javascript - 从数组中丢失数据

Question

我从一个数组中切出 3 个元素并将它们存储到另一个数组中

array = [1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1];
rows = 3;

这是我的方法

getVertWallStruct = (array, rows) => {
    let i = 1,
        storageArr = [],
        data = [];

    for (let k = 0; k < rows*2; k++) { // everything's ok here
      storageArr.push(array.slice(k*rows, (k+1)*rows));
    }

    data = storageArr;

    console.log("storageArr - ", storageArr, " , array - ", array, " , data - ", data);

    return data;
  }

在这种情况下，storageArr 将包含空数组(就数据而言)。但是当我用 data = storageArr; 删除行时，我得到:

storageArr =  [ //storageArr should look like this in the end
  [1, 1, 1],
  [0, 1, 1],
  [1, 1, 1],
  [1, 1, 1],
  [0, 1, 1],
  [1, 1, 1]
]

为什么我会失去值(value)观？

更新: 即使我从其中一个答案中复制粘贴代码 - 方法也会返回空数据。为什么？

代码如下:

getVertWallStruct = (array, rows) => {
    console.log(array, rows); //okay here
   
    let iterator = array.values()
    let out = []
    for (let i = 0;i < ~~(array.length / rows); i++){
      out.push([iterator.next().value, iterator.next().value, iterator.next().value])
    }
    console.log(out); //empty ???
    
    return out;
  }

Answer 1

一种可能的方法是使用数组迭代器:

The values() method returns a new Array Iterator object that contains the values for each index in the array. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_objects/Object/values

const array = [1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1]
let iterator = array.values()
let out = []
for (let i = 0;i < ~~(array.length / 3);i++){
  out.push([iterator.next().value, iterator.next().value, iterator.next().value])
}
console.log(out)

---

更新，这看起来工作正常:

Update: Even when I copy-pasted code from one of the answers - method returns empty data. Why?

getVertWallStruct = (array, rows) => {
    let iterator = array.values()
    let out = []
    for (let i = 0;i < ~~(array.length / rows); i++){
      out.push([iterator.next().value, iterator.next().value, iterator.next().value])
    }
    return out;
  };

console.log(
  getVertWallStruct([1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1], 3)
)