gusennan

import sys
import random
import string
from itertools import combinations, repeat
from multiprocessing import Pool, cpu_count
from typing import List, Iterable, Tuple


def random_word(length: int) -> str:
    return ''.join(random.choice(string.ascii_lowercase) for i in range(length))

gusennan

Concurrency in Swift: One approach

Author: Chris Lattner

Contents

• Introduction
• Overall Vision
• Part 1: Async/await: Beautiful asynchronous APIs
• Part 2: Actors: Eliminating shared mutable state

gusennan

{
   "translated_on" : "2017-03-31T17:49:08.013463-04:00",
   "sentences" : [
      {
         "index" : 0,
         "tokens" : [
            {
               "index" : 1,
               "pos" : "NR",
               "word_translation" : "United States",

gusennan

<html:html xmlns:html="http://www.w3.org/1999/xhtml" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="-//W3C//DTD XHTML 2.0//EN" xsi:schemaLocation="http://www.w3.org/1999/xhtml http://www.w3.org/MarkUp/SCHEMA/xhtml2.xsd" xml:lang="en">
   <html:HEAD>
      <html:TITLE>Request Error</html:TITLE>
   </html:HEAD>
   <html:BODY>
      <html:DIV id="content">
         <html:P class="heading1">
            <html:B>Error Status Code:</html:B>
            'InternalServerError'
         </html:P>

gusennan

[{
	"title": "Blinker",
	"contents": [
		[11, 11],
		[12, 11],
		[11, 12],
		[12, 12],
		[13, 12],
		[11, 13],
		[12, 13]

gusennan

Open the terminal

cd <directory_that_contains_repository>
git add .
git commit -m "<your message here>"
git pull
git push origin master

gusennan

Readings:
The Swift Programming Language (Swift 2.2) (Links to an external site.) -  https://itunes.apple.com/us/book/swift-programming-language/id881256329?mt=11 (Links to an external site.) 
Pages 1-271
You will want to download that to iBooks and eventually read the entire thing.  The Swift Tour on Pages 3-33 you should know like the back of your hand.  Everything up through properties you should be familiar with starting next week.
Optional reading (Playgrounds which follow the book):
https://github.com/nettlep/learn-swift (Links to an external site.)
Highly recommend exploring portions of the book which don't seem clear in the noted playgrounds.  These implement all  of the examples from the book so that you don't have to type them in yourself.
Assignment
Problem 1 (20 points)  
Create a single view Project called Assignment2.  

gusennan

While in background:

Jan 12 11:20:14 iPhone-von-reBuy RebuyAppiOS[950] <Warning>: Warning: Unhandled exception: System.AggregateException: A Task's exception(s) were not observed either by Waiting on the Task or accessing its Exception property. As a result, the unobserved exception was rethrown by the finalizer thread. ---> System.NullReferenceException: Object reference not set to an instance of an object
  at RebuyApp.iOS.Renderers.ExtendedMapsRenderer.OnElementChanged (Xamarin.Forms.Platform.iOS.ElementChangedEventArgs`1 e) <0x1000a97b0 + 0x00240> in <filename unknown>:0 
  at Xamarin.Forms.Platform.iOS.VisualElementRenderer`1[TElement].SetElement (Xamarin.Forms.Platform.iOS.TElement element) <0x100dc3ac0 + 0x0028f> in <filename unknown>:0 
  at Xamarin.Forms.Platform.iOS.VisualElementRenderer`1[TElement].Dispose (Boolean disposing) <0x100dc4288 + 0x000d3> in <filename unknown>:0 

at Xamarin.Forms.Platform.iOS.ViewRenderer`2[TView,TNativeView].Dispose (Boolean disposing) <0x100dc2b00 + 0x000

gusennan

(1a)
double * line(double * pt1, double * pt2){
        double xTmp, yTmp;
        xTmp = (pt2[1]-pt1[1])/(pt2[0]-pt1[0]);
        yTmp = pt1[1] - xTmp*pt1[0];
        pt1[0] = xTmp;
        pt1[1] = yTmp;                                                                             
        return pt1;
}

gusennan

#!/bin/sh

PREREQ="dropbear"

prereqs() {
  echo "$PREREQ"
}

case "$1" in
  prereqs)