String Methods

Question 1

What are the 2 operators used to build and concatenate strings?
What is a string method you could also use to achieve this?

Answer 1

+
+=

const str1 = 'Hello';
const str2 = 'World';
str1.concat(' ', str2);

Question 2

What are the 2 ways to access a single character in a string?

Answer 2

1. charAt() = string.charAt(i)
2. bracket notation = string[i]

*When using bracket notation for character access, attempting to delete or assign a value to these properties will not succeed

Question 3

let s= "1+2"
what does eval(s) return?

Answer 3

3

Question 4

What symbol is used for escape notation within a string literal?

Answer 4

\

Question 5

What can you include inside of string “” to indicate that the string value will continue on the next line?

Answer 5

\
let str= "This is
\a very long string";

Question 6

.includes()

1. What is it’s purpose?
2. What is the syntax?
3. What does it return?

Answer 6

1. determines whether one string can be found within another string
2. myString.includes(“word”)
3. true/false

Question 7

.endsWith()

1. What is it’s purpose?
2. What is the syntax?
3. What does it return?

Answer 7

1. determines whether a string ends with the characters of a specified string
2. myString.endsWith(“hello”)
3. true/false

Question 8

What method(s) could you use to determine if a string can be found within another string?

Answer 8

.includes()
myString.includes(“another string”)
returns true/false

indexOf()
myString.indexOf(searchTerm)
returns -1 if term does not exist in the string

Question 9

What method could you use to determine if a string ends with the characters of a specified string?

Answer 9

.endsWith()
myString.endsWith(“another string”)
returns true/false

Question 10

.indexOf()

1. What is it’s purpose?
2. What is the syntax?
3. What does it return?

Answer 10

1. returns the index of first occurring index of a specified value within a string

2. const paragraph = 'The quick brown fox jumps';
const searchTerm = 'fox';
const indexOfFirst = paragraph.indexOf(searchTerm);

3. the index of the specified value
   * returns -1 if search term does not exist