Balanced brackets in TypeScript
TypeScript interview exercise on Practical, difficulty 3 of 3. Solve it in the editor beside a worked example; the tests run the moment you do.
Write isBalanced(str) that returns true when every (, [, { is closed by its matching bracket in the correct order. Other characters are ignored.
Each exercise pairs a worked example with a twin problem to solve in a real editor; the tests run the moment you do. Progress is saved in your browser, and in your account if you sign in.