javascript - 将数组项复制到另一个数组中(Copy array items into another array)

Question

I have a JavaScript array dataArray which I want to push into a new array newArray .

(我有一个JavaScript数组dataArray ，我想将其推入一个新的数组newArray 。)

Except I don't want newArray[0] to be dataArray .

(除了我不希望newArray[0]成为dataArray 。)

I want to push in all the items into the new array:

(我想将所有项目推入新数组：)

var newArray = [];

newArray.pushValues(dataArray1);
newArray.pushValues(dataArray2);
// ...

or even better:

(甚至更好：)

var newArray = new Array (
   dataArray1.values(),
   dataArray2.values(),
   // ... where values() (or something equivalent) would push the individual values into the array, rather than the array itself
);

So now the new array contains all the values of the individual data arrays.

(所以现在新数组包含各个数据数组的所有值。)

Is there some shorthand like pushValues available so I don't have to iterate over each individual dataArray , adding the items one by one?

(有没有类似pushValues简写，所以我不必迭代每个dataArray ，逐个添加项目？)

  ask by bba translate from so

Answer 1

Use the concat function, like so:

(使用concat函数，如下所示：)

var arrayA = [1, 2];
var arrayB = [3, 4];
var newArray = arrayA.concat(arrayB);

The value of newArray will be [1, 2, 3, 4] ( arrayA and arrayB remain unchanged; concat creates and returns a new array for the result).

(newArray的值为[1, 2, 3, 4] （ arrayA和arrayB保持不变; concat为结果创建并返回一个新数组）。)