option

Oracle数据库将权限分为两大类：系统权限和对象权限。系统权限是在系统级对数据库进行存取和使用的机制。对象权限是指某一用户对其他用户的表、视图、序列、存储过程、函数、包等的操作权限。 授予系统权限 GRANT命令的语法如下： GRANT system_privilege |role To user |role |PUBLIC [WITH ADMIN OPTION] 其中： system_privilege：表示Oracle系统权限，系统权限是一组约定的保留字，如果能够创建表结构，则为CREATE TABLE; role:角色 user:具体保留字，或者是一系列的用户。 PUBLIC:保留字，代表Oracle系统的所有所用户； WITH ADMIN OPTION:表示被授权者可以将权限授予另外的用户。 示例： 授予连接和开发系统权限 grant connect,resource to wang 系统权限收回 REVOKE命令的语法 REVOKE system_privilege|role from user|role|public REVOKE object_privilege|all on schema.object from user|role|public CASCADE CONSTRAINTS 其中 system_privilege:系统权限或角色； object

在做CMS后台的时候要实现一个功能，用户在下拉选择不同商品的时候，在下拉框旁附上一个商品图片，当用户选择不同的商品的时候，图片中显示后台传入option的url（自定义属性），并通过option的from（自定义属性【1：本地图片url，2：网络图片url】）来判断，最后拼接好字符串，利用JQuery的$('#img的id').attr('src', 新url);来改变图片src地址。 由此可见选择不同的下拉则会改变旁边图片内容。 下面贴代码： <select name="product_id" onchange="setAct(this)" id="product"> <option value="">请选择商品</option> {volist name="all_productNames" id="vo"} <option value="{$vo.id}" url="{$vo.main_img_url}" from="{$vo.from}"> {$vo.name} </option> {/volist} </select> <img id="product_img" src="" height="50px" /> 这里说明：因为用了TP5的模板语法所以会利用volist循环数据，讲select选择框的id设置为product，同时加入一个方法setAct(this)

alarmManage(){ let drawLine = echarts.init(document.getElementById('data-alarmManage-table-wrap')); let option = null; option = { tooltip: { trigger: 'item', formatter: "{a} <br/>{b}: {c} ({d}%)" }, legend: { orient: 'vertical', x: 'left', y: '24%', x: '40%', itemHeight: 14, itemWidth: 14, textStyle: { color: '#BBF6FF', fontSize: 14 }, itemGap: 20, data:['直接访问','邮件营销','联盟广告','','视频广告','搜索引擎','产品运营','','风控评估','算法投入'] }, color:["pink",'red','green','yellow','gray','purple','blue','wheat'], icon: "rect", series: [ { center: ['25%','50%'], name:'访问来源', type:'pie', radius: ['50%', '70%'],

I have this Java class in a Jar file included as a dependency of an Scala program (like the Axis jar): class MyClass { private String[] someStrings; public String[] getSomeStrings() { return someStrings; } } In my Scala program I have a Java API that return an instance of MyClass instance of MyClass to my program in Scala: val myInstance = JavaAPI.getInstanceOfMyClass() Then I try to use the someStrings array in my Scala program but it's null (let say that it wasn't properly initialized) for(str <- myInstance.getSomeStrings()) ... So this throws a NullPointerException . I've found that in

Please help I have no idea how what a string option does. is it possible to convert string option to a string? As already pointed out you could use pattern matching to get the desired result. So, something like this: fun foo(NONE) = "" | foo(SOME a) = a; But you could spare the trouble and use Option.valOf function from SML library instead by just doing: Option.valOf(SOME "my string"); (Or just valOf(SOME "my string"); as newacct pointed out in the comments.) The "option" type in ML is like, say, Nullable in the .NET world. It is a discriminated union with two values, None and Some of 'a (for

I'm working on the address page for a shopping cart. There are 2 <select> boxes, one for Country, one for Region. There are 6 standard countries available, or else the user has to select "Other Country". The <option> elements all have a numeric value - Other Country is 241. What I need to do is hide the Region <select> if the user selects Other Country, and also display a textarea. Any help MUCH appreciated! You need to bind a function to the select list so that when it changes, your function decides if the div should be shown. Something like this ( untested, hopefully syntactically close ).