Q1111. What are compose and pipe functions?
The "compose" and "pipe" are two techniques commonly used in functional programming to simplify complex operations and make code more readable. They are not native to Jav...
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Q1112. What is module pattern?
Module pattern is a designed pattern used to wrap a set of variables and functions together in a single scope returned as an object. JavaScript doesn't have access specif...
Q1113. What is Function Composition?
It is an approach where the result of one function is passed on to the next function, which is passed to another until the final function is executed for the final result...
Q1114. What are the phases of execution context?
The execution context in JavaScript is a data structure that stores the information necessary for executing a piece of code. It includes the code itself, the values of th...
Q1115. What are the examples of built-in higher order functions?
There are several built-in higher order functions exists on arrays, strings, DOM and promise methods in javascript. These higher order functions provides significant leve...
Q1116. What are the benefits higher order functions?
A **Higher-Order Function (HOF)** in JavaScript is a function that either accepts one or more functions as arguments, or returns a function as its result (leveraging firs...
Q1117. How do you create polyfills for map, filter and reduce methods?
The polyfills for array methods such as map, filter and reduce methods can be created using array prototype. 1. **map:** The built-in `Array.map` method syntax will be he...
Q1118. What is the difference between map and forEach functions?
Both map and forEach functions are used to iterate over an arrays but there are some differences in their functionality. 1. **Returning values:** The `map` method returns...
Q1119. Give an example of statements affected by automatic semicolon insertion?
The javascript parser will automatically add a semicolon while parsing the source code. For example, the below common statements affected by Automatic Semicolon Insertion...
Q1120. What are the event phases of a browser?
There are 3 phases in the lifecycle of an event propagation in JavaScript, 1. **Capturing phase:** This phase goes down gradually from the top of the DOM tree to the targ...