pager(
          config = PagingConfig(
            pageSize = NETWORK_PAGE_SIZE,
         ),

teyyihan

suspend fun <T> Task<T>.awaitTask(): T? = suspendCoroutine { continuation ->
    this.addOnCompleteListener { task ->
        if (task.isSuccessful) {
            continuation.resume(task.result)
        } else {
            continuation.resumeWithException(task.exception!!)
        }
    }
}

teyyihan

func fib(num int) int  {
	if num <= 1 {return 0}
	if num == 2 {return 1}
	return fib(num-1) + fib(num-2)
}

teyyihan

func memoFib(num int, d map[int]int) int  {
	if num <= 1 {return 0}
	if num == 2 {return 1}
	if val, ok := d[num]; ok {
		return val
	}
	d[num] = memoFib(num-1,d)+memoFib(num-2,d)
	return d[num]
}

teyyihan

func main() {
	d := make(map[int]int)
	t0 := time.Now()
	fmt.Println(fib(40))
	t1 := time.Now()
	fmt.Println(memoFib(40,d))
	t2 := time.Now()
	fmt.Println("It took ",t1.Sub(t0).Nanoseconds()," nanoseconds to calculate without memoization")
	fmt.Println("It took ",t2.Sub(t1).Nanoseconds()," nanoseconds to calculate with memoization")
}