首页 \ 问答 \ 比较params对象数组(Compare params array of objects)

比较params对象数组(Compare params array of objects)

我正在研究一种比较对象集合的方法(因为对象支持所有类型),如果它们完全相同,它将返回true,但是如果一个或多个不同,它将返回false。

这是我拥有的:

    public static bool Compare(bool compareTypes = false, params object[] values)
    {
        if (!compareTypes)
        {
            if (values is null || values.Length == 0) return false;
            else if (values.Length == 1) return true;
            else return values[0] == values[1];
        }
        else
        {
            if (values is null || values.Length == 0) return false;
            else if (values.Length == 1) return true;
            else return values[0].GetType() == values[1].GetType();
        }
    }

只要对象的数量是2,它就可以正常工作。

我的问题是,我希望方法比较所有参数的值或类型,而不管数量

这就是我想要的方法

Compare (false, "Hello", "Hello") //True
Compare(false, "Hello", "Bye") //False
Compare(true, 0, 1) //True
Compare(true, "Hi", 20) //False
Compare(false, "LOL", "LOL", "LOL", "LOL") //True
Compare(false, "LOL", "LOL", "LOL", "lol") //False

I'm working on a method that compares a collection of objects (since the object supports all types), if they are all the same, it returns true, but if one or more differs, it returns false.

This is what I have:

    public static bool Compare(bool compareTypes = false, params object[] values)
    {
        if (!compareTypes)
        {
            if (values is null || values.Length == 0) return false;
            else if (values.Length == 1) return true;
            else return values[0] == values[1];
        }
        else
        {
            if (values is null || values.Length == 0) return false;
            else if (values.Length == 1) return true;
            else return values[0].GetType() == values[1].GetType();
        }
    }

And it works fine as long as the number of objects is 2.

My problem is that I want the method to compare the value or the type of all parameters that are passed regardless of the amount

This is what I want my method to do

Compare (false, "Hello", "Hello") //True
Compare(false, "Hello", "Bye") //False
Compare(true, 0, 1) //True
Compare(true, "Hi", 20) //False
Compare(false, "LOL", "LOL", "LOL", "LOL") //True
Compare(false, "LOL", "LOL", "LOL", "lol") //False

原文:https://stackoverflow.com/questions/49714956
更新时间:2021-08-30 20:08

最满意答案

它基本上是一个允许可更新视图的构造。 对于多表方案,INSERT只能是其中一个基础表。 View和要插入的表之间必须存在One-One关系。

您显示的查询是一个扩展相同概念的内联视图。

请阅读此处以获取更多文档

http://docs.oracle.com/cd/E17952_01/refman-5.1-en/view-updatability.html

现实生活 - 能够通过View实现这一目标,提供灵活性和轻松性。 但欢迎更多有价值的投入。


It is basically a construct allowing for updateable Views. For a multi table scenario a INSERT can only be to one of the underlying tables. There has to be a One-One relationship between the View and the table being inserted into.

The query you have shown is a inline view extending the same concept.

Read here for more documentation

http://docs.oracle.com/cd/E17952_01/refman-5.1-en/view-updatability.html

Real life - is so as to be able to do this via View gives flexibility, ease. But more valuable inputs are welcome.

相关问答

更多

相关文章

更多

最新问答

更多
  • 获取MVC 4使用的DisplayMode后缀(Get the DisplayMode Suffix being used by MVC 4)
  • 如何通过引用返回对象?(How is returning an object by reference possible?)
  • 矩阵如何存储在内存中?(How are matrices stored in memory?)
  • 每个请求的Java新会话?(Java New Session For Each Request?)
  • css:浮动div中重叠的标题h1(css: overlapping headlines h1 in floated divs)
  • 无论图像如何,Caffe预测同一类(Caffe predicts same class regardless of image)
  • xcode语法颜色编码解释?(xcode syntax color coding explained?)
  • 在Access 2010 Runtime中使用Office 2000校对工具(Use Office 2000 proofing tools in Access 2010 Runtime)
  • 从单独的Web主机将图像传输到服务器上(Getting images onto server from separate web host)
  • 从旧版本复制文件并保留它们(旧/新版本)(Copy a file from old revision and keep both of them (old / new revision))
  • 西安哪有PLC可控制编程的培训
  • 在Entity Framework中选择基类(Select base class in Entity Framework)
  • 在Android中出现错误“数据集和渲染器应该不为null,并且应该具有相同数量的系列”(Error “Dataset and renderer should be not null and should have the same number of series” in Android)
  • 电脑二级VF有什么用
  • Datamapper Ruby如何添加Hook方法(Datamapper Ruby How to add Hook Method)
  • 金华英语角.
  • 手机软件如何制作
  • 用于Android webview中图像保存的上下文菜单(Context Menu for Image Saving in an Android webview)
  • 注意:未定义的偏移量:PHP(Notice: Undefined offset: PHP)
  • 如何读R中的大数据集[复制](How to read large dataset in R [duplicate])
  • Unity 5 Heighmap与地形宽度/地形长度的分辨率关系?(Unity 5 Heighmap Resolution relationship to terrain width / terrain length?)
  • 如何通知PipedOutputStream线程写入最后一个字节的PipedInputStream线程?(How to notify PipedInputStream thread that PipedOutputStream thread has written last byte?)
  • python的访问器方法有哪些
  • DeviceNetworkInformation:哪个是哪个?(DeviceNetworkInformation: Which is which?)
  • 在Ruby中对组合进行排序(Sorting a combination in Ruby)
  • 网站开发的流程?
  • 使用Zend Framework 2中的JOIN sql检索数据(Retrieve data using JOIN sql in Zend Framework 2)
  • 条带格式类型格式模式编号无法正常工作(Stripes format type format pattern number not working properly)
  • 透明度错误IE11(Transparency bug IE11)
  • linux的基本操作命令。。。