Given the array animals = ["lion", "tiger", "bear", "leopard"], which code snippet uses the match operator to find all animals containing the substring ea?

hard📝 Application Q8 of 15

Ruby - Regular Expressions

Given the array animals = ["lion", "tiger", "bear", "leopard"], which code snippet uses the match operator to find all animals containing the substring ea?

Aanimals.find { |a| a =~ /ea/ }

Banimals.select { |a| a =~ /ea/ }

Canimals.map { |a| a =~ /ea/ }

Danimals.reject { |a| a =~ /ea/ }

Step-by-Step Solution

Solution:

Step 1: Understand the goal
We want all elements containing "ea".
Step 2: Use select with =~
Select returns all elements where the block is truthy; =~ returns index or nil, so non-nil is truthy.
Step 3: Analyze options
animals.select { |a| a =~ /ea/ } correctly selects all matching elements. animals.find { |a| a =~ /ea/ } returns only the first match. animals.map { |a| a =~ /ea/ } returns indices or nils, not filtered elements. animals.reject { |a| a =~ /ea/ } rejects matches.
Final Answer:
animals.select { |a| a =~ /ea/ } -> Option B
Quick Check:
select filters all matching elements [OK]

Quick Trick: Use select with =~ to filter all matching strings [OK]

Common Mistakes:

Using find instead of select to get all matches
Using map which returns indices, not filtered elements
Using reject which excludes matches

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Given the array animals = ["lion", "tiger", "bear", "leopard"], which code snippet uses the match operator to find all animals containing the substring ea?

Step 1: Understand the goal

Step 2: Use select with =~

Step 3: Analyze options

Final Answer:

Quick Check:

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