Subclass with < operator in Ruby - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a subclass of Array.

Ruby

class MyArray < [1]
end

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AString

BHash

CArray

DObject

Attempts:

3 left

💡 Hint

Common Mistakes

Using Hash or String instead of Array as the superclass.

Forgetting the < operator.

The subclass MyArray inherits from Array using the < operator.

2fill in blank

medium

Complete the code to override the < operator to compare lengths.

Ruby

class MyArray < Array
  def <(other)
    self.length [1] other.length
  end
end

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A<

B>

C==

D<=

Attempts:

3 left

💡 Hint

Common Mistakes

Using == or > instead of < for comparison.

Comparing the arrays directly instead of their lengths.

The < method compares the length of self with other using the < operator.

3fill in blank

hard

Fix the error in the method to correctly compare array lengths.

Ruby

class MyArray < Array
  def <(other)
    self.size [1] other.size
  end
end

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A==

B<=

C>

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using == or > instead of <.

Using length and size inconsistently.

The < method should use the < operator to compare sizes for correct behavior.

4fill in blank

hard

Fill both blanks to complete the subclass and define the < operator comparing sums.

Ruby

class MyArray [1] Array
  def <(other)
    self.sum [2] other.sum
  end
end

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

A<

B>

C<=

Attempts:

3 left

💡 Hint

Common Mistakes

Using > or >= instead of < or <=.

Forgetting to inherit properly.

The subclass inherits from Array using <. The < method compares the sums using the <= operator.

5fill in blank

hard

Fill all three blanks to define a subclass with < operator comparing max values.

Ruby

class MyArray [1] Array
  def <(other)
    self.max [2] other.max && self.min [3] other.min
  end
end

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

A<

B<=

C>

D>=

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up comparison operators.

Using > or < inconsistently.

The subclass inherits from Array using <. The < method compares max values with <= and min values with >=.