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
-
Economics & Finance
Articles on Trending Technologies
Technical articles with clear explanations and examples
How do I define string constants in C++?
In C++, a string constant also called a string literal is a fixed sequence of characters enclosed in double quotes (" "). For example: "This is a string" and it is used to read-only memory, and its value cannot be changed during the program. Defining C++ Strings ConstantsYou can define your own named string constants by using: String Literals The const keyword The #define preprocessor directive The constexpr keyword(in modern C++) Let us understand each type of String Constant in C++ by ...
Read Moreenum vs. const vs. #define in C/C++
The #define, const, and Enum are all used for declaring constant values, but their behaviours and use cases differ. The #define is a preprocessor directive, which is used to define a macro (it is a string or name, in which you can assign a constant value), whereas const is a keyword with which you can declare a variable with a constant value. Whereas, an Enum is a special user-defined data type that represents a group of constants. In the following article, we will learn about all three in detail. Enumeration (Enum) An Enumeration (or Enum) is a user-defined data type ...
Read MoreWhat is the difference between iostream and iostream.h in C++?
Both and are the header files of C++ language. The .h extension was common in older, non-standard implementations like Turbo C++. The has been deprecated in modern C++ compilers and the became part of the C++ standard starting from the 1998 ANSI/ISO standard. The Header File The iostream.h header file was part of the early 1990s I/O streams library, developed at AT&T for use with early C++. At that time, C++ was not yet standardized. The purpose of this header file is used to perform the input-output operations. Example Following is an example of iostream.h as per ...
Read MoreHow to create timer using C++11?
The term "timer" is used to define the time based operations on hours, minutes, and seconds. Here, we can use the chrono library of C++ that helps to set the different timer operations like countdown, delayed, current time, etc. In this article, we will learn how to create a timer using C++. Timer Properties There are various properties to consider for building a timer in C++ program: Integer: int (milliseconds to wait until to run code). Boolean: bool (If this is true, it returns instantly, and run the code after specified ...
Read MoreScope Resolution Operator vs this pointer in C++
Both scope resolution operator and 'this' pointer are used for different purposes in the C++ programs. The scope resolution operator is used to access static or class members whereas this pointer is used to access object members when there is a local variable with the same name. Scope Resolution Operator in C++ The concept of scope resolution operator (::) is used in Object-Oriented Programming (OOPs) and namespace standard that can used to access something belongs to a specific scope, such as a class or namespace. Syntax It's syntax is as follows: :: Example In this program, we use ...
Read MoreWhat is the C++ equivalent of sprintf?
The sprintf() function of C library equivalent to C++ that is used to create strings with a specified format like custom text with numbers or names. In C++, we can perform the same operation as in C with the help of ostringstream.C++ std::ostringstreamThe ostringstream is known for the output string stream and is defined under header file. This is used to build the string by writing some text into it. Syntax i. Following is the basic syntax of sprint() function in C: int sprintf(char *str, const char *format, ...); ii. Here, we show the syntax of C++ function ...
Read MoreHow to use the collect() method in Stream API in Java 9?
In this article, we will learn to use the collect() method in the Stream API in Java 9. Java Stream API collect() Method In Java, the collect() method in the Stream API collects all objects from a stream object and stores them in a type of collection. The user has to provide what type of collection the results can be stored. We specify the collection type using the Collectors Enum. There are different types, and different operations can be present in the Collectors Enum. Syntax The following is the syntax for the collect() method declaration: R collect(Collector
Read MoreDifference between EnumMap and HashMap in Java
In this article, we will learn about the EnumMap and HashMap in Java. First, we will know about EnumMap, the syntax of EnumMap, and an example after that will learn about HashMap, the syntax of HashMap, and an example. At the end, we will see a table showing the difference between EnumMap and HashMap. What is EnumMap? EnumMap is introduced in JDK 5. It is designed to use an Enum as a key in the Map. It is an implementation of the Map interface. All of the keys in the EnumMap should be of the same enum type. Keys cannot be ...
Read MoreWhat is Unified JVM Logging in Java 9?
In this article, we will learn about the unified JVM logging in Java 9. Logging in the JVM is a great tool for performing root cause analysis, and it is a part of the JDK(Java Development Kit). Starting from JDK 9, the JVM maintainers chose to rebuild the way the JVM logs things. What is Unified JVM Logging? Java 9 can provide a common logging system for JVM components with a detailed level. By using a new command-line option: -Xlog for all logging settings, and unified JVM logging, gives us an easy-to-configure tool to do a root cause analysis (RCA) ...
Read MoreHow to access each stack element of StackWalker in Java 9?
In this article, we will learn to access each stack element of StackWalker in Java 9. We will learn about the StackWalker API and its methods, and use of getStackTrace() method for accessing each stack element. StackWalker API StackWalker API allows easy filtering and lazy access to execute tasks within any method. It is an efficient API for obtaining stack trace information in Java 9. StackWalker API is an alternative to Thread.getStackTrace() or Throwable.getStackTrace() and SecurityManager.getClassContext(). This API targets a mechanism to traverse and materialize required stack frames, allowing efficient lazy access to additional stack frames when required. The following ...
Read More