在 ActionScript (3.0) 中干净地合并两个数组? [英] Cleanly merge two arrays in ActionScript (3.0)?

问题描述

在 ActionScript(特别是 ActionScript 3.0)中合并两个排序数组的好方法是什么?生成的数组应该进行排序并且没有重复.

What's a nice way to merge two sorted arrays in ActionScript (specifically ActionScript 3.0)? The resulting array should be sorted and without duplicates.

推荐答案

要合并(连接)数组，请使用 .concat().

To merge (concatenate) arrays, use .concat().

以下是两个示例，说明如何连接数组并同时删除重复项.

Below are two examples of how you can concatenate arrays and remove duplicates at the same time.

更方便的方法:(您可以使用 中的 ArrayUtil.createUniqueCopy()as3corelib)

More convenient way: (you can use ArrayUtil.createUniqueCopy() from as3corelib)

// from as3corelib:
import com.adobe.utils.ArrayUtil;

var a1:Array = ["a", "b", "c"];
var a2:Array = ["c", "b", "x", "y"];

var c:Array = ArrayUtil.createUniqueCopy(a1.concat(a2)); // result: ["a", "b", "c", "x", "y"]

稍微快一点的方法:(您可以自己遍历数组并使用 Array.indexOf() 检查重复项)

Slightly faster way: (you can loop through the arrays yourself and use Array.indexOf() to check for duplicates)

var a1:Array = ["a", "b", "c"];
var a2:Array = ["c", "b", "x", "y"];
var a3:Array = ["a", "x", "x", "y", "z"];

var c:Array = arrConcatUnique(a1, a2, a3); // result: ["a", "b", "c", "x", "y", "z"]

private function arrConcatUnique(...args):Array
{
    var retArr:Array = new Array();
    for each (var arg:* in args)
    {
        if (arg is Array)
        {
            for each (var value:* in arg)
            {
                if (retArr.indexOf(value) == -1)
                    retArr.push(value);
            }
        }
    }
    return retArr;
}

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