es6-destructuring

Question 1

What is destructuring, conceptually?

Answer 1

unpacking values from arrays, or properties from objects into variables

Question 2

What is the syntax for Object destructuring?

Answer 2

let {
propertyname: variablename
}=objectname
before the colon is the property of the object and after the colon is the variable

Question 3

What is the syntax for Array destructuring?

Answer 3

let num = [1,2,3,4]
let [a,b,c,d]=num
a=1, b=2, c=3, d=4

Question 4

How can you tell the difference between destructuring and creating Object/Array literals?

Answer 4

the object/array variable name is declared after the object/array literal for destructuring;
let object/array literal = variableName instead of let variableName=object/array literal