High Order Function: A function Accepts functions as parameters and/or Returns a function. Extending the function whi…

Truthiness narrowing const truthinessNarrow = (a: 1 | '1') => { if(a === 1) { console.log(…

Note: How to simulate componentWillUnmount in Hooks? // passing the empty array([]) useEffect(() => { // …

Non-null Assertion Operator Sometimes the result may be  null , like this. const myApp = document.getElementById(&quo…

1. unknown will show errors, but any not let a: unknown = 1 a.say() // errors: Object is of type 'unknown'.ts…

1. Question You are given n points in the plane that are all distinct, where points[i] = [xi, yi]. A boomerang is a t…

1. Errors, When access customer properties. window.info // error: Property 'info' does not exist on type '…