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Programming
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const users: string[] = [];
const firstUser = users[0];
firstUser.toUpperCase();
With strict: true and nothing else, does this compile?
TypeScript Type System
45 Questions That Trip Up Experienced Developers
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fns = [lambda: i for i in range(3)]
print([f() for f in fns])
What is printed?
Python Semantics
45 Questions That Trip Up Experienced Developers
1
console.log(["1", "2", "3"].map(parseInt));
What is printed?
JavaScript Semantics
45 Questions That Trip Up Experienced Developers
1
SELECT NULL = NULL AS same;
What does the query return?
SQL Semantics
45 Questions That Trip Up Experienced Developers