查找以数组 AS3 开头的字符串

Question

我想阻止用户使用网络摄像头模拟器，我在 AS2 中通过使用 senocular 的功能做到了这一点，但我无法使其在 AS3 中工作，所以，这里是 old version by senocular ，我想在 AS3 中做同样的事情，尝试使用 indexOf 但不起作用，我需要找到字符串的至少前 4 个字符并进行比较将它们添加到 AS3 中的数组内的项目中！

String.prototype.startsWith = function(str){
        return !this.indexOf(str);
    }

这是我想做的：

var bannedDevices = new Array("FakeCam","SplitCam","Phillips Capture Card 7xx","VLC");

var myDeviceName = "SplitCam v1.5";  //"Splitcam" in bannedDevices should trigger this;

if (myDeviceName.indexOf(bannedDevices)){
   trace("banned device");
}

感谢您的帮助！

Answer 1

好的，我将之前的答案留给历史。现在我已经明白你想要什么了：

public function FlashTest() {
    var bannedDevices:Array = new Array("FakeCam","SplitCam","Phillips Capture Card 7xx","VLC");

    var myDeviceName:String = "SplitCam v1.5";  //"Splitcam" in bannedDevices should trigger this;

    trace(startsWith(myDeviceName, bannedDevices, 4));
}

/**
* @returns An array of strings in pHayStack beginning with pLength first characters of pNeedle
*/
private function startsWith(pNeedle:String, pHayStack:Array, pLength:uint):Array
{
    var result:Array = [];
    for each (var hay:String in pHayStack)
    {
        if (hay.match("^"+pNeedle.substr(0,pLength)))
        {
            result.push(hay);
        }
    }
    return result;
}

Answer 2

您的需求不是很清楚...这是一个函数，它从以给定字符串开头的数组中返回每个字符串。

public function FlashTest() {
    var hayStack:Array = ["not this one", "still not this one", "ok this one is good", "a trap ok", "okgood too"];

    trace(startsWith("ok", hayStack));
}

/**
* @returns An array of strings in pHayStack beginning with the given string
*/
private function startsWith(pNeedle:String, pHayStack:Array):Array
{
    var result:Array = [];
    for each (var hay:String in pHayStack)
    {
        if (hay.match("^"+pNeedle))
        {
            result.push(hay);
        }
    }
    return result;
}