Q311. Is Node.js completely single threaded?
Node is a single thread, but some of the functions included in the Node.js standard library(e.g, fs module functions) are not single threaded. i.e, Their logic runs outsi...
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Q312. What is RxJS?
RxJS (Reactive Extensions for JavaScript) is a library for implementing reactive programming using observables that makes it easier to compose asynchronous or callback-ba...
Q313. What is the difference between Function constructor and function declaration?
The functions which are created with `Function constructor` do not create closures to their creation contexts but they are always created in the global scope. i.e, the fu...
Q314. What is an async function?
An async function is a function declared with the `async` keyword which enables asynchronous, promise-based behavior to be written in a cleaner style by avoiding promise ...
Q315. What is an environment record?
According to ECMAScript specification 262 (9.1): > [Environment Record](https://262.ecma-international.org/12.0/#sec-environment-records) is a specification type used to ...
Q316. How do you create your own bind method using either call or apply method?
The custom bind function needs to be created on Function prototype inorder to use it as other builtin functions. This custom function should return a function similar to ...
Q317. What are the differences between pure and impure functions?
Some of the major differences between pure and impure function are as below, | Pure function | Impure function | | ----------------------------------- | -----------------...
Q318. What is referential transparency?
An expression in javascript that can be replaced by its value without affecting the behaviour of the program is called referential transparency. Pure functions are refere...
Q319. What are the possible side-effects in javascript?
A side effect is the modification of the state through the invocation of a function or expression. These side effects make our function impure by default. Below are some ...
Q320. 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...