properties | 易学教程

Javascript add properties with the same name to an object

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问题 var elements = document.getElementsByClassName("someClass"); var obj = {}; for (var i = 0; i < elements.length; i++){ obj.userId = elements[i].id } // output: obj = {userId: 1, userId: 2, userId: 3.....etc} Is it possible in some way? Thanks. 回答1: keys in Object must be unique, you can try use Array , like this var obj = []; var data = {}; for (var i = 0; i < elements.length; i++) { data = { userId: elements[i].id }; obj.push(data); } // [ {userId: 1}, {userId: 2} ... ] 回答2: The JSON RFC says

How do i change property value in vb.net

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问题 i would like to assign my array vals to properties of my object. like: For i = 1 To 32 myClass.Prop_i = val[i] Next 回答1: VB.NET isn't a dynamic language: you can't do such things. Since VB.NET doesn't have a "dynamic" keyword like C#, your option is reflection: myClass.GetType().GetProperty("Prop_" + i.ToString()).SetValue(myClass, val[i], null); But if you're more explicit with your problem maybe there's a more elegant solution than reflection ;) 回答2: Your property needs to define Set . This

css3 3d变换和动画——回顾

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1.transform-style 属性指定嵌套原始是怎样在三维空间中呈现。　　语法：transform-style: flat | preserve-3d 　　　　　　flat 表示所有子元素在2D平面呈现。　　　　　　preserve-3d 表示所在元素在3D空间中呈现。 2.perspective 定义3D元素距视图的距离，以像素计，当为元素定义perspective 属性时，其子元素获得透视效果，而不是元素本身　　语法：perspective: number | none; 　　　　　　number 元素距离视图的距离，以像素计。　　　　　　none 默认值，与0 相同，不设置透明。 3.perspective-origin 属性定义3D元素所基于的X轴和Y轴，该属性允许您改变3D 元素的底部位置，定义的这个属性，它是一个元素的子元素，透视图，而不是元素本身。　　语法：perspective-origin: x-axis y-axis 　　　　x-axis 定义该视图在x轴上的位置。　　　　y-axis 定义该视图在y轴上的位置。示例：　　<style> 　　　　.box{width:60px;height:60px;padding:40px;border:2px solid #000;margin:30px auto; -webkit-transform

access the control inside the synchronous block in xcode 5.0 iPhone

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问题 I am new to blocks programming.I am trying to download an image and display it on an image view whose property i have already made in my .h file.as far as i know the class property can only be accessed in the form of getter/setter inside the block.So i have created an imageView "imgVw" in viewDidload method and am currently unable to access it inside the block using self. Please find below my code. /*dispatch the queue asynchronously for non ui related tasks image downloading*/ void(

access the control inside the synchronous block in xcode 5.0 iPhone

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Spring ResourceBundleMessageSource Encoding for Czech MessageResource.getMessage()

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问题 I have a converter which reader the properties from .properties file using ResourceBundleMessageSource for multiple locales e.g en_US,fr_FR,cs_CZ Below is the xml to read properties. <bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource"> <property name="basenames"> <list> <value>lang/beneficiaryproperty/beneficiary</value> <value>lang/labelsbundlesproperty/labelsbundle</value> </list> </property> </bean> And below is the code to read and write the

自定义MediaType的转换器

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由于是Rest风格，使用的是 RequestResponseBodyMethodProcessor ，我们模仿jackson的convert进行仿写 @PostMapping ( value = "/properties" , consumes = "text/properties;charset=utf-8" ) public Properties properties ( @RequestBody Properties properties ) { return properties ; } public class PropertiesConvert extends AbstractGenericHttpMessageConverter < Properties > { /** * 支持的处理类型 */ public PropertiesConvert ( ) { super ( new MediaType ( "text" , "properties" ) ) ; } /** * 返回值处理 */ @Override protected void writeInternal ( Properties properties , Type type , HttpOutputMessage outputMessage ) throws IOException ,

How to diff Property Values of two objects using GetType GetValue?

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问题 I have the following classes: public class Person { public String FirstName { set; get; } public String LastName { set; get; } public Role Role { set; get; } } public class Role { public String Description { set; get; } public Double Salary { set; get; } public Boolean HasBonus { set; get; } } I want to be able to automatically extract the property value diferences between Person1 and Person2, example as below: public static List<String> DiffObjectsProperties(T a, T b) { List<String>

Java-----Class.forName()在代码上无法执行报错NotFound解决方法

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Java–Class.forName() 异常信息:ClassNotFoundException 前因：在写JDBCUtils工具类的时候，发现测试时无法获取到正常的数据，查看日志后发现报错ClassNotFoundException。错误原因: jar包导入正常所有配置文件的配置信息正常 SQL语句以及其他代码编写正常文件夹命名异常在web目录下的创建的目录名称必须创建为WEB-INF，但是我创建的是WEB-INFO，随后创建的lib目录，放进了jar包，因此出现了该错误。然而在最初的学习中也是创建的WEB-INFO目录，却可以运行正常，目前原因未知。代码实现配置文件 driverClassName=com.mysql.jdbc.Driver url=jdbc:mysql://localhost:3306/userlogin username=root password=guoyuhang initialSize=5 maxActive=10 maxWait=3000 JDBC代码实现 package cn.itcast.util; import java.io.FileReader; import java.io.IOException; import java.net.URL; import java.sql.*; import java.util

Property visibility in abstract class

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问题 Does someone knows C# best practice about the way to define attribute visibility (private or protected) behind public property in abstract class or parent class. In other worlds what is the best practice by default (and why) between: public abstract class MyClass { private string myAttribute; public string MyAttribute { get { return myAttribute; } set { myAttribute = value; } } } and public abstract class MyClass { protected string myAttribute; public string MyAttribute { get { return