medium.com- Things Most JS Devs Don’t Know

• task Q. What are the differences in JS string created like ’ test’ vs new String(‘test’)?
• js_arguments can be used to find the callee when creating stack trace.

const arr2 = arr.constructor(); // is like new Array()

Tried to code into implementation of Array, it gives native code

const arrOfUndefined = [,,,] // one less undefined than comma const arrUn = new Array(3);

everything_in_JS_is_object

const arr = []; arr.someProp = ‘Value is here’; console.log(arr); // [what: ‘am I doing here?

JavaScript_this

To get global this in object #function_expressions

Javascript_Functions Functions are also objects and have properties like length, name and caller.

function myFunc() {
	console.log(arguments.callee.myProp)
	console.log(myFunc.myProp)
}

myFunc.myProp = 'stuff'
myFunc()
// stuff
// stuff

function_statements arehoisted

self_invoking_functions

const myString2 = (function(sentence) {
	return sentence
})('Im a sentence')