如何在Dart中合并2个列表？ [英] How to merge 2 lists in Dart?

问题描述

我正在尝试合并2个列表，因此输出如下：

I'm trying to merge 2 lists so the output is the following:

List<String> array1 = ["John", "Bob", "Fred", "June", "Tom"];
List<String> array2 = ["House", "Flat", "Bungalow"];

List<String> output = //["John", "House", "Bob", "Flat", "Fred", "Bungalow", "June", "Tom"]

如何实现？我看了颤抖库中的 zip 函数

How can I achieve this? I've had a look at the zip function in the quiver library but it only returns a list as long as the shortest list that's passed into it.

EDIT ：为澄清起见，我本质上想做的是与zip函数相同，但是如果一个数组比另一个数组长，我只想将剩余的项追加到末尾。

EDIT: To clarify, I essentially want to do the same as the zip function but if one array is longer than the other, I just want to append the left over items on to the end.

推荐答案

我不知道可以使用的任何东西，但这应该可以做您想要的：

I don't know anything ready-to-use, but this should do what you want:

import 'dart:math' as math;

void main() {
  List<String> array1 = ["John", "Bob", "Fred", "June", "Tom"];
  List<String> array2 = ["House", "Flat", "Bungalow"];

  List<String> output = List<String>(array1.length + array2.length);
  int i = 0;
  for (i; i < math.min(array1.length, array2.length); i++) {
    output[i * 2] = array1[i];
    output[i * 2 + 1] = array2[i];
  }
  print(output);
  if (array1.length != array2.length) {
    if (array1.length > array2.length) {
      output.setRange(i * 2, output.length, array1.sublist(i));
    } else {
      output.setRange(i * 2, output.length, array2.sublist(i));
    }
  }
  print(output);
}

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