#col

Specify Computed Columns in a Table

https://docs.microsoft.com/en-us/sql/relational-databases/tables/specify-computed-columns-in-a-table?view=sql-server-2017LimitationsandRestrictionsAcomputedcolu...

The control collection cannot be modified during DataBind, Init, Load, PreRender or Unload phases.

https://stackoverflow.com/questions/5508666/dynamically-add-html-to-asp-net-page  https://stackoverflow.com/questions/4975823/adding-to-page-control-c...

HearthBuddy炉石兄弟 Method 'CollectionDeckBoxVisual.IsValid' not found.

 [CollectionManagerScene_COLLECTION]AnexceptionoccurredwhencallingCacheCustomDecks:System.MissingMethodException:Method'CollectionDeckBoxVisual.string_4=Is...

报错:org.apache.jasper.JasperException: /jsp/head.jsp (line: 1, column: 2) Page directive: illegal to

上面报错提示的是org.apache.jasper.JasperException:/jsp/head.jsp(line:1,column:2)Pagedirective:illegaltohavemultipleoccurrencesofcontentTypewithdifferentvalues(old:text/...

Collection接口与Iterator接口

Collection接口的实现类跟Vector相似。要从实现了Collection接口的类的实例中取出保存在其中的元素对象,必须通过Collection接口的Iterator()方法,返回一个Iterator接口。Iterator接口与Enumeration接口非常相似。该接口的优点是其中的方法名比较简短。Arrayl...
代码星球 ·2021-02-08

Collection接口都是通过Iterator()(即迭代器)来对Set和List遍历

以下介绍接口:List接口:(介绍其下的两个实现类:ArrayList和LinkedList)ArrayList和数组非常类似,其底层①也用数组组织数据,ArrayList是动态可变数组。① 底层:指存储格式。说明ArrayList对象都是存在于数组中。注:数组和集合都是从下标0开始。ArrayList有一个...

POSTGRESQL中ERROR: recursive query "t" column 2 has type character varying(150) in non-recursive term but type character varying overall

最近在做项目的时候有个需求是需要查到当前登录的用户下辖所有区域的数据,并将查询出来的部门信息以如下格式展示最高人民法院>江苏省高级人民法院>南通市中级人民法院最高人民法院>江苏省高级人民法院>连云港市中级人民法院,于是用如下语句查询 WITHRECURSIVETAS(SELECTc_i...

[wordpress]后台自定义菜单字段和使用wordpress color picker

Wordpress Version4.4.2参考链接插件使用wordpresscolorpicker:AddANewColorPickerToWordPress后台菜单自定义字段参考插件:wp-menu-item-custom-fieldsHowdoIimplementtheWordpressIrispick...

html的rowspan和colspan

https://www.jb51.net/article/165695.htmrowspan工具https://blog.csdn.net/oxiaobaio/article/details/80974629 https://github.com/huozhanyi/RowspanTool js实现...
代码星球 ·2021-02-03

Uiautomator--出现报错“urllib3.exceptions.ProtocolError:<'Connection aborted.',error<10054,''>>”的解决方式!

在运行uiautomator时,出现报错“urllib3.exceptions.ProtocolError:<'Connectionaborted.',error<10054,''>>”根据错误提示,可以看出是“socket断开了,连接中断”,因此需要将sleep等待时间延长,即可解决问题代码如...

获取mongo 数据大小及collection大小

1.数据库大小>useengineswitchedtodbengine>db.stats(){"db":"engine","collections":10,"views":0,"objects":51007,"avgObjSize":46341.04220989276,"dataSize":23637175...

mongoose删除mongodb某个库的所有collection

上次实现过获取某个库下的所有collection,但是时间久了又忘记了,因此记录下来获取所有collection名字varmongoose=require('mongoose');varlink='mongodb://username:password@XXXX:27017/test';mongoose.connect...

mysql 8.0下的SELECT list is not in GROUP BY clause and contains nonaggregated column

mysql的版本mysql>selectversion();+-----------+|version()|+-----------+|8.0.12|+-----------+在执行group by时遇到报错,具体如下mysql>select*fromapi_propertiesGROUPBYfi...
代码星球 ·2021-02-01

mysql问题解决SELECT list is not in GROUP BY clause and contains nonaggregated column

今天在Ubuntu下的部署项目,发现一些好好的列表页面发生1055:Expression#11ofSELECTlistisnotinGROUPBYclauseandcontainsnonaggregatedcolumn'ppm_c.ppm_flow_starting_dealing.status'whichisnotf...

用 Collections.reverse 反转一个 List

importjava.util.Collections; List<String>list=newArrayList<String>();list.add("11");list.add("12");list.add("13"); //反转list Collectio...
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