Flex4.6 ArrayCollection求最大值,最小值,排序
? ? ? ? ? ? ? ? ? ? ? ??Flex 4.6 ? ?ArrayCollection求最大值,最小值,排序 ?项目需求:求出ArrayCollection的最大值,最小值,排序 ?源代码下载地址:http://download.csdn.net/detail/wuxiaokaixinguo/5290274 代码如下:
<?xml version="1.0" encoding="utf-8"?> <s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600"> <fx:Declarations> <!-- 将非可视元素(例如服务、值对象)放在此处 --> </fx:Declarations> <fx:Script> <![CDATA[ import mx.collections.ArrayCollection; import mx.collections.Sort; import mx.collections.SortField; import mx.controls.Alert; [Bindable] public var coll:ArrayCollection = new ArrayCollection([ {getInfoTime:'2013-04-23 10:00',waterHeight:6},{getInfoTime:'2013-04-23 10:02',waterHeight:2},{getInfoTime:'2013-04-23 10:04',waterHeight:3},{getInfoTime:'2013-04-23 10:06',waterHeight:1000},{getInfoTime:'2013-04-23 10:08',waterHeight:5.0},{getInfoTime:'2013-04-23 10:10',waterHeight:2000} ]); // Get a function of the maximum public function btn_getMaxValue_clickHandler():void{ var sort:Sort = new Sort(); //按照waterHeight升序排序 sort.fields=[new SortField("waterHeight")]; coll.sort = sort; coll.refresh(); Alert.show(coll[coll.length-1].waterHeight); } //Get a function of the minimum public function btn_getMinValue_clickHandler():void{ var sort:Sort = new Sort(); //按照waterHeight升序排序 sort.fields=[new SortField("waterHeight")]; coll.sort = sort; coll.refresh(); Alert.show(coll[0].waterHeight); } ]]> </fx:Script> <s:Button x="171" y="156" width="83" height="31" label="获取最大值" click="btn_getMaxValue_clickHandler();"/> <s:Button x="321" y="157" width="83" height="31" label="获取最小值" click="btn_getMinValue_clickHandler();"/> </s:Application> 备用知识: SortField的用法: 构造函数细节 SortField?()?构造函数? public?function?SortField(name:String?=?null,?caseInsensitive:Boolean?=?false,?descending:Boolean?=?false,?numeric:Object?=?null) 构造函数。? 参数??name:String?(default?=?null)?—?此字段用来进行比较的属性的名称。如果该对象为简单类型,则传递?null。?? ?caseInsensitive:Boolean?(default?=?false)?—?在对字符串进行排序时,指示比较运算符是否忽略值的大小写。?? ?descending:Boolean?(default?=?false)?—?指示比较运算符是否按降序排列项目。?? ?numeric:Object?(default?=?null)?—?指示比较运算符是否按编号而不按字母顺序比较排序项目。?? (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |