Explain how to use Partial types in TypeScript.
Instruction: Describe what Partial types are and provide a practical example of their use.
Context: This question assesses the candidate's understanding of utility types in TypeScript, focusing on the Partial type which helps in making all properties of a type optional.
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Partial<T> makes each top-level property of T optional. It is useful for a typed patch that may change only some fields, including an empty patch. It does not recursively make nested objects partial or implement the update itself.
interface UserProfile { name: string; email: string; age: number } function updateProfile( current: Readonly<UserProfile>, changes: Partial<UserProfile> ): UserProfile { return { name: changes.name === undefined ?...