String Methods

Question 1

What does String.length do?

Answer 1

Returns the length of a string (technically property)

Question 2

What does String.slice(start, end) do?

Answer 2

Extracts a part of a string (specify where it starts and ends in the parameters) and returns it in a new string.

Question 3

What does String.substring(start, end) do?

Answer 3

Extracts part of a string and returns it as a new string.

Question 4

What is the difference between substring and splice?

Answer 4

If start > stop, then substring will swap those 2 arguments. With substring, if it is NaN or negative it will treat the value as 0.

Question 5

What does String.substr(start, end) do?

Answer 5

Extracts a part of a string and returns a new string - the second parameter specifies the length of the extracted part (that is what makes it different)

Question 6

What does String.replace(thing you want to replace, replace with)

Answer 6

Replaces a specified value with another value in a string - returns a new string

Question 7

What are some limitations of String.replace()

Answer 7

Only returns the first match (use /g flag to replace all), does not change the string it is called on, case sensitive, (use /i to ignore the case)

Question 8

What does String.replaceAll() do?

Answer 8

Allows you to specify a regular expression instead of a string to be replaced - if the parameter is a regular expression it