[Solved] You want to filter out falsy values from this array in Ruby: arr = [false, nil, 0, "", [], true] Which code correctly returns only truthy values? | Ruby

Ruby - Operators and Expressions

You want to filter out falsy values from this array in Ruby:

arr = [false, nil, 0, "", [], true]

Which code correctly returns only truthy values?

Aarr.select { |v| v }

Barr.reject { |v| v }

Carr.select { |v| v != false }

Darr.select { |v| v == true }

Step-by-Step Solution

Solution:

Step 1: Understand filtering truthy values
Using select { |v| v } keeps only truthy values because v in condition is true for truthy values.
Step 2: Analyze other options
arr.select { |v| v != false } keeps nil (nil != false); arr.reject { |v| v } rejects truthy values; arr.select { |v| v == true } keeps only true, missing other truthy values.
Final Answer:
arr.select { |v| v } -> Option A
Quick Check:
Use select with block returning value for truthy filter [OK]

Quick Trick: Use select { |v| v } to keep truthy values [OK]

Common Mistakes:

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