```ts const obj = {a: 1, b: 2, c: 3} // ^? const obj: { a: number; b: number; c: number; } const map = new Map(Object.entries(obj)) // ^? const map: Map<string, number> ``` <button class="playground"><a href="https://www.typescriptlang.org/play?#code/MYewdgzgLgBCBGArGBeGBvAhgLhgRgBoZ5cAmI4XAZgF8AoAegZhZgD0B+O0SWAW0wAHVDDABTAO4wAskIAUAeSRjgUAHRiwUAE4BLMRDkJEAShONmrTnSA">Playground</a></button> ## 参考 - [TypeScript でMapからObject、ObjectからMapへの変換 \- Qiita](https://qiita.com/optimisuke/items/345490109b4f3e7dba5c)