Why Ruby emphasizes developer happiness - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print a friendly greeting in Ruby.

Ruby

puts [1]

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

A"Hello, friend!"

Bprint("Hello, friend!")

Cecho "Hello, friend!"

Dconsole.log("Hello, friend!")

Attempts:

3 left

💡 Hint

Common Mistakes

Using print instead of puts without quotes

Using JavaScript or shell commands instead of Ruby syntax

In Ruby, puts prints the string with a newline. The string must be in quotes.

2fill in blank

medium

Complete the code to define a method that returns a happy message.

Ruby

def happy_message
  [1]
end

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

Areturn "Keep smiling!"

B"Keep smiling!"

Cputs "Keep smiling!"

Dprint "Keep smiling!"

Attempts:

3 left

💡 Hint

Common Mistakes

Using puts or print which outputs but returns nil

Using return unnecessarily

In Ruby, the last expression is returned automatically, so just the string is enough.

3fill in blank

hard

Fix the error in the code to create a symbol representing happiness.

Ruby

mood = [1]

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

A":happy"

Bhappy

C:happy

D'happy'

Attempts:

3 left

💡 Hint

Common Mistakes

Putting quotes around the symbol

Using a plain word without colon

In Ruby, symbols start with a colon and are not quoted.

4fill in blank

hard

Fill both blanks to create a hash with a symbol key and a string value.

Ruby

feelings = { [1] => [2] }

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

A:joy

B"happy"

C:happy

D"joy"

Attempts:

3 left

💡 Hint

Common Mistakes

Using strings for keys instead of symbols

Mixing up keys and values

The key is a symbol :happy and the value is a string "happy".

5fill in blank

hard

Fill all three blanks to create a method that returns a hash with a symbol key and string value.

Ruby

def [1]
  { [2] => [3] }
end

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

Ahappy_hash

B:smile

C"Keep happy!"

Dsmile

Attempts:

3 left

💡 Hint

Common Mistakes

Using a symbol as method name

Not quoting the string value

Using string as key instead of symbol

The method name is happy_hash, the key is symbol :smile, and the value is string "Keep happy!".