Projectile Factory + Copy/Paste Detector (Mobile-Friendly)

Controls

Mode: Before (Copy/Paste)

Projectile type

Speed

Autofire (shots/sec)

Duplication score

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Why this matters

In Before, Laser/FireBall/Missile repeat the same logic (copy/paste).

In After, shared behavior moves into Projectile and subclasses only specify what’s different.

duplicated line

unique line

Inheritance Tree (After)

Switch to “After” to view.

Live Demo + Code Comparison

Code shown is Java-like pseudocode (teaching artifact)

Laser

FireBall

Missile