Untangling6

Untangling the webClass 6: user research, build tools, more javascript, and putting a website up

Agenda

Homework discussion UX and collaboration Build tools More JavaScript

Integrating JS into a web page functions Scope and context

JS exercises and project 1 group discussions Homework 5

Homework 4

Folks had a harder time with this than previous homeworks As we get into the programming assignments, more time will be

required and more work on your own Resources:

The computer science assistance centre, ECS 251, https://connex.csc.uvic.ca/portal/site/cscassist

For this initial exercise: http://www.teaching-materials.org/javascript/ Ask for help on the slack channel

Start early in case you get stuck! If you copy code from online, reference where you got it!

Homework 4

Concepts: Arrays Functions Looping Printing (one form, console.log)

Homework 4 – Arrays and functions

var wordLetters = ['G', 'O', 'A', 'T']; var guessedLetters = ['_', '_', '_', '_'];

Function guessLetter(letter) { do stuff…}

guessLetter('G'); guessLetter('I'); guessLetter('O'); guessLetter('A'); guessLetter('T');

Homework 4 – looping and printing

function guessLetter(letter) {

var goodGuess = false; var moreToGuess = false;

for (var i = 0; i < wordLetters.length; i++) { if (wordLetters[i] == letter) { guessedLetters[i] = letter; goodGuess = true; } if (guessedLetters[i] == '_') { moreToGuess = true; } }

if (goodGuess) { console.log('Yay, you found a letter!'); console.log(guessedLetters.join('')); if (!moreToGuess) { console.log('YOU WON!'); } } else { console.log('Oh noes, thats not right!'); }

}

Additional topics on the homework

Limit number of wrong guesses Displaying on web pages rather than the REPL

UX and collaboration

I’m giving this section incredibly short shrift There is a third year HCI course entirely devoted to this topic, when I

taught it we spent 4 classes just on the material shoved into the next 20 minutes

I wanted to give a flavour of it, though, because in a well executed project 1 there will be some user research, even if only from secondary sources

UX research

Primary sources Interviewing users Doing prototype usability studies Naturalistic observation of user behaviour User comments on your software (if it’s released)

Secondary sources Web research User comments on forums about similar software

Primary sources are best, but secondary sources are fine for early stage

User stories and Personas

Often before you have real users, you need imaginary users The more concrete these users are the better, build a back-story! These are personas

These personas interact with your software in multiple ways These are user stories

User stories are an important explanatory technique for your project User personas are an important tool to make those stories real and to

prioritize features

Team roles

Collaboration strategies

Hackathons Agile development

Sprints Scrums

Waterfall development

Back to Git

Each person develops in a branch Those branches are merged onto the master branch The master branch is tested to make sure the merged code behaves as

expected

Testing strategies

Individual code is tested before merging as well This is likely to be ad-hoc testing in this class In more rigorous environments Test Driven Development (TDD) is

practiced In this model, the developer writes test cases before writing the code Then the tests are automated to see if the code is meeting all the cases It is a really good practice to get into!

Build tools

This is getting back to class 4 I’m not going to spend too much more time on a local build

environment, but it is essential to doing time-effective development We’ll go through one of my environments to illustrate I won’t enforce that you set up an efficient dev environment, but I

certainly suggest it. Meaning: Understand the command line Understand a local editor (I suggest VS Code, but sublime or atom are fine

too) Use a local build tool to run a local web server with hot reloading and linting

Build tools

Build tools reading assigment

Basic version http://blog.modulus.io/introduction-to-grunt

Advanced version https://github.com/verekia/js-stack-from-scratch?utm_campaign=React

%2BNewsletter&utm_medium=email&utm_source=React_Newsletter_47

More JS – integrating JS into a web page Basic version https://jsfiddle.net/

Just save the fiddle and submit the homework as a link

Advanced version (you’ll need to get to this one eventually, but not necessarily this week) Set up and run a local build environment Copy the project up to a server (ie. nitrous.io or the generated version to

github pages)

More JS – Functions and scope

You wrote a function in the last homework Another function could go into that same file Would it share the same variables? Will this work?

Var variable1 = “foo ”Function hello(name) { Var compliment = “nice”; Console.log(“hello “+compliment+name);}Function goodbye(name) { Console.log(“bye “+compliment+name);}

More JS - scope

What about this?

Var variable1 = “foo ”Function hello(name) { Var compliment = “nice”; Console.log(“hello “+compliment+name);}Function goodbye(name) { Console.log(“bye “+variable1+name);}

More JS – execution context

The “this” pointer Scope is about variables, execution context is about objects New keyword Another reading assignment http://ryanmorr.com/understanding-scope-and-context-in-javascript/

JS exercises

http://www.w3resource.com/javascript-exercises/

(we’ll spend a couple minutes looking at these as a group and then there will be time to work on your own or work in your project groups)

Homework 5

Create a web page that asks for pizza toppings and creates your order Display a list of toppings and their associated prices, include at least 5

items in the list Pizza toppings should be typed in by the user in a comma delimited list in a

single text box. When all the toppings are entered, the user presses a “prepare order” button

The program should take the toppings and present the toppings with a total price. When the user presses the “place order” button present a pop-up dialog that says “thanks!”. Use CSS to make the thanks message large and red.

(if you have a problem with the pop-up, you can just display the thanks message underneath the button, but try to figure out the pop up!)