TypeScript 面接の質問と回答
関連する比較
質問 16. How do you use optional parameters in TypeScript?
Optional parameters in TypeScript are denoted by adding a '?' after the parameter name in the function declaration.
質問 17. What is the purpose of the 'never' type in TypeScript?
The 'never' type in TypeScript represents values that never occur, such as functions that always throw exceptions or never return.
質問 18. How does TypeScript achieve type inference?
TypeScript uses a mechanism called type inference to automatically determine and assign types to variables based on their values and usage.
質問 19. What is the 'readonly' modifier in TypeScript?
The 'readonly' modifier in TypeScript is used to make properties of an object immutable after their initial assignment.
質問 20. Explain the concept of union types in TypeScript.
Union types in TypeScript allow a variable to hold values of multiple types, separated by the '|' symbol.
ユーザー評価で最も役立つ内容:
- What is TypeScript?
- Explain the difference between 'let' and 'const' in TypeScript.
- What are the basic data types in TypeScript?
- How do you define an interface in TypeScript?
- What is the 'any' type in TypeScript?