Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
Articles by Monica Mona
Page 4 of 7
Clearing a Dictionary using Javascript
We'll implement a clear() function that simply clears the contents of the container. For example, Exampleclear() { this.container = {} }You can test this using − Exampleconst myMap = new MyMap(); myMap.put("key1", "value1"); myMap.put("key2", "value2"); myMap.display(); myMap.clear(); myMap.display();OutputThis will give the output −{ key1: 'value1', key2: 'value2' }You can use the clear method in the same way in ES6 maps as well. For example, Exampleconst myMap = new Map([ ["key1", "value1"], ["key2", "value2"] ]); console.log(myMap) myMap.clear(); console.log(myMap)OutputThis will give the output −Map { 'key1' => 'value1', 'key2' => 'value2' } Map {}
Read MoreLoop through a Dictionary in Javascript
Here we'll implement a for each function in our class and accept a callback that we can call on every key-value pair. Let's see how we can implement such a function − ExampleforEach(callback) { for (let prop in this.container) { // Call the callback as: callback(key, value) callback(prop, this.container[prop]); } }You can test this using − Exampleconst myMap = new MyMap(); myMap.put("key1", "value1"); myMap.put("key2", "value2"); myMap.forEach((k, v) => console.log(`Key is ${k} and value is ${v}`));OutputThis will give the output −Key is key1 and value is value1 Key is key2 and value is value2ES6 ...
Read MoreWhat is the base class for errors and exceptions in Java?
All exception classes are subtypes of the java.lang.Exception class. The Exception class is a subclass of the Throwable class. Other than the Exception class there is another subclass called Error which is derived from the Throwable class.
Read MoreWhat is Deserialization in Java?
After a serialized object has been written into a file, it can be read from the file and Deserialized that is, the type information and bytes that represent the object and its data can be used to recreate the object in memory.Exampleimport java.io.*; public class DeserializeDemo { public static void main(String [] args) { Employee e = null; try { FileInputStream fileIn = new FileInputStream("/tmp/employee.ser"); ObjectInputStream in = new ObjectInputStream(fileIn); e = (Employee) in.readObject(); in.close(); ...
Read MoreWhich method must be implemented by all threads in Java?
While creating a thread class we must override the run() method of the Thread class. This method provides an entry point for the thread and you will put your complete business logic inside this method.Exampleclass ThreadDemo extends Thread { private String threadName; ThreadDemo( String name) { threadName = name; System.out.println("Creating " + threadName ); } public void run() { System.out.println("Running " + threadName ); try { for(int i = 4; i ...
Read MoreSAP interfaces throws an error message "Completion Code 2, Reason 2161, MQJMS2002”
As per my understanding, the only way to get the MQ jar files or the MQ C/C++ library files onto a system is by installing any of the below:Using WebSphere MQ product orUsing WebSphere MQ Client SupportPacsYou can find jar file under WebSphere MQ V7.0 Clients SupportPacks. The install files are commonly available under java/lib directory.You can try installing jar files from Fix Central. Go to Fix Central and enter "Java" in the Text search box.https://www-945.ibm.com/support/fixcentral/swg/identifyFixes?query.parent=ibm~WebSphere&query.product=ibm~WebSphere~WebSphere%20MQ&query.release=9.0&query.platform=AllThe name of the file to be downloaded is in this format:-[IBM|WS]-MQ-Install-Java-All.jar.For example, for MQ V9.0:9.0.0.0-IBM-MQ-Install-Java-All.jar.You have the following files that can be moved to ...
Read MoreWhat is length in Java Arrays?
Length is a filed in java, it gives the total number of the elements in a Java array. The length of an array is defined after the array was created.Integer[] myArray = {23, 93, 56, 92, 39}; System.out.println(myArray.length);
Read MoreHow many ways can get the instance of a Class class in Java?
You can create an object of the class named Class in two ways −Using new keyword as −Class obj = new Class();Using the forName() method of the class named Class.Class obj = Class.forName("DemoTest");
Read MoreMaking an SAP ABAP program to wait
You can use WAIT to hold the program for few seconds. Here is the syntaxSyntaxWAIT UP TO 36 SECONDSHowever, you need to be careful about using it. WAIT does an implicit commit. So you need to be sure that the commit does not corrupt the database. It also releases the work process.An alternative is to use below code −CALL FUNCTION 'ENQUE_SLEEP' EXPORTING seconds = 36.
Read MoreCan we create multiple database in SAP HANA system?
In SAP HANA, you don’t have a concept of creating multiple databases in one container. To create a separate container for your database objects, you can create the schema in HANA db.To create a schema, you can use below SQL query −CREATE SCHEMA schema nameYou can also define as owner name while defining a schema.CREATE SCHEMA [OWNED BY ]If it is not defined, the system takes the current user as the owner of the schema.
Read More