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improvements to OOP

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Quincy Larson
2015-08-16 05:25:10 -07:00
parent 58680f934f
commit e2d3e10cef
1 changed files with 65 additions and 50 deletions
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115
challenges/object-oriented-and-functional-programming.json
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@ -2,6 +2,7 @@
"name": "Object Oriented and Functional Programming",
"order": 0.010,
"note": [
"Methods",
"Closures",
"Factories",
"Pure Functions",
@ -41,7 +42,7 @@
" // Only change code above this line.",
"};",
"",
"(function(){return(JSON.stringify(motorBike));})();"
"(function() {return(JSON.stringify(motorBike));})();"
],
"challengeType":1,
"type": "waypoint",
@ -56,23 +57,31 @@
"Give your <code>motorBike</code> object a <code>wheels</code>, <code>engine</code> and <code>seats</code> attribute and set them to numbers."
],
"tests":[
"assert(typeof((new Car()).engines) === 'number', '<code>engines</code> should be have a <code>engines</code> attribute set to a number.');",
"assert(typeof((new Car()).wheels) === 'number', '<code>wheels</code> should be have a <code>engines</code> attribute set to a number.');",
"assert(typeof((new Car()).seats) === 'number', '<code>seats</code> should be have a <code>engines</code> attribute set to a number.');"
"assert(typeof((new MotorBike()).engines) === 'number', '<code>engines</code> should be have a <code>engines</code> attribute set to a number.');",
"assert(typeof((new MotorBike()).wheels) === 'number', '<code>wheels</code> should be have a <code>engines</code> attribute set to a number.');",
"assert(typeof((new MotorBike()).seats) === 'number', '<code>seats</code> should be have a <code>engines</code> attribute set to a number.');"
],
"challengeSeed":[
"// Let's add the properties engine and seats to the car in the same way that the property wheels has been added below. They should both be numbers.",
"var Car = function(){",
" // Only change code below this line.",
"var Car = function() {",
" this.wheels = 4;",
" this.engines = 1;",
" this.seats = 1;",
"};",
"",
"var motorBike = new Car();",
"var myCar = new Car();",
"",
"// Only change code below this line.",
"var MotorBike = function() {",
"",
"",
"",
"};",
"",
"var myMotorBike = new MotorBike();",
"// Only change code above this line.",
"",
"(function(){return(JSON.stringify(myCar));})();"
"(function() {return(JSON.stringify(myMotorBike));})();"
],
"challengeType":1,
"type": "waypoint"
@ -82,74 +91,80 @@
"title":"Understanding Public and Private Properties",
"difficulty":0,
"description":[
"In the last challenge we use the <code>this</code> to reference public properties the current object or function.",
"We can also create variables and functions that aren't accessible from outside the object."
"Objects have their own attributes, called <code>properties</code>, and their own functions, called <code>methods</code>.",
"In the previous challenge, we used the <code>this</code> keyword to reference <code>public properties</code> and <code>public methods</code> of the current object.",
"We can also create <code>private properties</code> and <code>private methods</code>, which aren't accessible from outside the object.",
"To do this, we omit the word <code>this</code> from the <code>property</code> or <code>method</code> declaration.",
"See if you can keep <code>myBike.speed</code> and <code>myBike.addUnit</code> private, while making <code>myBike.getSpeed</code> publicly accessible."
],
"tests":[
"assert(typeof(myBike.getSpeed)!=='undefined' && typeof(myBike.getSpeed) === 'function', 'The method getSpeed of myBike should be accessible outside the object');",
"assert(typeof(myBike.speed) === 'undefined', '<code>myBike.speed</code> should remain undefined.');",
"assert(typeof(myBike.addUnit === 'undefined'), '<code>myBike.addUnit</code> should remain undefined.');"
"assert(typeof(myBike.addUnit) === 'undefined', '<code>myBike.addUnit</code> should remain undefined.');"
],
"challengeSeed":[
"//Let's create an object with a two functions. One attached as a property and one not.",
"var Car = function(){",
" this.gear = 1;",
" function addStyle(styleMe){",
" return('The Current Gear Is: ' + styleMe);",
" }",
" this.getGear = function(){",
" return(addStyle(this.gear));",
" };",
"var Car = function() {",
" this.gear = 1;",
" function addStyle(styleMe){",
" return('The Current Gear Is: ' + styleMe);",
" }",
" this.getGear = function() {",
" return(addStyle(this.gear));",
" };",
"};",
"",
"//Make the function getSpeed of Bike publicly accessible",
"",
"var Bike = function(){",
" speed = 100;",
" function addUnit(value){",
" return(value + \"KM/H\");",
" }",
" ",
" getSpeed = function (){",
" return(addUnit(speed));",
" };",
" ",
"var Bike = function() {",
" // Do not modify the code above this line.",
" this.speed = 100;",
" function addUnit(value) {",
" return(value + \"KM/H\");",
" }",
" ",
" getSpeed = function () {",
" return(addUnit(speed));",
" };",
" ",
"};",
"",
"//Instantiated Here",
"// Do not modify the code below this line.",
"var myCar = new Car();",
"var myBike = new Bike();",
"",
"if(myBike.hasOwnProperty('getSpeed')){(function(){return(JSON.stringify(myBike.getSpeed()));})();};"
"if(myBike.hasOwnProperty('getSpeed')){(function() {return(JSON.stringify(myBike.getSpeed()));})();};"
],
"challengeType":1,
"type": "waypoint"
},
{
"id":"cf1111c1c15feddfaeb4bdef",
"title":"Instantiation",
"title":"Create Instances of JavaScript Objects from a Constructor Function",
"difficulty":0,
"description":[
"Instantiation at it's most basic level is where you are creating a copy of an object from a template for use at a later time.",
"The instance inherits all the properties and methods of the original Object."
"Sometimes you'll want to be able to easily create similar objects.",
"Objects have their own attributes, called <code>properties</code>, and their own functions, called <code>methods</code>.",
"A function that creates objects is called a <code>constructor</code>.",
"You can create <code>instances</code> of an object using a <code>constructor</code>.",
"Each new <code>instance</code> of this object <code>inherits</code> all the <code>properties</code> and <code>methods</code> of your original object.",
"Then you can give the instance new properties."
],
"tests":[
"assert((new Car()).wheels === 4, 'The property wheels should be four in the object constructor');",
"assert(typeof((new Car()).engine) === 'undefined', 'There should not be a property engine in the object constructor');",
"assert((new Car()).wheels === 4, 'The property <code>wheels</code> should still be 4 like in the object constructor');",
"assert(typeof((new Car()).engines) === 'undefined', 'There should not be a property engine in the object constructor');",
"assert(myCar.wheels === 4, 'The property wheels of myCar should be four');",
"assert(typeof(myCar.engine) === 'number', 'The property engine of myCar should be a number');"
"assert(typeof(myCar.engines) === 'number', 'The property engine of myCar should be a number');"
],
"challengeSeed":[
"var Car = function(){",
"var Car = function() {",
" this.wheels = 4;",
"};",
"",
"var myCar = new Car();",
"",
"//Add the property engine to myCar using dot notation and make it a number",
"//Add the property \"engines\" to myCar, and make it a number.",
"",
"",
"(function(){return(JSON.stringify(myCar));})();"
"(function() {return(JSON.stringify(myCar));})();"
],
"challengeType":1,
"type": "waypoint"
@ -176,7 +191,7 @@
"",
"",
"",
"(function(){return(array);})();"
"(function() {return(array);})();"
],
"challengeType":1,
"type": "waypoint"
@ -201,7 +216,7 @@
"",
"",
"",
"(function(){return(singleVal);})()"
"(function() {return(singleVal);})()"
],
"challengeType":1,
"type": "waypoint"
@ -227,7 +242,7 @@
"",
"",
"",
"(function(){return(array);})();"
"(function() {return(array);})();"
],
"challengeType":1,
"type": "waypoint"
@ -252,7 +267,7 @@
"",
"",
"",
"(function(){return(array);})();"
"(function() {return(array);})();"
],
"challengeType":1,
"type": "waypoint"
@ -274,7 +289,7 @@
"",
"",
"",
"(function(){return(array);})();"
"(function() {return(array);})();"
],
"challengeType": 1,
"type": "waypoint"
@ -299,7 +314,7 @@
"",
"",
"",
"(function(){return(array);})()"
"(function() {return(array);})()"
],
"challengeType": 1,
"type": "waypoint"
@ -322,7 +337,7 @@
"",
"var array = string;",
"",
"(function(){return(array);})();"
"(function() {return(array);})();"
],
"challengeType":1,
"type": "waypoint"
@ -344,7 +359,7 @@
"",
"joinMe = joinMe;",
"",
"(function(){return(joinMe);})();"
"(function() {return(joinMe);})();"
],
"challengeType":1,
"type": "waypoint"