如何在不使用AS3中的反向方法的情况下反转数组？

How can you reverse an array without using the reverse() method?

如何在不使用reverse()方法的情况下反转数组?

public class Main extends Sprite
{
    private var _reversedList:Array = new Array();      

    public function Main()
    {   
        var yourShoppingList:Array = ["Milk","Bread","Eggs","Cereal","Cheese","Ham"];
        shoppingList(yourShoppingList);
        trace("The original array was " + yourShoppingList + " and now it is reversed as " + _reversedList + ".");
    }

    private function shoppingList(items:Array):Array {
        while(items.length){
            var lastItem:String = items.pop();
            _reversedList.unshift(lastItem);
        }
        return _reversedList;
    }
}

This is what I have so far. I tried using _reversedList.unshift(items.pop()); but it was giving me an error, so I ended up creating a variable, and now it seems fine? But regardless, it's not reversing the Array, and I'm not sure why.

这就是我到目前为止所拥有的。我尝试使用_reversedList.unshift(items.pop());但它给了我一个错误,所以我最终创建了一个变量,现在看起来很好吗?但无论如何,它并没有扭转数组,我不知道为什么。

Thank you for your time and help. I really appreciate it.

感谢您的时间和帮助。对此,我真的非常感激。

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1 个解决方案

#1

Changing

_reversedList.unshift(lastItem);

to

_reversedList.push(lastItem);

works for me. Taking the last item and pushing it in as the first item on the new array.

适合我。取最后一项并将其作为新阵列上的第一项推入。