In this section, we will see how to use the catch block for exception handling and the type conversion in C++.At first, let us see a code, and we will see what will be the output, and how they are generating.Example#include using namespace std; int main() {    try{ ... Read More

Here we will see how to generate random number in given range using C. To solve this problem, we will use the srand() function. The current time will be used to seed the srad() function.This function cannot generate random number in any range, it can generate number between 0 to ... Read More

Let us first create a collection with documents −> db.multipleConditionDemo.insertOne({"_id":1, "Name":"John"}); { "acknowledged" : true, "insertedId" : 1 } > db.multipleConditionDemo.insertOne({"_id":2, "Name":"Carol"}); { "acknowledged" : true, "insertedId" : 2 } > db.multipleConditionDemo.insertOne({"_id":3, "Name":"Sam"}); { "acknowledged" : true, "insertedId" : 3 } > db.multipleConditionDemo.insertOne({"_id":4, "Name":"David"}); { "acknowledged" : true, "insertedId" : ... Read More

To create Horizontal slider in Java, use the Swing JSlider. Let us first create a frame and a Horizontal slider in it −JFrame frame = new JFrame("Frame with Slider"); JSlider slider = new JSlider(JSlider.HORIZONTAL, 0, 100, 70);Now, we will set the values for the slider. Display the ticks −slider.setMinorTickSpacing(5); slider.setMajorTickSpacing(20); ... Read More

Here we will see what are the differences between qsort() in C, and sort() in C++.The C provides qsort() function, that can be used for sorting an array. The function arguments and syntax is like below.void qsort(void *base, size_t num, size_t size, int (*comparator) (const void*, const void*));This function takes ... Read More

The semaphore is a concept of process or thread synchronization. Here we will see how to use the semaphores in real programs.In Linux system, we can get the POSIX semaphore library. To use it, we have to include semaphores.h library. We have to compile the code using the following options.gcc ... Read More

To retrieve a nested object in MongoDB, use $ operator. Let us first create a collection with documents −> db.queryNestedObject.insertOne( ...    { ...       "StudentName" : "James", ...       "StudentSubjectScore" : [ ...          {"StudentMongoDBScore":98}, ...          {"StudentCScore":92}, ... ... Read More

To calculate timestamp difference, use aggregate framework. Let us first create a collection with documents −> db.timestampDifferenceDemo.insertOne({    "MovieBeginningTime": new ISODate("2019-05-12 10:20:30"),    "MovieEndingTime":new ISODate("2019-05-12 12:30:20") }); {    "acknowledged" : true,    "insertedId" : ObjectId("5cd7ba1f6d78f205348bc644") } > db.timestampDifferenceDemo.insertOne({    "MovieBeginningTime": new ISODate("2019-05-12 04:00:00"),    "MovieEndingTime":new ISODate("2019-05-12 07:10:00") }); { ... Read More

Here we will see how we can create a system, where we will create one client, and a server, and the client can send one string to the server, and the server will reverse the string, and return back to the client.Here we will use the concept of socket programming. ... Read More

This example demonstrate about How to schedule local notification in android.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. Step 3 − Add the following ... Read More