在Array的方法(filter,every,some,forEach,map)中,使用 thisObject

var testVal:String = "something";
array.filter(someCallbackFunction, testVal);
[...]
public function someCallbackFunction(element:*, index:int, arr:Array):Boolean
{
        element.isActive = this;
}

public function testArray()
{
    var arr:Array = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
    var filterValArr:Array = [4, 8];

    var filtARr:Array;
    var val:int = filterValArr.length;
    for (var i:int = 0; i < val; i++)
    {
        filtARr = arr.filter(
            function(item:*, index:int, array:Array):Boolean
            {
                return item > this;
            },
            filterValArr[i]
        );
        trace("filtARr test " + i + " = " + filtARr);
    }
}