AS3数组学习

心已赠人 2022-07-17 20:59 125阅读 0赞

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);  
\};  
\};