object oriented programming interview questions

read the name "# # #" (three #), the city name entered the end, # # #并不是一个城市的名字. If the number of city names to be read is n.Then you will read an integer matrix of nxn. Each number in the first row represents the mileage between the first city in the list of cities and the other city in turn. The mileage between the same city in the table is 0.Finally, you will read the names of two cities.Output format:Output the distance between the two cities.Input Sample:HagzouHugzoujigxng # # # 01108708 1

JavaScript is an object-based (object-based) language, and almost all of the things you encounter are objects. However, it is not a true object-oriented programming (OOP) language because its syntax has no class (class). So what should we do if we're going to encapsulate th

. public class Superclass {Public superclass () {This.bye = Superbye;This.hello = Superhello;}}public class subclass extends superclass {Public Subclass () {This.bye = Subbye;}} Conclusion In the above sections, we describe in detail the object-oriented implementations in Javascipt, or only the simulation implementations. In the meantime, I showed you how to implement it. It also explains how to detect rela

) {this.minute.increase (); if (this.minute.getValue () = = 0) { This.hour.increase ();}}} Public String toString () {//returns a strThe value of ING, in the form of "Hh:mm:ss", representing the current time. Each of these values occupies two bits, which is less than two 0. such as "00:01:22". Note that the colon is in Latin, not Chinese. Return String.Format ("%02d:%02d:%02d", This.hour.getValue (), This.minute.getValue (), This.second.getValue ());// Tip: String.Format () can format a string i

object (the browser is a Window object), so after the function is called, sayname () can be called through the Window object, or by call () (Apply () Call the person () function in the scope of a particular object, which is called in the scope of O, so after the call, O has all the properties and methods.4. Prototype

read attribute , the object.defineproperties () method, can obtain a descriptor for a given property, which accepts 2 parameters:Where the object is located and to read the description name, the return value is an object, and if it is an accessor property, the object hasConfigurable,enumerable,get,setif it is a data attribute, this

, ' y ')19>>> OBJ.Y19>>> hasattr (obj, ' power ') # have attribute Power(method)?True>>> getattr (obj, ' power ') # get Property PowerSyntaxerror:invalid character Inidentifier>>> getattr (obj, ' power ') () # get property Power value81>>> fn = getattr (obj, ' power ')>>> fn ()81Hasattr 's classic application scenarioApply the above Myobject () instance>>> def readpower (obj):... if hasattr (obj, ' power '):... return obj.power ().. else:... return None...>>> Readpower (Myobject)Traceback (most

Beijing Institute of Electronic Technology (BESTI)Real Inspection report Course: Java Programming Class: 1353 Name: Li Haiyin No.: 20135329Score: Instructor: Lou Jia Peng Experimental Date: 2015.5.7Experiment level: Preview degree: Experiment time:Instrument Group: Compulsory/elective: experimental serial number:Experiment Name: Java Object-oriented programm

1. The constructor is also a general function , and the following creates a constructor.var person=function(name,age,job) { this. name=name; this. age= age; this. job=job; this. sayname=function() { Console.log (this. Name); } }(1) Call by using the constructor function1 var person=New person ("xiaoming", +, "Doctor"); 2 Person.sayname (); // xiaoming(2) using normal function calls1 Person ("Xiaoming", "Doctor"); 2 Window.sayname (); // x

Some problems in object-oriented development of PHP

. colors=["Red", "Blue"];} function Subtype () {Supertype.call (this);} var New subtype (); Instance1.colors.push("Black"); alert (instance1.colors) ; // Red Blue Black var New subtype (); alert (instance2.colors); // Red BlueCombination Inheritance:function Supertype (name) {this.name = Name;this.colors = ["Red", "Blue"];} SuperType.prototype.sayName = function () {alert (this.name);}; Function subtype (name,age) {supertype.call (this,name);//inheritance Property This.age = age;} Inheritance me

Then, prototype can be used to dynamically enhance the object, then some JS primitive class, do not provide the function we want, we can use prototype to enhance it.Here are some specific cases, I hope you can extrapolate:Tail to Empty string.prototype.trim=function () {return this.replace (/^\s+|\s+$/igm, ');}; Alert ("' abc ' length = = =" + ' ABC ');//measure the length of the empty after the alert ("' ABC ' to empty after the length =

1. In an object-oriented programming language,PolymorphismYes inheritanceData abstractionAndInheritanceThe third basic feature. 2. "encapsulate" a new data type by combining features and behaviors. 3. "implement hiding" by "privatize" the detailsSeparation of interfaces and ImplementationsOpen. 4. The role of polymorphism is to eliminateCouplingLink. 5. Coupling

object);} The disadvantage of prototype schema creation objects is that the prototype object of an instance is shared, and when you modify the properties of an instance, if the value of the property is a method or base type, there is no effect, and when the property is a reference type, it affects the property values of the other instance.Combining the constructor pattern and the prototype schema to create

This is a created article in which the information may have evolved or changed. The previous article introduced the related features of the Go language sequential programming, many people say that go language is a better C language, the next chapter, we will introduce the go language for object-oriented thinking support. The go language does not follow many of

Summarize the JS Object Oriented constructor and js object constructor Based on JavaScript advanced programming.Introduction: In ECMAScript, there are no independent functions. All functions must be methods of an object. WhileA function is also an object. Attributes of all o

"PHP Object-oriented programming detailed" series of technical Articles collection, PHP-oriented summary of the object, for their usual study reference 1PHP Object-Oriented

that simply encapsulates the creation of the object code and then returns the newly created object.function person ( name, age, Job) { var o = new Object (); O.name = name; O.age = age; O.job = job; O.sayname = function () { console.log (this.name); } return o;} var friend = new person (' Micholas ', software, ' Engineer '); Friend.sayname ();In addition to using the new operat

Object-Oriented ProgrammingECMA-262 defines an object as: "A collection of unordered attributes whose properties can contain basic values, objects, or functions." "Strictly speaking, this is equivalent to saying that the object is a set of values that do not have a particular order. Each property and method of an

a particle motion system written in a global function that can be used to test the film. Characteristic analysis: The global function is the easiest programming technique to learn, but it has the following three questions: 1. The object-oriented component is very low In program