是否可以让多个键指向同一个对象？

Question

Basically I want to call myList[i] and get the same value for i = 1, 2, 3, 4 then a second value for 5, 6, 7, 8 and so on. I don't really want to copy-paste the value for 1 into 2, 3, 4.

Answer 1

You can try using this -

myList[Math.floor((i-1)/4)]

where i = 1, 2, 3, 4 ...

But if i starts from 0 , then

myList[Math.floor(i/4)]

Adjust the +/- 1 according to your requirements.

Where 4 is the block size to which you need to divide the array with.

Answer 2

You can use an array of objects

 const arr = [...Array(4).fill({ value: 1 }), ...Array(4).fill({ value: 3 })]; console.log(arr[0].value); console.log(arr[1].value); console.log(arr[2].value); console.log(arr[3].value); console.log(arr[4].value); console.log(arr[5].value); console.log(arr[6].value); console.log(arr[7].value); arr[0].value = 2; console.log(arr[0].value); console.log(arr[1].value); console.log(arr[2].value); console.log(arr[3].value); console.log(arr[4].value); console.log(arr[5].value); console.log(arr[6].value); console.log(arr[7].value);

Each element is a reference to the same object.

That's not possible with an array of primitives.