Typescript 排序更改数组类型

假设我有以下类型:

interface MyType { 
    myProperty: [a: string[], b: string[]] 
}

现在我想创建一个该类型的数组:

const array1: MyType[] = [
    {myProperty: [["Hello", "World"], []]},
    {myProperty: [["Hello"], []]},
];

如果我try 对该数组进行排序:

const array2: MyType[] = [
    {myProperty: [["Hello", "World"], []]},
    {myProperty: [["Hello"], []]},
].sort((a,b) => a.myProperty[0].length - b.myProperty[0].length);

我得到一个错误:

Type '{ myProperty: string[][]; }[]' is not assignable to type 'MyType[]'.

我try 了各种解决方案:

• 使用排序初始化数组(Lambda)

  const array2: MyType[] = [
      {myProperty: [["Hello", "World"], []]},
      {myProperty: [["Hello"], []]},
  ].sort((a,b) => a.myProperty[0].length - b.myProperty[0].length);
  

  值没有正确的类型

• 使用排序初始化数组(函数)

  const array3: MyType[] = [
      {myProperty: [["Hello", "World"], []]},
      {myProperty: [["Hello"], []]},
  ].sort(compareMyType);
  function compareMyType(a: MyType, b: MyType) { 
      return a.myProperty[0].length - b.myProperty[0].length; 
  }
  

  排序函数没有正确的类型并且值没有正确的类型

• 选角至MyType[]:

  const array4: MyType[] = ([
      {myProperty: [["Hello", "World"], []]},
      {myProperty: [["Hello"], []]},
  ] as MyType[]).sort(compareMyType);
  const array5: MyType[] = ([
      {myProperty: [["Hello", "World"], []]},
      {myProperty: 5},
  ] as MyType[]).sort(compareMyType);
  

  铸造 suppress 可能导致运行时错误的错误

• 排序已初始化的数组

  const array1: MyType[] = [
  
      const array2: MyType[] = [
      {myProperty: [["Hello", "World"], []]},
      {myProperty: [["Hello"], []]},
  ];
  
  const array6: MyType[] = array1.sort(compareMyType);
  

  没有错误.

为什么这有效，而其他try 却无效(编译器或运行时错误)？有更好的/其他解决方案吗？

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