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）。)