Book Image

C++20 STL Cookbook

By : Bill Weinman
Book Image

C++20 STL Cookbook

By: Bill Weinman

Overview of this book

Fast, efficient, and flexible, the C++ programming language has come a long way and is used in every area of the industry to solve many problems. The latest version C++20 will see programmers change the way they code as it brings a whole array of features enabling the quick deployment of applications. This book will get you up and running with using the STL in the best way possible. Beginning with new language features in C++20, this book will help you understand the language's mechanics and library features and offer insights into how they work. Unlike other books, the C++20 STL Cookbook takes an implementation-specific, problem-solution approach that will help you overcome hurdles quickly. You'll learn core STL concepts, such as containers, algorithms, utility classes, lambda expressions, iterators, and more, while working on real-world recipes. This book is a reference guide for using the C++ STL with its latest capabilities and exploring the cutting-edge features in functional programming and lambda expressions. By the end of the book C++20 book, you'll be able to leverage the latest C++ features and save time and effort while solving tasks elegantly using the STL.
Table of Contents (13 chapters)

Chapter 6: STL Algorithms

Much of the power of the STL is in the standardization of container interfaces. If a container has a particular capability, there's a good chance that the interface for that capability is standardized across container types. This standardization makes possible a library of algorithms that operate seamlessly across containers and sequences sharing a common interface.

For example, if we want to sum all the elements in a vector of int, we could use a loop:

vector<int> x { 1, 2, 3, 4, 5 };
long sum{};
for( int i : x ) sum += i;                     // sum is 15

Or we could use an algorithm:

vector<int> x { 1, 2, 3, 4, 5 };
auto sum = accumulate(x.begin(), x.end(), 0);  // sum is 15

This same syntax works with other containers:

deque<int> x { 1, 2, 3, 4, 5 };
auto sum = accumulate(x.begin(), x.end(), 0); ...