[Solved] Given the following code, which option correctly filters only strings from the mixed array using .is_a?? items = ["apple", 42, :symbol, "banana", 3.14] strings = items.select { |item| ??? } | Ruby

Ruby - Variables and Data Types

Given the following code, which option correctly filters only strings from the mixed array using .is_a??

items = ["apple", 42, :symbol, "banana", 3.14]
strings = items.select { |item| ??? }

Aitem.class != String

Bitem.class == String

Citem.is_a?(Integer)

Ditem.is_a?(String)

Step-by-Step Solution

Solution:

Step 1: Understand filtering with .is_a?
We want to select only elements that are strings, so we check if each item is a kind of String.
Step 2: Compare options
item.is_a?(String) uses .is_a?(String) which returns true for strings. item.class == String uses .class == String which also works but is less flexible if subclasses exist. Options C and D filter integers or non-strings, which is incorrect.
Final Answer:
item.is_a?(String) -> Option D
Quick Check:
Use .is_a?(String) to filter strings [OK]

Quick Trick: Use .is_a?(String) to include subclasses too [OK]

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Given the following code, which option correctly filters only strings from the mixed array using .is_a??