String methods

Question 1

charAt()

Answer 1

Returns the character at the specified index (position).

Question 2

charCodeAt()

Answer 2

Returns the Unicode of the character at the specified index.

Question 3

codePointAt()

Answer 3

Returns a non-negative integer that is the Unicode code point value at the given position.

Question 4

concat()

Answer 4

Joins two or more strings, and returns a new joined strings.

Question 5

endsWith()

Answer 5

Checks whether a string ends with specified string/characters.

Question 6

includes()

Answer 6

Checks whether a string contains the specified string/characters.

Question 7

indexOf()

Answer 7

Returns the position of the first found occurrence of a specified value in a string.

Question 8

lastIndexOf()

Answer 8

Returns the position of the last found occurrence of a specified value in a string.

Question 9

localeCompare()

Answer 9

Compares two strings in the current locale.

Question 10

match()

Answer 10

Searches a string for a match against a regular expression, and returns the matches.

Question 11

matchAll()

Answer 11

Returns an iterator of all results matching a string against a regular expression.

Question 12

normalize()

Answer 12

Returns the Unicode Normalization Form of a given string.

Question 13

padEnd()

Answer 13

Pads the current string with another string (repeated, if needed) until it reaches a given length, starting at the end of the current string.

Question 14

padStart()

Answer 14

Pads the current string with another string (repeated, if needed) until it reaches a given length, starting at the beginning of the current string.

Question 15

repeat()

Answer 15

Returns a new string with a specified number of copies of an existing string.

Question 16

replace()

Answer 16

Searches a string for a value or a regular expression, and returns a new string where the specified values are replaced.

Question 17

replaceAll()

Answer 17

Returns a new string with all matches of a pattern replaced by a replacement.

Question 18

search()

Answer 18

Searches a string for a specified value, or regular expression, and returns the position of the match.

Question 19

slice()

Answer 19

Extracts a part of a string and returns the extracted part in a new string.

Question 20

split()

Answer 20

Splits a string into an array of substrings.

Question 21

startsWith()

Answer 21

Checks whether a string begins with specified characters.

Question 22

substring()

Answer 22

Extracts the characters from a string, between two specified indices.

Question 23

toLowerCase()

Answer 23

Converts a string to lowercase letters.

Question 24

toUpperCase()

Answer 24

Converts a string to uppercase letters.

Question 25

trim()

Answer 25

Removes whitespace from both ends of a string.

Question 26

trimEnd()

Answer 26

Removes whitespace from the end of a string.

Question 27

trimStart()

Answer 27

Removes whitespace from the beginning of a string.

Question 28

valueOf()

Answer 28

Returns the primitive value of a string object.