AS3数组学习

返回索引，查找不到返回-1

var arr:Array = ["a","b","c","d","e","f","g"];

arr.indexOf("e");

arr.indexOf("b",2); //从第3个元素开始查找

arr.lastIndexOf("b",2); //从第3个元素反向查找
push unshift
在首尾插入元素，返回增加元素后数组的长度

var arr:Array = ["a","b","c","d","e","f","g"];

arr.push("h"); //在数组尾部插入元素h

arr.push("i","j","k"); //在数组尾部插入多个元素

arr.unshift("h"); //在数组头部插入元素h

arr.unshift("i","j","k"); //在数组头部插入多个元素
pop shift
删除首尾元素，返回被删除的元素

var arr:Array = ["a","b","c","d","e","f","g"];

arr.pop(); //删除尾元素

arr.shift(); //删除首元素
splice
删除数组一段连续的元素，返回被删除的元素数组

var arr:Array = ["a","b","c","d","e","f","g"];

arr.splice(删除点的索引,要删除的个数,新元素1,新元素2);

arr.splice(2,3,"o","p","q"); //从索引为2开始，删除3个元素，并插入3个新元素"o","p","q"

arr.splice(-2,3,"o","p","q"); //从倒数为2的索引开始，删除3个元素，并插入3个新元素"o","p","q"

arr.splice(2,3); //单纯的删除从索引2开始的3个元素(不插入)

arr.splice(2); //单纯的删除从索引2开始的所有元素(不插入)

arr.splice(2,0,"x","y","z"); //在索引2的后面插入3个新元素(不删除)
slice
获取数组中的部分元素

var arr:Array = ["a","b","c","d","e","f","g"];

var newArr:Array = arr.slice(); //浅复制数组

var newArr:Array = arr.slice(2);

var newArr:Array = arr.slice(-2);

var newArr:Array = arr.slice(2,5);
concat
将多个元素或数组拼接成一个新数组

var arr:Array = ["a","b","c","d","e","f","g"];

var newArr = arr.concat("x","y","z"); //原数组不变，新数组是原数组拼接后的结果

var newArr = arr.concat(); //浅复制数组
reverse
将数组倒序排列

var arr:Array = ["a","b","c"];

arr.reverse(); //得到"c","b","a"
sort
◆sort() 按默认排序,注意：区分大小写,数字也是按字符串来处理

var arr:Array = ["b","c","a"];

arr.sort(); //得到"a","b","c" arr = ["210","1111","30"];

arr.soft(); //得到"1111","210","30" arr = ["b","X","A","c"];

arr.sort(); //得到"A","X","b","c"

var arr:Array = ["b","C",235,"a",38,"X",8641];

trace(arr.sort()); //得到235,38,8641,C,X,a,b
◆sort(args) 按参数排序,一共有5种(注意：除了Array.RETURNINDEXEDARRAY,其它方式只要排序成功，都会实际改变数组)

sort(Array.CASEINSENSITIVE) 同sort(),不过不区分大小写,数字也是按字符串来处理
var arr = ["b","X","A","c"];

arr.sort(Array.CASEINSENSITIVE); //得到"A","b","c","X"
sort(Array.DESCENDING) 按字符串的倒序排列,区分大小写,数字也是按字符串来处理
var arr:Array = ["b","C","a","X",235,8641,38];

trace(arr.sort(Array.DESCENDING)); //得到b,a,X,C,8641,38,235
sort(Array.UNIQUESORT) 同sort(),如果数组有相同元素，则放弃排序，返回0
var arr:Array = ["b","C","a","X",235,8641,38,2365];

if(arr.sort(Array.UNIQUESORT)=="0")
{
    trace("有相同元素");
}
else
{
    trace("没有相同元素");
}
        sort(Array.RETURNINDEXEDARRAY) 同sort(),返回排序后的索引列表，原数组不变
var arr:Array = ["b","C","a","X",235,8641,38,2365];

trace(arr.sort(Array.RETURNINDEXEDARRAY)); //得到4,7,6,5,1,3,2,0

trace(arr); //得到b,C,a,X,235,8641,38,2365(原数组)
sort(Array.NUMERIC) 按数字从小到大排序,如果数组里含有非数字，会抛出异常
var arr:Array = [235,8641,38,2365];

trace(arr.sort(Array.NUMERIC)); //得到38,235,2365,8641
◆sort(函数名) 按自定义函数比较,该函数必须接受2个参数，返回值为1、-1、0

public function Sample1008()
{
    var objA:Object = {price:200,quantity:2};
    var objB:Object = {price:400,quantity:4};
    var objC:Object = {price:100,quantity:1};

    var arr:Array = [objA,objB,objC];
    trace("原数组是：");
    for(var i:int=0;i<arr.length;i++)
    {
        trace(arr[i].price);
    }
    arr.sort(Compare);
    trace("排序后的数组是：");
    for(var j:int=0;j<arr.length;j++)
    {
        trace(arr[j].price);
    }
}

private function Compare(paraA:Object,paraB:Object):int
{
var totalPriceA:int = paraA.price * paraA.quantity;
var totalPriceB:int = paraB.price * paraB.quantity;

    if(totalPriceA>totalPriceB)
    {
        return 1;
    }
    else if(totalPriceA<totalPriceB)
    {
        return -1;
    }
    else
    {
        return 0;
    }
}

/*运行结果是
原数组是：
200
400
100
排序后的数组是：
100
200
400*/
sortOn
常用于对象数组的排序

var obj1:MyClass = new MyClass();

var obj2:MyClass = new MyClass();

var obj3:MyClass = new MyClass();

obj1.orderID = 300;

obj2.orderID = 100;

obj3.orderID = 200;

var arr:Array = [obj1,obj2,obj3];

//trace(arr.sortOn("orderID"));

trace(arr.sortOn("orderID",Array.RETURNINDEXEDARRAY)); //得到索引1,2,0
every
判断数组里的每个元素是否满足某些条件，只有全部都满足才为true

public function Sample1008()
{
    //必须5个人都满70级，才可以进卡拉赞副本
    var player1:Object = {name:"wayne",level:70};
    var player2:Object = {name:"tom",level:69};
    var player3:Object = {name:"jacky",level:70};
    var player4:Object = {name:"andy",level:68};
    var player5:Object = {name:"bill",level:70};

    var playerList:Array = [player1,player2,player3,player4,player5];
    if(!playerList.every(CheckLevel))
    {
        trace("队伍中有人等级未到70，无法进入副本");
    }
}

private function CheckLevel(item:*,index:int,arr:Array):Boolean
{
    if(item.level<70)
    {
        //trace(item.name+"等级未到70,无法进入副本");
        return false;
    }
    return true;
}
map
映射器，逐个处理数组中的元素，最后生成一个修改后的新数组(不会更改原数组)

public function Sample1008()
{
    var player1:Object = {name:"wayne",level:70};
    var player2:Object = {name:"tom",level:69};
    var player3:Object = {name:"jacky",level:70};
    var player4:Object = {name:"andy",level:68};
    var player5:Object = {name:"bill",level:70};

    var playerList:Array = [player1,player2,player3,player4,player5];

    for(var i:int = 0; i<playerList.length; i++)
    {
        trace("player"+(i+1)+"的所有属性是:");
        for(var attr:String in playerList[i])
        {
            trace(attr+":"+playerList[i][attr]);
        }
    }

    //为每个玩家添加新属性"声望值"
    var newArray:Array = playerList.map(AddNewAttribute);

    trace("-----------------Map后的结果-----------------");

    for(var j:int = 0; j<newArray.length; j++)
    {
        trace("player"+(j+1)+"的所有属性是:");
        for(var attr2:String in newArray[j])
        {
            trace(attr2+":"+newArray[j][attr2]);
        }
    }
}

private function AddNewAttribute(item:*,index:int,arr:Array):Object
{
    var tmpPlayer:Object = {};
    tmpPlayer.name = item.name;
    tmpPlayer.level = item.level;
    tmpPlayer.repute = 99;
    return tmpPlayer;
}
some
判断数组里的每个元素是否满足某些条件，只要有一个满足就返回true

public function Sample1008()
{
    //主要队伍里有一个人声望达到140以上，则全队可以进副本
    var player1:Object = {name:"wayne",level:70,repute:100};
    var player2:Object = {name:"tom",level:70,repute:190};
    var player3:Object = {name:"jacky",level:70,repute:50};
    var player4:Object = {name:"andy",level:70,repute:230};
    var player5:Object = {name:"bill",level:70,repute:120};

    var playerList:Array = [player1,player2,player3,player4,player5];

    if(playerList.some(CheckRepute))
    {
        trace("可以进入副本");
    }
    else
    {
        trace("队伍里没有成员声望达到140，无法进入副本");
    }
}

private function CheckRepute(item:*,index:int,arr:Array):Boolean
{
    if(item.repute>=140)
    {
        return true;
    }
    return false;
}
filter
将数组里满足特定条件的元素提取出来，生成一个新数组

public function Sample1008()
{
    //得到队伍里所有声望达到要求的成员
    var player1:Object = {name:"wayne",level:70,repute:100};
    var player2:Object = {name:"tom",level:70,repute:190};
    var player3:Object = {name:"jacky",level:70,repute:50};
    var player4:Object = {name:"andy",level:70,repute:230};
    var player5:Object = {name:"bill",level:70,repute:120};

    var playerList:Array = [player1,player2,player3,player4,player5];

    var newArray:Array = playerList.filter(CheckRepute);

    for(var i:int=0; i<newArray.length; i++)
    {
        for(var attr:String in newArray[i])
        {
            trace(attr+":"+newArray[i][attr]);
        }
    }
}

private function CheckRepute(item:*,index:int,arr:Array):Boolean
{
    if(item.repute>=140)
    {
        return true;
    }
    return false;
}
forEach
对数组里的元素逐个进行操作，实际改变了数组(不同于map)

public function Sample1008()
{
    //在每个玩家名字前面加上公会名称
    var player1:Object = {name:"wayne",level:70,repute:100};
    var player2:Object = {name:"tom",level:70,repute:190};
    var player3:Object = {name:"jacky",level:70,repute:50};
    var player4:Object = {name:"andy",level:70,repute:230};
    var player5:Object = {name:"bill",level:70,repute:120};

    var playerList:Array = [player1,player2,player3,player4,player5];

    playerList.forEach(BuildName);

    for(var i:int=0; i<playerList.length; i++)
    {
        for(var attr:String in playerList[i])
        {
            trace(attr+":"+playerList[i][attr]);
        }
    }
}

private function BuildName(item:*,index:int,arr:Array):void
{
item.name = "暗界--"+item.name;
}

//假设二维数组为 [5][7]
var xn:Number = 5;
var yn:Number = 7;
//定义一数值变量
var temp:Number = 0;

//定义我们的二维数组
var myArray:Array = new Array();

//填充二维数组
for(var i=0;i<xn;i++){
myArray[i] = new Array();
for(var j=0;j<yn;j++){
myArray[i][j] = temp++;
};
};

//将二维数组的值在输出面边输出
for(var i=0;i<xn;i++){
for(var j=0;j<yn;j++){
var st:String = "myArray[" + i + "][" + j +"]: " + myArray[i][j];
trace(st);
};
};

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