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Does Python support polymorphism?

Sri
Sri
Answered 1d 22h ago

Yes, Python support polymorphism.The word polymorphism means having many forms.polymorphism is an important feature of class definition in Python that is utilised when you have commonly named methods across classes or sub classes.Polymorphism can be carried out through inheritance, with sub classes making use of base class methods or overriding ... Read More

Compare define() vs const in PHP

Alok Prasad
Answered 1d 22h ago

As we know both define() and const are used to declare a constant in PHP script.Syntax<?php    const VAR = 'FOO'    define('VAR', 'FOO'); ?>Let's discuss the difference between these two.The basic difference between these two is that const defines constants at compile time, whereas define() defines them at run ... Read More

Does Python support multiple inheritance?

Sri
Sri
Answered 1d 22h ago

Yes, Python supports multiple inheritanceLike C++, a class can be derived from more than one base classes in Python. This is called multiple inheritance.In multiple inheritance, the features of all the base classes are inherited into the derived class.Exampleclass Animal:    def eat(self):       print("It eats insects.")   ... Read More

How many types of inheritance are there in Python?

Sri
Sri
Answered 1d 22h ago

Inheritance is concept where one class accesses the methods and properties of another class.Parent class is the class being inherited from, also called base class.Child class is the class that inherits from another class, also called derived class.There are two types of inheritance in python:Multiple InheritanceMultilevel InheritanceMultiple Inheritance:In multiple inheritance one ... Read More

What is the use of Object.is() method in JavaScript?

vineeth.mariserla
Answered 1d 23h ago

Object.is()Object.is() is used to check whether two values are same or not. Two values are same when they have the following criteria. Either both the values are undefined or null .Either both are true or false.Both strings should be of same length, same characters and in same order.The polarities of both the values should be equal.Both ... Read More

How to convert XML file into array in PHP?

Alok Prasad
Answered 1d 23h ago

To convert the XML document into PHP array, we have to utilize some PHP functions. The procedure is explained underneath with an example.Step 1:We have to create an XML file that needs to convert into the array.abc.xml <?xml version='1.0'?> <userdb> <firstname name='Alex'> <symbol>AL</symbol> <code>A</code> </firstname> <firstname name='Sandra'> <symbol>SA</symbol> <code>S</code> </firstname> ... Read More

How to call parent constructor in child class in PHP?

Alok Prasad
Answered 1d 23h ago

We will face two cases while calling the parent constructor method in child class.Case1:We can't run directly the parent class constructor in child class if the child class defines a constructor. In order to run a parent constructor, a call to parent::__construct() within the child constructor is required.Example:<?php    class ... Read More

How to handle the NumberFormatException (unchecked) in Java?

raja ramesh
Answered 2d 0h ago

The NumberFormatException is an unchecked exception thrown by parseXXX() methods when they are unable to format (convert) a string into a number.The NumberFormatException can be thrown by many methods/constructors in the classes of java.lang package. Following are some of them.public static int parseInt(String s) throws NumberFormatExceptionpublic static Byte valueOf(String s) throws NumberFormatExceptionpublic static byte parseByte(String s) throws NumberFormatExceptionpublic ... Read More

How to get doc strings in Python?

Sri
Sri
Answered 2d 0h ago

Doc strings is the documentation string which is string literal, and it occurs in the class, module, function or method definition, and it is written as a first statement.There are two types of a Doc strings:one-line Doc stringsmulti-line Doc stringsThese are mainly used in DataScience /Machine Learning Programming.one-line Doc stringsThis type of Doc ... Read More

How important is backslash in breaking a string in JavaScript?

vineeth.mariserla
Answered 2d 0h ago

Backslash(\) is very important in breaking a string in javascript. Without backslash when a string is breached, it can't be read by javascript there by no output is producedIn the following example since a backslash is not used while breaking a string, no output is displayed.ExampleLive Demo<html> <body> <p id="backslash"></p> <script>    document.getElementById("backslash").innerHTML ... Read More

How to add two strings with a space in first string in JavaScript?

vineeth.mariserla
Answered 2d 1h ago

To add two strings we need a '+' operator to create some space between the strings, but when the first string itself has a space with in it, there is no need to assign space explicitly. In the following example since the string 'str1' has a space with in it, just ... Read More

How to handle the ArithmeticException (unchecked) in Java?

raja ramesh
Answered 2d 1h ago

The java.lang.ArithmeticException is an unchecked exception in Java. Usually, one would come across java.lang.ArithmeticException: / by zero which occurs when an attempt is made to divide two numbers and the number in the denominator is zero. ArithmeticException objects may be constructed by the JVM.Example1Live Demopublic class ArithmeticExceptionTest {    public static ... Read More

How to parse an URL in JavaScript?

vineeth.mariserla
Answered 2d 2h ago

Parsing an URLIt is very simple to parse an URL in javascript by using DOM method rather than Regular expressions. If regular expressions are used then code will be much more complicated. In DOM method just a function call will return the parsed URL. In the following example, initially a function ... Read More

What are the differences between protected and default access specifiers in Java?

raja ramesh
Answered 2d 3h ago

The Protected access specifier is visible within the same package and also visible in the subclass whereas the Default is a package level access specifier and it can be visible in the same package.Protected Access SpecifierProtected will acts as public within the same package and acts as private outside the package.Protected will also act as ... Read More

What is an OutOfMemoryError and steps to find the root cause of OOM in Java?

raja ramesh
Answered 2d 21h ago

The OutOfMemoryError is thrown by JVM, when JVM does not have enough available memory, to allocate. OutOfMemoryError falls into the Error category in Exception class hierarchy.To generate OutOfMemoryErrorWe will allocate a large chunk of memory, which will exhaust heap memory storage.We will keep on allocating the memory and point will reach, when JVM ... Read More

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