forward_list::unique() in C++29 Aug 2024 | 2 min read Forward lists are sequence structures that allow constant-time insert and erase processes anywhere in the sequence. Forward lists are implemented as singly linked lists. The ordering is maintained by associating each element with a link to the next element in the sequence. forward_list::unique() is a function in the C++ standard library that is used to eliminate all duplicate entries from a forward list. It should be noted that an element is only deleted from the forward_list container if it compares to the element immediately before it. As a result, this method is especially helpful for sorted lists. Syntax:It has the following syntax: Syntax for the binary predicate:This function takes a single parameter, it is a binary predicate that returns true if the items should be considered as equal. ApproachThe fundamental drawback of utilizing list and forward_list over other sequence containers is that they do not provide direct access to any element by its location, such as using the operator []. To access any of the elements in a forward_list, iteration must be performed from a known point (such as the starting point or end of the list) to the element's position, requiring linear time. Example:Let's take an example to illustrate the use of forward_list_unique() function in C++. Output: The elements of the list before the unique operation: 1 1 4 4 4 2 2 2 2 5 5 5 5 5 Elements after the unique operation is: 1 4 2 5 |
Write a C++ program to implement the Bloom filter data structure
Introduction: Probabilistic data structures called bloom filters offer a space-efficient way to determine if an element belongs to a collection. Since being developed in 1970 by Burton Howard Bloom, they have been widely used in many computer science and engineering domains. Bloom filters are extremely beneficial in...
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Factory Design Pattern C++
Introduction: In Software Development, Design Patterns provide reusable solutions to common programming problems. The Factory Design Pattern is one of the most widely used design patterns in object-oriented programming. An interface for making objects in a superclass is provided by the Factory Design Pattern, although subclasses are...
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C++ Program For Octal To Decimal Conversion
In this article, we will discuss the C++ program for octal to decimal conversion with its explanation. Program: Here's a simple C++ program to convert an octal number to its decimal equivalent: #include <iostream> #include <cmath> using namespace std; int octalToDecimal(int octalNumber) { int decimalNumber = 0, i = 0, remainder; while (octalNumber !=...
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Leaders in an array in C++
The element in an array that is the greatest relative to all the items on its right side is known as the leader of the array. According to this, the leader will always be the element on the right. The Leaders in array problem is essentially explained...
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C++ Program to Perform LU Decomposition of Any Matrix
A popular method in numerical analysis for resolving linear equation systems and computing matrix inverses is LU decomposition. The process entails breaking down a matrix into its product of an upper triangular matrix (U) and a lower triangular matrix (L). Engineering, physics, and computational mathematics are...
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Boundary traversal of binary tree in C++
The process of visiting the boundary nodes of a binary tree in a particular order is referred to as boundary traversal. The left boundary, which does not include the left leaf nodes, leaf nodes, and the right boundary, which does not include the right leaf nodes,...
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Opening and Closing a File in C in C++ Pdf
File handling operation is a very important part of programming in C++. In most programs, we need to read from or write to files. In C++, we can use the file handling library to perform file operations. This library provides several functions that allow us to...
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Add two Numbers using Function in C++
The below code is a simple example of adding two numbers in C++ using a function. The code uses the add function to add two numbers and the main function to call the add function and display the result on the console. The code starts with the...
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Ios bad() function in C++
In this article, we will discuss the std::ios::bad() function in C++ with its syntax and examples. The std::ios class is the root class for every single standard input/output stream in C++. It provides numerous flags that indicate the current state of the stream, one of which is...
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Global constant in C++
A global constant in the C++ programming language is a variable whose value stays constant during program execution and is declared and defined outside of any functions. The const keyword is used to declare variables as constants to ensure that a variable's value cannot be changed...
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