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 on Trending Technologies
Technical articles with clear explanations and examples
C++ program to concatenate a string given number of times?
Here we will see how we can concatenate a string n number of times. The value of n is given by the user. This problem is very simple. In C++ we can use + operator for concatenation. Please go through the code to get the idea.AlgorithmconcatStrNTimes(str, n)begin res := empty string for i in range 1 to n, do res := concatenate res and res done return res endExample Live Demo#include using namespace std; main() { string myStr, res = ""; int n; cout > myStr; cout > n; for(int i= 0; i < n; i++) { res += myStr; } cout
Read MoreHTML DOM Location port Property
The Location port property returns/sets the port number (if specified) for a URL. Port number might not get displayed if not explicitly specified.SyntaxFollowing is the syntax −Returning value of the port propertylocation.portValue of the port property setlocation.port = portNumberExampleLet us see an example for Location port property − Live Demo Location port form { width:70%; margin: 0 auto; text-align: center; } * { padding: 2px; margin:5px; } input[type="button"] { border-radius: 10px; } ...
Read MoreRint(), rintf(), rintl() in C++
Here we will see three functions. These functions are Rint(), rintf() and the rintl(). These functions are used to convert floating point values into rounded format.The rint() FunctionThis function is used for rounding floating point value to integer. The syntax is like below. If the result is outside of return type, the domain error may occur. When the argument is 0 or infinity, then it will return unmodifiedfloat rint(float argument) double rint(double argument) long double rint(long double argument)Example#include #include using namespace std; main() { double a, b, x, y; x = 53.26; y = 53.86; ...
Read MoreImplement multiple conditions in MongoDB?
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" : 4 }Following is the query to display all documents from a collection with the help of find() method −> db.multipleConditionDemo.find().pretty();This will produce the following output −{ "_id" : 1, "Name" : "John" } { "_id" : 2, "Name" : "Carol" } { "_id" : 3, "Name" : "Sam" } { ...
Read MoreHow to understand StringBuffer is thread-safe and StringBuilder is non-thread-safe in Java?\\n
StringBuffer(Thread-safe)StringBuffer is thread-safe meaning that they have synchronized methods to control access so that only one thread can access StringBuffer object's synchronized code at a time.StringBuffer objects are generally safe to use in a multi-threaded environment where multiple threads may be trying to access the same StringBuffer object at the same time.StringBuilder(Non-thread-safe)StringBuilder is not synchronized so that it is not thread-safe. By not being synchronized, the performance of StringBuilder can be better than StringBuffer.If we are working in a single-threaded environment, using StringBuilder instead of StringBuffer may result in increased performance. This is also true of other situations such as ...
Read MoreHow to create Glue to fill the space between neighbouring components in Java?
Let’s say we have 6 components and we need to fill the space between some of them −JButton button1 = new JButton("CSK"); JButton button2 = new JButton("DC"); JButton button3 = new JButton("MI"); JButton button4 = new JButton("SRH"); JButton button5 = new JButton("RR"); JButton button6 = new JButton("KKR");To fill the space and separate components, create a Glue using the createGlue() method −Box box = new Box(BoxLayout.X_AXIS); box.add(button1); box.add(button2); box.add(Box.createGlue()); box.add(button3); box.add(button4); box.add(Box.createGlue()); box.add(button5); box.add(button6);The following is an example to fill the space between neighbouring components −Examplepackage my; import java.awt.BorderLayout; import javax.swing.Box; import javax.swing.BoxLayout; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JScrollPane; public class ...
Read MoreDecrement only a single value in MongoDB?
Let us first create a collection with documents −>db.decrementingOperationDemo.insertOne({"ProductName":"Product-1", "ProductPrice":756}); { "acknowledged" : true, "insertedId" : ObjectId("5cd7a8ae6d78f205348bc63c") } >db.decrementingOperationDemo.insertOne({"ProductName":"Product-2", "ProductPrice":890}); { "acknowledged" : true, "insertedId" : ObjectId("5cd7a8b86d78f205348bc63d") } >db.decrementingOperationDemo.insertOne({"ProductName":"Product-3", "ProductPrice":994}); { "acknowledged" : true, "insertedId" : ObjectId("5cd7a8c66d78f205348bc63e") } >db.decrementingOperationDemo.insertOne({"ProductName":"Product-4", "ProductPrice":1000}); { "acknowledged" : true, "insertedId" : ObjectId("5cd7a8d06d78f205348bc63f") }Following is the query to display all documents from a collection with the help of find() method −> db.decrementingOperationDemo.find().pretty();This will produce the following output −{ "_id" : ObjectId("5cd7a8ae6d78f205348bc63c"), "ProductName" : "Product-1", "ProductPrice" : 756 } { "_id" : ObjectId("5cd7a8b86d78f205348bc63d"), "ProductName" ...
Read MoreC++ Program to count Vowels in a string using Pointer?
To get the vowels from a string, we have to iterate through each character of the string. Here we have to use pointers to move through the string. For this we need C style strings. If the string is pointed by str, then *str will hold the first character at the beginning. Then if str is increased, the *str will point next character and so on. If the character is in [a, e, i, o, u] or [A, E, I, O, U] then it is vowel. So we will increase the countAlgorithmcountVowels(str)begin count := 0 for each character ...
Read MoreGeneralized Lambda Expressions in C++14
In C++11, the lambda was introduced. Lambdas are basically a part of code, that can be nested inside other function call statements. By combining lambda expressions with the auto keyword, they can be used later.In C++14, these lambda expressions are improved. Here we can get the generalized lambda. For example, if we want to create a lambda, that can add integers, add numbers, also concatenate strings, then we have to use this generalized lambda.Syntax of the lambda expression is looking like this:[](auto x, auto y) { return x + y; }Let us see one example to get the better idea.Example#include ...
Read MoreEscaping quotes while inserting records in MongoDB?
The double quotes have unicode which has the value \u0022. Let us first create a collection with documents −> db.escapingQuotesDemo.insert({ "StudentFullName": "John \u0022 Smith" }); WriteResult({ "nInserted" : 1 }) > db.escapingQuotesDemo.insert({ "StudentFullName": "David \u0022 Miller" }); WriteResult({ "nInserted" : 1 }) > db.escapingQuotesDemo.insert({ "StudentFullName": "John \u0022 Doe" }); WriteResult({ "nInserted" : 1 }) > db.escapingQuotesDemo.insert({ "StudentFullName": "Carol \u0022 Taylor" }); WriteResult({ "nInserted" : 1 })Following is the query to display all documents from a collection with the help of find() method −> db.escapingQuotesDemo.find().pretty();This will produce the following output −{ "_id" : ObjectId("5ccf42e2dceb9a92e6aa195b"), "StudentFullName" : "John \" Smith" ...
Read More