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Code Academy php unit Samuel

PHP Unit 11 advanced Arrays and Maps

lesson 1 Review of Arrays:


$fruits = array ('bananas', 'apples', 'pears');
echo $fruits[1]; /* Your code here! */

Lesson 2 Associative Arrays


// This is an array using integers as the indices...
$myArray = array(2012, 'blue', 5);

// ...and this is an associative array:
$myAssocArray = array('year' => 2012,
'colour' => 'blue',
'doors' => 5);

// This code will output "blue"...
echo $myArray[1];
echo '
';

// ... and this will also output "blue"!
echo $myAssocArray['colour'];

Lesson 3 Using Arrays as Maps


// This is an array using integers as the indices.
// Add 'BMW' as the last element in the array!
$car = array(2012, 'blue', 5, 'BMW');

// This is an associative array.
// Add the make => 'BMW' key/value pair!
$assocCar = array('year' => 2012,
'colour' => 'blue',
'doors' => 5,
'make' => 'BMW');

// This code should output "BMW"...
echo $car[3];
echo '
';

// ...and so should this!
echo $assocCar['make'];

**this lesson errors out when you try to submit it. Add a line after the ‘make’ line, something like ‘make’ => ‘BMW’);+ and hit submit. When it errors out then delete the + after the ; and hit submit again. Seems to be a bug with code academy validation.

Lesson 4 Accessing Associative Arrays


// This is an array using integers as the indices...
$myArray = array(2012, 'blue', 5, 'BMW');

// ...and this is an associative array:
$myAssocArray = array('year' => 2012,
'colour' => 'blue',
'doors' => 5,
'make' => 'BMW');

// This code will output "blue".
echo $myArray[1];
echo '
';

// Add your code here!
echo $myArray[1];
echo $myAssocArray['make'];

Lesson 5 Iterating Over Associative Arrays


$food = array('pizza', 'salad', 'burger');
$salad = array('lettuce' => 'with',
'tomato' => 'without',
'onions' => 'with');

// Looping through an array using "for".
// First, let's get the length of the array!
$length = count($food);

// Remember, arrays in PHP are zero-based:
for ($i = 0; $i < $length; $i++) { echo $food[$i] . '
';
}

echo '

I want my salad:
';

// Loop through an associative array using "foreach":
foreach ($salad as $ingredient=>$include) {
echo $include . ' ' . $ingredient . '
';
}

echo '

';

// Create your own array here and loop
// through it using foreach!

$hockeyTeams = array (
'blues' => 'great',
'hawks' => 'bad',
'wings' => 'worst');

//loop through array using "foreach"
foreach ($hockeyTeams as $team=>$include) {
echo $include . ' ' . $team . '
';

}

Lesson 6 Multidimensional Arrays

$deck = array(array('2 of Diamonds', 2),
array('5 of Diamonds', 5),
array('7 of Diamonds', 7),
array('8 of Hearts', 8));

// Imagine the first chosen card was the 7 of Diamonds.
// This is how we would show the user what they have:
echo 'You have the ' . $deck[2][0] . '!';

Lesson 7 putting it all togather


// On the line below, create your own associative array:
$myArray = array (
'cubs' => 'should hopefully be out soon');

// On the line below, output one of the values to the page:
echo $myArray['cubs'];

// On the line below, loop through the array and output
// *all* of the values to the page:

foreach ($myArray as $baseballTeam=>$list){
echo 'the' . ' ' . $baseballTeam . ' ' . $list;
}

Categories
Code Academy php unit Samuel

PHP Unit 10

Lesson 1:

// Create a Person class here:
class Person {

}

// And create a Person instance called $me here:
$me = new Person();

Lesson 2:

class Person {
public $isAlive = true;

function __construct($name) {
$this->name = $name;
}

public function dance() {
return "I'm dancing!";
}
}

$me = new Person("Shane");
if (is_a($me, "Person")) {
echo "I'm a person, ";
}
if (property_exists($me, "name")) {
echo "I have a name, ";
}
if (method_exists($me, "dance")) {
echo "and I know how to dance!";
}

Lesson 3:

class Shape {
public $hasSides = true;
}

class Square extends Shape {

}

$square = new Square();
// Add your code below!
if (property_exists($square, "hasSides")) {
echo "I have sides!";
}

lesson 4:

class Vehicle {
public function honk() {
return "HONK HONK!";
}
}
// Add your code below!

class Bicycle extends Vehicle {
public function honk() {
return "Beep beep!";
}
}

$bicycle = new Bicycle();
echo $bicycle->honk();

Lesson 5:

class Vehicle {
final public function honk() {
return "HONK HONK!";
}
}
// Add your code below!

class Bicycle extends Vehicle {
public function honk() {
return "Beep beep!";
}
}

$bicycle = new Bicycle();
echo $bicycle->honk();

Lesson 6:

class Person {

}
class Ninja extends Person {
// Add your code here...
const stealth = "MAXIMUM";

}
// ...and here!
echo Ninja::stealth;

lesson 7:

class King {
// Modify the code on line 10...
public static function proclaim() {
echo "A kingly proclamation!";
}
}
// ...and call the method below!
King::proclaim();

Lesson 8:

class Person {
public static function say() {
echo "Here are my thoughts!";
}
}

class Blogger extends Person {
const cats = 50;
static public $cats = "50";
}

Blogger::say();
echo Blogger::$cats;

Categories
php unit Samuel

Unit 9 Object Oriented Programming, Part 1

Unit 1 and 2 are review

// The code below creates the class
class Person {
// Creating some properties (variables tied to an object)
public $isAlive = true;
public $firstname;
public $lastname;
public $age;

// Assigning the values
public function __construct($firstname, $lastname, $age) {
$this->firstname = $firstname;
$this->lastname = $lastname;
$this->age = $age;
}

// Creating a method (function tied to an object)
public function greet() {
return "Hello, my name is " . $this->firstname . " " . $this->lastname . ". Nice to meet you! :-)";
}
}

// Creating a new person called "boring 12345", who is 12345 years old ;-)
$me = new Person('boring', '12345', 12345);

// Printing out, what the greet method returns
echo $me->greet();

Unit 3:

class Person{

}
$teacher = new Person();
$student = new Person();

Unit 4:


class Person{
public $isAlive = true;
public $firstname; //don't assign values to these in the public class, define them locally
public $lastname;
public $age;

}

$teacher = new Person();
$student = new Person();

//print out info
echo $teacher->isAlive; //note don't add a $to the isAlive value here it will cause syntax error

?>

unit 5:

class Person{
public $isAlive = true;
public $firstname; //don't assign values to these in the public class, define them locally
public $lastname;
public $age;

//assign values
public function __construct($firstname, $lastname, $age) {
$this->firstname = $firstname;
$this->lastname = $lastname;
$this->age = $age;

}

}

$teacher = new Person("boring", "12345", 12345);
$student = new Person("sam", "bell", 28);

//print out info
echo $teacher->isAlive;
echo $student->age;


unit 8:

class Dog {
public $numLegs = 4;
public $name;

public function __construct ($name){
$this->name = $name;

}

public function greet(){
return " Hello, my name is " . $this->name . ". nice to meet you";

}

public function bark(){
return "Woof!";
}

}

$dog1 = new Dog ("Barker");
$dog2 = new Dog ("Amigo");

echo $dog1->bark();
echo $dog2->greet();

?>

unit 9:


// Your code here
class Cat {

public $isAlive = true;
public $numLegs = 4;
public $name;
}

public function __construct ($name){
$this->name = $name;

}

public function meow(){
return "Meow meow";
}

$cat1 = new Cat ("CodeCat");

echo $cat1->meow();

}

Categories
mySQL

mySQL Lesson 2

select *
from orders
order by id
limit 100;

select *
from order_items
order by id
limit 100;

Categories
mySQL

mySQL lesson 1

select a table in the db and show info from this table:

SELECT * FROM celebs;

create DB table:

CREATE TABLE celebs (id INTEGER, name TEXT, age INTEGER);

insert info into DB:

INSERT INTO celebs (id, name, age) VALUES (1, 'Justin Bieber', 21);

INSERT INTO celebs (id, name, age) VALUES (2, 'Beyonce Knowles', 33);

INSERT INTO celebs (id, name, age) VALUES (3, 'Jeremy Lin', 26);

INSERT INTO celebs (id, name, age) VALUES (4, 'Taylor Swift', 26);

update a row in the DB

UPDATE celebs
SET age = 22
WHERE id = 1;

SELECT * FROM celebs;

Add a new column to the table

ALTER TABLE celebs ADD COLUMN twitter_handle TEXT;

SELECT * FROM celebs;

add information to this new column

UPDATE celebs
SET twitter_handle = '@taylorswift13'
WHERE id = 4;

SELECT * FROM celebs;

delete rows that have a NULL value

UPDATE celebs
SET twitter_handle = '@taylorswift13'
WHERE id = 4;
DELETE FROM celebs WHERE twitter_handle IS NULL;

SELECT * FROM celebs;

Categories
php unit

Unit 8 Functions Part II

1.) Functions refresher

print the number of characters in your name:

$length = strlen("Samuel");
echo $length;

2.) Functions Syntax

typical structure of a function:

function name(parameters) {
statement;
}


function helloWorld() {
echo "Hello world!";
}


3.) First Function


function displayName() {
echo "Samuel";
}
displayName();

5.) Returning Values

Instead of printing something to the screen, what if you want to make it the value that the function outputs so it can be used elsewhere in your program? In PHP, the return keyword does just that. It returns to us a value that we can work with. The difference between this and echo or print is that it doesn’t actually display the value.


function returnName() {
return "samuel";
}

6.) Parameters and Arguments

Functions wouldn’t be nearly as useful if they weren’t able to take in some input. This is where parameters or arguments come in. These are the variables or inputs that a function uses to perform calculations.

$name = "Samuel";
function greetings($name) {
echo "Greetings," .$name. "!";
}

greetings($name);

7.) Practice Defining multiple parameters


$name = "Samuel";
$age = "28";

function aboutMe($name, $age){
echo "Hello! My name is " .$name. " and I am " .$age. " years old";

}

aboutMe($name, $age);