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在Typescript中使用方括号表示法更新对象的嵌套属性

在Typescript中,可以使用方括号表示法来更新对象的嵌套属性。方括号表示法允许我们通过变量或表达式来访问对象的属性。

下面是一个示例代码,演示了如何使用方括号表示法更新对象的嵌套属性:

代码语言:txt
复制
interface MyObject {
  nested: {
    property: string;
  };
}

const obj: MyObject = {
  nested: {
    property: "old value",
  },
};

const propertyName = "nested";
const nestedPropertyName = "property";
const newValue = "new value";

obj[propertyName][nestedPropertyName] = newValue;

console.log(obj.nested.property); // 输出: "new value"

在上面的示例中,我们定义了一个接口MyObject,它包含一个嵌套属性nested,其中又包含一个属性property。我们创建了一个名为obj的对象,并将其初始值设置为{ nested: { property: "old value" } }

然后,我们使用方括号表示法来更新对象的嵌套属性。通过将变量propertyName设置为"nested",我们可以访问obj对象的nested属性。然后,通过将变量nestedPropertyName设置为"property",我们可以访问nested对象的property属性。最后,我们将newValue赋值给obj[propertyName][nestedPropertyName],从而更新了嵌套属性的值。

最后,我们使用console.log打印出obj.nested.property的值,可以看到它已经被成功更新为"new value"

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