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Last active Jan 13, 2016
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function Person() {}
Person.prototype.firstName = 'Hoang';
Person.prototype.lastName = 'Pham';
Person.prototype.showName = function() {
console.log(this.firstName + ' ' + this.lastName);
// Object được tạo sẽ có sẵn các trường firstName, lastName
// và hàm showName
var psn1 = new Person();
console.log(psn1.firstName); //Hoang
psn1.showName; //Hoang Pham
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