Accessing and setting values in Ruby - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to access the value of key 'name' in the hash.

Ruby

person = {"name" => "Alice", "age" => 30}
puts person[[1]]

Drag options to blanks, or click blank then click option'

A"name"

B:name

C"age"

D:age

Attempts:

3 left

💡 Hint

Common Mistakes

Using symbol keys like :name when the hash uses string keys.

Using the wrong key like "age" instead of "name".

In Ruby, to access a value in a hash with string keys, you use the string key inside brackets.

2fill in blank

medium

Complete the code to set the value of key :age to 25 in the hash.

Ruby

person = {name: "Bob", age: 20}
person[[1]] = 25
puts person[:age]

Drag options to blanks, or click blank then click option'

A"age"

B:age

C"name"

D:name

Attempts:

3 left

💡 Hint

Common Mistakes

Using string keys like "age" when the hash uses symbols.

Trying to set the value with the wrong key.

When the hash uses symbol keys, you must use the symbol to access or set values.

3fill in blank

hard

Fix the error in the code to correctly access the value of key :city.

Ruby

location = {city: "Paris", country: "France"}
puts location[[1]]

Drag options to blanks, or click blank then click option'

A"city"

B:country

C"country"

D:city

Attempts:

3 left

💡 Hint

Common Mistakes

Using string keys like "city" instead of symbol keys.

Using the wrong key like :country.

The hash uses symbol keys, so you must use :city to access the value.

4fill in blank

hard

Fill both blanks to create a hash with keys as strings and values as integers.

Ruby

scores = {"math" => [1], "science" => [2]
puts scores

Drag options to blanks, or click blank then click option'

A90

B"90"

C85

D"85"

Attempts:

3 left

💡 Hint

Common Mistakes

Using string values like "90" instead of integer 90.

Mixing string and integer types for values.

The keys are strings, so the values should be integers without quotes to represent numbers.

5fill in blank

hard

Fill all three blanks to create a hash with symbol keys and update one value.

Ruby

person = {name: [1], age: [2], city: [3]
person[:age] = 40
puts person

Drag options to blanks, or click blank then click option'

A"John"

B30

C"New York"

D"30"

Attempts:

3 left

💡 Hint

Common Mistakes

Using string "30" instead of integer 30 for age.

Not using quotes for string values.

Symbol keys are used with values: a string for name and city, and an integer for age. The age is updated later.