flex array search traversal

public static function findRow(key:String,value:String,fromIndex:int,sourceArray:Array):int{
var resultIndex:int = -1;
if(sourceArray != null){
(function findIndex(element:*,index:int,arr:Array):Boolean{
if(index >= fromIndex){
if(element == null){
if(value == null){
resultIndex = index;
return true;
}else{
return false;
}
}else{
if((element[key]) == (value)){
resultIndex = index;
return true;
}else{
return false;
}
}
}else{
return false;
}
});
}
return resultIndex;
}