Question

随意将代码复制并粘贴到fla中。它应该可以跟踪变量。

我正在尝试创建一个匹配游戏的孩子。它为字母表选择一个字母，并要求他们从3个选项中找到该字母。我也将随机选择他们选择的3个字母，但它还没有在此代码中。

我的问题是大多数情况下它是使用“ POP ”删除数组var但有时我得到 DUPLICATES ，有时会出现 NULL < / strong>即可。我在这做错了什么？

import flash.events.MouseEvent; import flash.display.*; /// Array of the Alphabet var Alphabet:Array = ["A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"]; // Arry to hold 3 unique letters var randArray:Array = new Array(); function getRandomElementOf(array:Array):Object { var idx:int=Math.floor(Math.random() * array.length); // Supposed to remove the letter so can't be chosen again array.pop() // Adds 1 of 3 letters to new array randArray.push(array[idx]); return array[idx]; } function testArray(evt:MouseEvent){ var One = getRandomElementOf(Alphabet); trace(One); var Two = getRandomElementOf(Alphabet); trace(Two); var Three = getRandomElementOf(Alphabet); trace(Three); trace("Can you find the letter " + One + "? " + randArray); // Resets the random Array randArray = new Array(); // Resets the letters forto be chosen again. Alphabet = ["A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"]; } /// button to click stage to test vars stage.addEventListener(MouseEvent.CLICK, testArray);

Answer 1

示例洗牌器，拼接字母集合中的字母：

var alphabet:Vector.<String> = new <String>[ "A", "B", "C", "D", "E", "F", "G",
                                             "H", "I", "J", "K", "L", "M", "N",
                                             "O", "P", "Q", "R", "S", "T", "U",
                                             "V", "W", "X", "Y", "Z" ];

while (alphabet.length > 0)
{
    var letter:String = alphabet.splice(int(Math.random() *
                                            alphabet.length), 1)[0];
    trace(letter);
}

示例输出：

V，M，F，E，D，U，S，L，X，K，Q，H，A，I，W，N，P，Y，J，C，T，O，R，G ，B，Z

应用于您的示例，这里有一个重置函数，用于将字母表集合重置回原始状态，一个随机字母函数，用于从字母表集合中删除单个字母，以及一个随机化字母集合的随机函数：

/** Alphabet collection */
var alphabet:Vector.<String>;

/** Reset alphabet */
function reset():void
{
    alphabet = new <String>[ "A", "B", "C", "D", "E", "F", "G",
                             "H", "I", "J", "K", "L", "M", "N",
                             "O", "P", "Q", "R", "S", "T", "U",
                             "V", "W", "X", "Y", "Z" ];
}

/** Get random letter from alphabet */
function getRandomLetter():String
{
    return (alphabet.splice(int(Math.random() *
                                alphabet.length), 1)[0]);
}

/** Shuffle alphabet collection */
function shuffleAlphabet():Vector.<String>
{
    var alphabetShuffled:Vector.<String> = new Vector.<String>();

    while (alphabet.length > 0)
    {
        alphabetShuffled.push(getRandomLetter());
    }

    return alphabetShuffled;
}

以下内容从字母表中拉出一个随机字母，并显示整个字母组合：

// get a random letter:
reset();
var randomLetter:String = getRandomLetter();

trace("Can you find the letter: " + randomLetter + "?");

// display entire alpha shuffled:
reset();
trace(shuffleAlphabet());

游戏输出示例：

  你能找到这封信：Q？
  R，I，U，J，Y，d，K，W，T，F，N，G，A，P，X，H，Q，L，S，O，C，V，M，Z，E，乙

  你能找到这封信：P？
  I，F，C，S，J，P，Q，M，d，T，H，X，O，V，W，G，K，A，N，Y，L，U，Z，R，B， Ë

  你能找到这封信：S？
  B，U，O，S，C，N，I，E，W，L，P，Q，Z，R，A，G，J，K，Y，M，T，V，X，d，H， ˚F

Answer 2

方法Array.splice（）

而不是array.pop（）;

我明白了。

AS3从Alphabet数组中获取随机唯一字符

2 个答案: