【单选题】有如下代码: var arr1:Array = [1,2,3,4,5]; arr1.unshift(0); var arr2:Array = arr1; trace(arr2); 则输出的结果是( )
【单选题】有如下代码: var arr1:Array=[1,2,3,4,5]; var arr2:Array=arr1.slice(1,2); trace(arr2); 则输出的结果是( )
【单选题】有如下代码: var arr1:Array=new Array(2); arr1.push("abcd"); trace(arr1.length); 则输出的结果是( )