You have an array of user ages: [15, 22, 17, 30]. Use array_map to create a new array that labels each age as "minor" if under 18, or "adult" otherwise. Which code snippet correctly does this?

hard📝 Application Q8 of 15

PHP - Array Functions

You have an array of user ages: [15, 22, 17, 30]. Use array_map to create a new array that labels each age as "minor" if under 18, or "adult" otherwise. Which code snippet correctly does this?

A$labels = array_map(fn($age) => $age == 18 ? 'minor' : 'adult', [15, 22, 17, 30]);

B$labels = array_map(fn($age) => if ($age < 18) { 'minor' } else { 'adult' }, [15, 22, 17, 30]);

C$labels = array_map(fn($age) => $age > 18 ? 'minor' : 'adult', [15, 22, 17, 30]);

D$labels = array_map(fn($age) => $age < 18 ? 'minor' : 'adult', [15, 22, 17, 30]);

Step-by-Step Solution

Solution:

Step 1: Understand the condition for labeling
Ages under 18 are "minor", 18 or older are "adult".
Step 2: Check the ternary operator usage
$labels = array_map(fn($age) => $age < 18 ? 'minor' : 'adult', [15, 22, 17, 30]); correctly uses ternary: $age < 18 ? 'minor' : 'adult'.
Final Answer:
$labels = array_map(fn($age) => $age < 18 ? 'minor' : 'adult', [15, 22, 17, 30]); -> Option D
Quick Check:
Correct ternary condition for labeling [OK]

Quick Trick: Use ternary inside array_map callback for conditional labels [OK]

Common Mistakes:

Using if statement inside arrow function incorrectly
Reversing condition logic
Checking equality instead of less than

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You have an array of user ages: [15, 22, 17, 30]. Use array_map to create a new array that labels each age as "minor" if under 18, or "adult" otherwise. Which code snippet correctly does this?

Step 1: Understand the condition for labeling

Step 2: Check the ternary operator usage

Final Answer:

Quick Check:

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