panpsychism/unit_03/w08d02/homework

WDI-PANTHALASSA

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Title: Cipher & Shuffler
Type: Homework
Duration: "4:00"
Creator:
Original creator: Thom Page for WDI-Meeseeks
Modified by: Kristyn Bryan
Course: WDIr Panthalassa
Competencies: Basic Angular
Prerequisites: Angular, Javascript, HTML, CSS

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Part 1

CAESAR CIPHER

Angular js basics

APP

Make a Caesar Cipher page that takes an input and encodes it with a Caesar Cipher and and displays the encoded input while the user is typing. (no submit button).

Also make it so the user can decode an encoded message.

ANGULAR DIRECTIVES

• ng-keyup
• ng-model

CAESAR CIPHER

https://en.wikipedia.org/wiki/Caesar_cipher

You can put this Caesar Cipher code (or the code that you wrote a few weeks ago for the morning exerice) in a separate js file (before your main app.js), and then reference the caesarShift function in your angular controller.

Commit 1

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"Commit 1: Made an app.js with my Caesar Cipher function."

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In the example in the above image, the amount is set to 12 for encoding, and -12 for decoding.

var caesarShift = function(str, amount) {

	// Wrap the amount
	if (amount < 0)
		return caesarShift(str, amount + 26);

	// Make an output variable
	var output = '';

	// Go through each character
	for (var i = 0; i < str.length; i ++) {

		// Get the character we'll be appending
		var c = str[i];

		// If it's a letter...
		if (c.match(/[a-z]/i)) {

			// Get its code
			var code = str.charCodeAt(i);

			// Uppercase letters
			if ((code >= 65) && (code <= 90))
				c = String.fromCharCode(((code - 65 + amount) % 26) + 65);

			// Lowercase letters
			else if ((code >= 97) && (code <= 122))
				c = String.fromCharCode(((code - 97 + amount) % 26) + 97);

		}

		// Append
		output += c;

	}

	// All done!
	return output;

};

Commit 2

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"Commit 2: Connected the cipher to decode messages."

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Commit 3

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"Commit 3: Connected the cipher to encode messages."

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Add a little bit of styling to your cipher. Take a screenshot of it and upload it to your folder.

Commit 4

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"Commit 4: Uploaded the screenshot of the cipher."

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Part 2

##SONG LYRICS SHUFFLER

You will make a static page that displays songs with the song title, author, year, and lyrics. For no really good reason other than to practise ng-click and execute controller functions, you will be able to shuffle the order of the lyrics by clicking a shuffle button, as well as hide/show the song by clicking on the title.

Ultimately, you can add new songs to the page.

Sample screenshot:

The app should:

• Display song titles, authors, years, and lyrics line by line
• Hide / show the song by clicking on the title (the title does not get hidden 'cos you still have to click on it to show the song again)
• Shuffle the lyrics by pressing a shuffle button
• Add a new song
  • When entering lyrics, the user should separate the lines of lyrics with a comma. HINT FOR LATER when the form is submitted, the app could split the lines by comma for use in an array

Set up - you will need:

• index.html
• app.js
• style.css if you want to add some style

#####Sample data

this.songs = [ 
  {
	author: "De La Soul",
    title: "Ring Ring Ring",
	lyrics: [
		      "Hey how ya doin'",
	          "Sorry ya can't get through",
			  "Why don't you leave your name",
			  "And your number",
			  "And I'll get back to you"
			],
	year: 1991,
	hidden: false
  }, {
	author: "Ini Kamoze",
	title: "Here Comes the Hotstepper",
	lyrics: [
			  "Here comes the hot stepper",
			  "I'm the lyrical gangster",
			  "Pick up the crew in-a de area",
			  "Still love you like that"
	        ],
	year: 1995,
	hidden: false
   }, {
		author: "Snow",
		title: "Informer",
		lyrics: [
				  "Informer",
				  "You no say daddy me Snow me-a gon' blame",
				  "I lick he boom boom down",
				  "'tective man they say, say daddy me Snow me stab someone down the lane",
			      "I lick he boom boom down."
			    ],
				  year: 1993,
				  hidden: false
   }
];

Server and database will be introduced tomorrow Overall, you will need data and functions in your controller.

Commit 5

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"Commit 5: Set up my initial files."

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#####Display songs

• A link to Angular 1.5 from https://angularjs.org/
• module / ng-app
• controller / ng-controller
• ng-repeat ( you might want to include a track by $index in the directive params, but if you don't need to, then don't)
• ng-click (hint: you can pass in $index as a param)
• ng-if or alternatively, ng-hide and/or ng-show
• curlies {{ }}

Commit 6

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"Commit 6: Setup and now displaying the songs."

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#####Add a song

• a form with an ng-submit
• inputs that rout to ng-models which could be inside a formdata object in the controller maybe.

Commit 7

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"Commit 7: Setup and now able to add a song."

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#####Shuffle function Pass in an array and the shuffle function will randomize the order of the elements

	  function shuffle(a) {
	    var j, x, i;
	    for (i = a.length; i; i -= 1) {
	        j = Math.floor(Math.random() * i);
	        x = a[i - 1];
	        a[i - 1] = a[j];
	        a[j] = x;
	    }
    	return a;
	  }

Commit 8

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"Commit 8: Can shuffle the order of the songs."

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Add a little bit of styling to your shuffler. Take a screenshot of it and add it to your folder.

Commit 9

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"Commit 9: Added a screenshot of my shuffler."

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