Block given? check in Ruby - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if a block is given.

Ruby

def greet
  if [1]
    yield
  else
    puts "No block given"
  end
end

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

Ablock?

Bblock_given?

Cblock_given

Dgiven_block?

Attempts:

3 left

💡 Hint

Common Mistakes

Using block_given without the question mark

Using block? which is not a Ruby method

Using given_block? which does not exist

The method block_given? returns true if a block is passed to the method.

2fill in blank

medium

Complete the code to print a message only if a block is given.

Ruby

def check
  puts "Block is given" if [1]
end

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

Ablock_given?

Bblock_given

Cgiven_block?

Dblock?

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting the question mark in block_given?

Using block_given without parentheses

block_given? returns true if a block is passed, so the message prints only then.

3fill in blank

hard

Fix the error in the code to correctly check for a block.

Ruby

def run
  if [1]
    yield
  else
    puts "No block"
  end
end

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

Ablock_given?

Bblock_given

Cblock?

Dgiven_block?

Attempts:

3 left

💡 Hint

Common Mistakes

Using block_given without question mark

Using block? which is not a Ruby method

block_given? is the correct method to check if a block is passed.

4fill in blank

hard

Fill both blanks to create a hash with word lengths only if block is given and length > 3.

Ruby

lengths = {word: [1] for word in words if [2]

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

Aword.length

Bblock_given?

Cword.length > 3

Dyield

Attempts:

3 left

💡 Hint

Common Mistakes

Using block_given? as a condition inside the hash comprehension

Using yield incorrectly in the hash comprehension

We want the length of each word as the value and only include words longer than 3 characters.

5fill in blank

hard

Fill all three blanks to create a hash with uppercase keys and values only if block is given and value > 0.

Ruby

result = { [1]: [2] for [3], v in data.items() if block_given? && v > 0 }

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

Ak.upcase

Bv

Ck

Dkey

Attempts:

3 left

💡 Hint

Common Mistakes

Using key instead of k as loop variable

Not converting keys to uppercase

Using block_given? incorrectly in the comprehension

Keys are converted to uppercase with k.upcase, values are v, and the loop variables are k and v.