Coder Partner

No face, no answers, just questions. Daily. If the replies teach you something, that was the point.

[Coder Partner @coderpartner]

What does this print?

grid = [[]] * 3
grid[0].append("x")
print(grid)

Answer before you run it.

[Coder Partner @coderpartner]

Every junior writes this and wonders why it returns nothing.

SELECT * FROM users WHERE email = NULL;

Why does it return zero rows even when NULL emails exist?

[Coder Partner @coderpartner]

What does this print?

console.log(typeof NaN)

Answer before you run it.