What's the difference between the "var" keyword and the new "let" keyword which appears in ECMAScript 6 ?

var data = [1, 2, 3, 4, 5, 6]; data.shift(); What does data look like?

var a = new Boolean(false); What is (typeof a)?

Which String prototype method is capable of removing a character from a string?

Different ways to affect the 'this' reference in a function?

Which type does NOT exist in javascript?

The type attribute value for javascript is ____.

The switch statement case value can evaluate to all of the following except ____.

The static method ________ of class string returns a formatted string.

Regular expression patterns consist of literal characters and ____.

Parseint is a method in the _______ class.