ReasonJun

In JavaScript, a Map is a built-in data structure that allows you to store key-value pairs, where both the keys and values can be of any type. It provides an efficient way to associate values with unique keys and perform operations such as insertion, retrieval, and deletion. const myMap = new Map(); // creating a new Map const myMap = new Map([ // initialize a Map ['key1', 'value1'], ['key2', 'v..

In JavaScript, there are several array methods that do not mutate the original array. Instead of modifying the array in place, they return a new array with the desired modifications. Here are some commonly used array methods that have non-mutating behavior: concat: The concat() method is used to merge two or more arrays and returns a new array without modifying the existing arrays. const array1 ..

In JavaScript, Higher-Order Functions (HoFs) are functions that can take other functions as arguments or return functions as their results. HoFs are a fundamental concept in functional programming and enable powerful and flexible ways to work with functions. Here are some key aspects and characteristics of Higher-Order Functions in JavaScript: Functions as Arguments: HoFs can accept other functi..