Complete Stage 1 and 2 of Bike-shop and through 'Class Patterns' of j…

bike-shop/src/stage1-literals.js

@@ -1,5 +1,20 @@
 const myBike = {
-  // your code here
+  name: "Roadster",
+  price: 199.99,
+  frame: {
+    height: 55,
+    color: 'blue',
+    style: 'cruiser'
+  },
+  brakes: {
+    front: false,
+    back: true
+  },
+  tires: {
+    diameter: 22,
+    type: 'fat'
+  },
+  rings: [2, 5]
 }
 
 module.exports = myBike

bike-shop/src/stage2-constructors.js

@@ -1,13 +1,24 @@
-function Bike() {
-  // your code here
+function Bike(name, price) {
+  this.name = name,
+  this.price = price,
+  this.tires = [new Tire(), new Tire()],
+  this.frame = new Frame(),
+  this.rings = [3, 7],
+  this.brakes = {
+    front: true,
+    back: true
+  }
 }
 
-function Frame() {
-  // your code here
+function Frame(color = 'black', size = 55, style = 'street') {
+  this.color = color,
+  this.size = size,
+  this.style = style
 }
 
-function Tire() {
-  // your code here
+function Tire(diameter = 22, type = 'street') {
+  this.diameter = diameter,
+  this.type = type
 }
 
 module.exports = {

jsinfo/An_error_in_the_inheritance.js

@@ -0,0 +1,20 @@
+function Animal(name) {
+  this.name = name;
+}
+
+Animal.prototype.walk = function() {
+  console.log(this.name + ' walks');
+};
+
+function Rabbit(name) {
+  this.name = name;
+}
+
+Rabbit.prototype.__proto__ = Animal.prototype;
+
+Rabbit.prototype.walk = function() {
+  console.log(this.name + " bounces!");
+};
+
+let rabbit = new Rabbit('Bootsie')
+console.log(rabbit.walk())

jsinfo/Chaining.js

@@ -0,0 +1,15 @@
+let ladder = {
+  step: 0,
+  up() {
+    this.step++
+    return this
+  },
+  down() {
+    this.step--
+    return this
+  },
+  showStep: function() {
+    alert(this.step)
+    return this
+  }
+};

jsinfo/Create_a_calculator.js

@@ -0,0 +1,19 @@
+let calculator = {
+
+  sum() {
+    return this.a + this.b
+  },
+
+  mul() {
+    return this.a * this.b
+  },
+
+  read() {
+    this.a = +prompt('Please enter your first number:')
+    this.b = +prompt('Please enter your second number:')
+  },
+};
+
+calculator.read();
+alert('The sum is: ' + calculator.sum());
+alert('The product is: ' + calculator.mul());

jsinfo/Create_an_extendable_calculator.js

@@ -0,0 +1,26 @@
+function Calculator() {
+  this.calculate = function(str) {
+    let arr = str.split(' ')
+    this.a = parseInt(arr[0])
+    this.op = arr[1]
+    this.b = parseInt(arr[2])
+    return this.operands[this.op](this.a, this.b)
+  },
+
+  this.addMethod = function(name, func) {
+    this.operands[name] = func
+  },
+
+  this.operands = {
+    '+': (a, b) => a + b,
+    '-': (a, b) => a - b,
+  }
+}
+
+let powerCalc = new Calculator();
+powerCalc.addMethod("*", (a, b) => a * b);
+powerCalc.addMethod("/", (a, b) => a / b);
+powerCalc.addMethod("**", (a, b) => a ** b);
+
+let result = powerCalc.calculate("2 / 4");
+console.log(result);

jsinfo/Create_new_accumulator.js

@@ -0,0 +1,12 @@
+function Accumulator(startingValue) {
+  this.value = startingValue;
+
+  this.read = function() {
+    this.value += +prompt('Please enter a value:')
+  }
+}
+
+let accumulator = new Accumulator(1);
+accumulator.read();
+accumulator.read();
+alert(accumulator.value);

jsinfo/Create_new_calculator.js

@@ -0,0 +1,20 @@
+function Calculator() {
+  this.sum = function() {
+    return this.a + this.b
+  },
+
+  this.mul = function() {
+    return this.a * this.b
+  },
+
+  this.read = function() {
+    this.a = +prompt('Please enter your first number:')
+    this.b = +prompt('Please enter your second number:')
+  }
+};
+
+let calculator = new Calculator();
+calculator.read();
+
+alert('The sum is: ' + calculator.sum());
+alert('The product is: ' + calculator.mul());

jsinfo/Hello_object.js

@@ -0,0 +1,8 @@
+let user = {}
+
+user.name  = 'John'
+user.surname = 'Smith'
+
+user.name = 'Pete'
+
+delete user.name

jsinfo/Multiply_numeric_properties_by_2.js

@@ -0,0 +1,15 @@
+let menu = {
+  width: 200,
+  height: 300,
+  title: 'My menu'
+};
+
+function multiplyNumeric(obj) {
+  for(let key in obj) {
+    if(typeof obj[key] === 'number') {
+      obj[key] *= 2;
+    }
+  }
+}
+
+multiplyNumeric(menu)

jsinfo/Rewrite_to_prototypes.js

@@ -0,0 +1,34 @@
+function Clock({ template }) {
+
+  this._template = template;
+}
+
+Clock.prototype._render = function() {
+
+    let date = new Date();
+
+    let hours = date.getHours();
+    if (hours < 10) hours = '0' + hours;
+
+    let mins = date.getMinutes();
+    if (mins < 10) min = '0' + mins;
+
+    let secs = date.getSeconds();
+    if (secs < 10) secs = '0' + secs;
+
+    let output = this._template
+      .replace('h', hours)
+      .replace('m', mins)
+      .replace('s', secs);
+
+    console.log(output);
+  };
+
+Clock.prototype.stop = function() {
+    clearInterval(this._timer);
+  };
+
+Clock.prototype.start = function() {
+    this._render();
+    this._timer = setInterval(() => this._render(), 1000);
+  };

jsinfo/Searching_algorithm.js

@@ -0,0 +1,19 @@
+let head = {
+  glasses: 1
+};
+
+let table = {
+  pen: 3,
+  __proto__: head
+};
+
+let bed = {
+  sheet: 1,
+  pillow: 2,
+  __proto__: table
+};
+
+let pockets = {
+  money: 2000,
+  __proto__: bed
+};

jsinfo/Why_two_hamsters_are_full.js

@@ -0,0 +1,23 @@
+let hamster = {
+  stomach: [],
+
+  eat(food) {
+    this.stomach.push(food);
+  },
+
+};
+
+let speedy = {
+  __proto__: hamster,
+  stomach: []
+};
+
+let lazy = {
+  __proto__: hamster,
+  stomach: []
+};
+
+speedy.eat("apple")
+console.log('Speedy: ', speedy.stomach );
+
+console.log('Lazy: ', lazy.stomach );