[英]How to define type or interface for dynamic object?
Let's suppose that I have the following code:假设我有以下代码:
interface ItemsByKeyInterface {}
interface AType {
key: number;
label: string;
}
const array: AType[] = [
{ key: "a", label: "1" },
{ key: "b", label: "2" }
];
const itemsByKey: ItemsByKeyInterface = array.reduce((total, item) => {
return {
...total,
[item.key]: item
};
}, {});
How should I define ItemsByKeyInterface
properly?我应该如何正确定义ItemsByKeyInterface
? Consider that AType could be anything (anything with a key property) and the array could have an unlimited and unknown number of items (consider that key would be unique in that array)考虑 AType 可以是任何东西(任何具有 key 属性的东西),并且数组可以有无限且未知数量的项目(考虑 key 在该数组中是唯一的)
const p = itemsByKey.b.label;
Did you try this你试过这个吗
interface ItemsByKeyInterface {
[key: number]: Item;
}
interface Item { key: number; label: "1"| "2"; } interface ItemsByKeyInterface { [key: Item["key"]]: Item; }
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