manoamaro

import SwiftUI
import UIKit

struct DataImageView<Placeholder: View>: View {

    
    private final class ViewModel: ObservableObject {

        @Published var image: UIImage?
        private let data: Data

manoamaro

fun getEventsFlow(): Flow<Event> = flow {
    coroutineScope { // Wrap the code with this, to have access  to the coroutine scope
        val url = "https://hacker-news.firebaseio.com/v0/updates.json"

        // Gets HttpURLConnection. Blocking function.  Should run in background
        val conn = (URL(url).openConnection() as HttpURLConnection).also {
            it.setRequestProperty("Accept", "text/event-stream") // set this Header to stream
            it.doInput = true // enable inputStream
        }

manoamaro

data class Event(val name: String = "", val data: String = "")

fun getEventsFlow(): Flow<Event> = flow {
    val url = "https://hacker-news.firebaseio.com/v0/updates.json"

    // Gets HttpURLConnection. Blocking function.  Should run in background
    val conn = (URL(url).openConnection() as HttpURLConnection).also {
        it.setRequestProperty("Accept", "text/event-stream") // set this Header to stream
        it.doInput = true // enable inputStream
    }

manoamaro

fun randomIntFlow(): Flow<Int> = flow {  //flow builder
    // suspend functions can be called from inside the flow
    for (i in 1..10) {
        emit(Random.nextInt()) // emit the value
        delay(1000) //suspend function
    }
}

runBlocking {
    randomIntFlow().collect { i -> println(i) } // collect() is a suspend function.

manoamaro

// Using the GlobalScope just as an example.
// For Android, should use the lifecycle scope so everything is stopped according to the lifecycle
GlobalScope.launch(Dispatchers.Main) { // Where the non-blocking code will run - Main Thread


    // "synchronous" call. All following code will run only when this blocks finish and return.
    val result1 = withContext(Dispatchers.IO) {// where this code will run - IO specific pool of threads
        // background thread
        // blocking or cpu intensive work
        // can return something

manoamaro

require 'matrix'

class Matrix
  # Assign the given value to the slot at the specified row and column
  def []=(row, column, value)
    @rows[row][column] = value
  end
  def to_s
    [sprintf("%d x %d Matrix", @rows.length, column_size),
      @rows.map { |row| row.inspect }].flatten.join("\n")

manoamaro

class Vertice
  attr_accessor :predecessor, :d, :name
  def initialize(n)
    @name = n
  end
end

class Edge
  attr_accessor :source, :destination, :w
  def initialize(s,d,w)