Dev

5-advanced-JS/starter/script.js

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+
+// //function constructors
+// var Person = function(name,yearOfBirth, job){
+//     this.name = name;
+//     this.yearOfBirth = yearOfBirth;
+//     this.job = job;
+// }
+// //Using the prototype method to include function in constructor
+// Person.prototype.calculateAge = function(){
+//     console.log(this.name, 'Age:  ', 2016 - this.yearOfBirth);
+// }
+
+// Person.prototype.lastName = 'Smith';
+
+// // Instanciation 
+// var john = new Person('John', 1990, 'Teacher');
+// var jane = new Person('Jane', 1969, 'designer');
+// var mark = new Person('Mark', 1948, 'retired');
+
+// john.calculateAge();
+// jane.calculateAge();
+// mark.calculateAge();
+
+// console.log(john.lastName);
+// console.log(jane.lastName);
+// console.log(mark.lastName);
+
+//Object.create
+// var personProto = {
+//     calculateAge: function(){
+//         console.log(2016 - this.yearOfBirth);
+//     }
+// };
+
+// var john = Object.create(personProto);
+// john.name = 'John';
+// john.yearOfBirth = 1990;
+// john.job = "Teacher";
+
+// var jane = Object.create(personProto, {
+//     name: { value: 'Jane'},
+//     yearOfBirth: { value: 1969},
+//     job: { value: 'Designer'}
+// });
+
+// //Primitives vs Objects
+
+// //Primitives
+// var a = 23;
+// var b = a;
+// a = 46;
+// console.log(a);
+// console.log(b);
+
+// //Objects
+// var obj1 = {
+//     name: 'John',
+//     age: 26
+// };
+
+// var obj2 = obj1;
+// obj1.age = 30;
+// console.log(obj1.age);
+// console.log(obj2.age);
+
+// //Functions
+// var age = 27;
+// var obj = {
+//     name: "Jonas",
+//     city: 'Lisbon'
+// }
+
+// function change(a, b){
+//     a = 30;
+//     b.city = 'San Fancisco';
+// }
+
+// change(age, obj);
+// console.log(age);
+// console.log(obj.city);
+
+//Passing functions as arguments
+var years = [1990, 1965, 1937, 2005, 1998];
+
+function arrayCalc(arr, fn){
+    var arrRes = [];
+    for(var i in years){
+        arrRes.push(fn(arr[i]));
+    }
+    return arrRes;
+}
+
+function calculateAge(el){
+    return 2016 - el;
+}
+
+function isFullAge(el){
+    return el >= 18;
+}
+
+function maxHeartRate(el){
+    if (el >= 18 && el <= 81) {
+        return Math.round(206.9 - (0.67 * el));
+    } else {
+        return -1;
+    }
+}
+
+var ages = arrayCalc(years, calculateAge);
+console.log(ages);
+
+var fullAges = arrayCalc(ages, isFullAge);
+console.log(fullAges);
+
+var rates = arrayCalc(ages, maxHeartRate);
+console.log(rates);