查询数组中第一个大于给定数的元素的索引号

var arr:Array=[1,33,5,7,8,12,4];trace(getIndex(9,arr));function getIndex(currentValue:Number,arr:Array):int {var flag:Boolean=true;var firstMatchIndex:int;var num:int=arr.length;for (var i:int=0; i<num; i++) {if (currentValue<arr[i]) {if (flag) {flag=false;firstMatchIndex=i;}}}if (currentValue>arr[num-1]) {firstMatchIndex=num-1;}return firstMatchIndex;}