Equality check Memes

Peacefully sleeping until your brain suddenly screams: "WAIT! That code uses a single equals sign for comparison instead of double equals! That's an assignment, not a condition check!" That single character difference between if (user = admin) and if (user == admin) means you're not checking if user equals admin—you're literally making user become admin and then checking if that assignment succeeded (which it always will). Congratulations, you just gave everyone admin access!

Nothing says "I'm a competent programmer" like waking up at 3:25am to an emergency alert that 72 is dangerously higher than... 72. Classic floating point comparison fail. Somewhere in that thermostat's code, 72.0001 is being compared to 72 with the == operator instead of a proper threshold check. The developer who wrote this is probably the same person who thinks SQL injection is just a fancy way to administer medicine. Future archaeologists will find this thermostat and conclude our civilization collapsed because we couldn't figure out that 72.00000001 ≈ 72.