Variables in JavaScript are containers used to store data values. They can hold different types of data such as numbers, strings, objects, and more. In JavaScript, a variable can be declared using the keywords var
, let
, or const
.
Here's a simple example of declaring variables:
let name = "John"; // String variable
const age = 30; // Number variable
var isStudent = true; // Boolean variable
How do I avoid rehashing overhead with std::set in multithreaded code?
How do I find elements with custom comparators with std::set for embedded targets?
How do I erase elements while iterating with std::set for embedded targets?
How do I provide stable iteration order with std::unordered_map for large datasets?
How do I reserve capacity ahead of time with std::unordered_map for large datasets?
How do I erase elements while iterating with std::unordered_map in multithreaded code?
How do I provide stable iteration order with std::map for embedded targets?
How do I provide stable iteration order with std::map in multithreaded code?
How do I avoid rehashing overhead with std::map in performance-sensitive code?
How do I merge two containers efficiently with std::map for embedded targets?