Javascript-methods

Question 1

Why do we log things to the console?

Answer 1

1. Only for development and not in the production phase… (strictly for debugging and see the values).

Question 2

What is a method?

Answer 2

1. function attached to an object as a property

Question 3

How is a method different from any other function?

Answer 3

1. Syntax. function –> free floating, methods –> have to tell where the function came from.

Question 4

How do you remove the last element from an array?

Answer 4

pop() method

Question 5

How do you round a number down to the nearest integer?

Answer 5

1. round

Question 6

How do you generate a random number?

Answer 6

2. Math.random() –> between 0 and 1 (but not 1) up to .99999999999

Question 7

How do you delete an element from an array?

Answer 7

.splice()

Question 8

How do you append an element to an array?

Answer 8

.push()

Question 9

How do you break a string up into an array?

Answer 9

.split()

Question 10

Do string methods change the original string? How would you check if you weren’t sure?

Answer 10

1. No.

2. try it on the code.

Question 11

Roughly how many string methods are there according to the MDN Web docs?

Answer 11

Check online. we will not use all of them!!

mid 40

Question 12

Is the return value of a function or method useful in every situation?

Answer 12

No.

Question 13

Roughly how many array methods are there according to the MDN Web docs?

Answer 13

Check online. (roughly about 30).

Question 14

What three-letter acronym should you always include in your Google search about a JavaScript method or CSS property?

Answer 14

MDN!!!!!