In Java, copy an object is not an easy task as it looks like. Most of us makes this mistake during the initial days of our development carreer. In Java, objects are not passed by value. For example, let’s take a look at the program below : public class Main { public static void main(String[] […]
Java RandomAccessFile explanation with examples
Introduction : RandomAccessFile is an important class in the Java IO package. Using this class, we can easily point to any position of a file, read any specific part of a file or write content to anywhere within a file. It behaves like a large array of bytes. The cursor, that is used to point […]
Java program to do left rotation ‘n’ times to an array
Introduction : In this tutorial, we will learn how to do the left rotation to an array. We will take the input from the user. The user will input both elements of the array and also the rotation number. Before starting the code, let me show you what is a left rotation and how it […]
Java example to filter files in a directory using FilenameFilter
Introduction : Sometimes we need to filter out file list based on its extension. For example, filtering out all .mp3 files in a specific folder. To implement such scenarios in Java, we have one inbuilt interface known as FilenameFilter. In this tutorial, we will learn how to use FilenameFilter to filter out files in a […]
Java program to Convert a double to string without exponential
Introduction : In Java, we can convert a double value to string using String.valueOf() inbuilt function. It will give the same desired output, i.e. we will get the same string value as the input. But, sometimes it may return a string with an exponential component or in scientific notation. Let me show you with an […]
Java Program to convert an ArrayList to an Array
Introduction : ArrayList is more flexible than the array. But sometimes we need to convert an ArrayList to an array and this tutorial will show you different ways to convert ArrayList to an array in Java. We have different ways to do this conversion. Let’s take a look : Using a loop : This is […]
How to split a string in Dart
Introduction : Splitting a string is available in almost all programming languages. Splitting divides a string in different parts based on one expression or rule. In dart also, we have an inbuilt splitting method known as split(). We can define it as below : List split(Pattern pattern); It takes one Pattern as input. Based on […]
Dart comparable example for comparing objects
How to use Comparable for comparing objects in Dart : Comparing two custom object can be done using Comparable interface. If you are familiar with Java, it works in a similar manner. In this tutorial, I will show you two examples of how to use it in Dart. Suppose, we have a list of students […]
How to create a simple and capped collection in MongoDB
Introduction : Collections are used to group MongoDB documents. If you are familier with RDBMS, you can think it like a table. Collections are created within a database. Again, documents are created within collection. These documents contains different different fields with different data. In this tutorial, we will show you how to create a collection […]
MongoDB tutorial : How to drop a database in MongoDB
Introduction : Drop a database means deleting a database. If you drop a database, it will remove everything inside it.In this tutorial, we will show you how to drop a database in MongoDB. Drop a database in MongoDB : Command db.dropDatabase() is used to drop any database if you are currently inside the database. It […]