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Recent questions
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c++ - Left Shifting a number
i performed a simple bit operation using << on the variable result to set bit on the 32nd position.. result = result | (1 ... result << std:: endl; } please help me find the error...
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javascript - jQuery changes classes but css does not change
I am new at learning how to change classes with JQuery. In my example, the hexagons change classes in the DOM, but no CSS is ... 77817,88.057164 Z" class="unclicked"/> </g> </svg>...
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Java better way to delete file if exists
We need to call file.exists() before file.delete() before we can delete a file E.g. File file = ...; if (file. ... that we not need to copy our utils file in every other project....
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statistics - How do I select specific coeficients in R when I am trying to find out a perfect fit in R
I am lookig for an opinion. I am new to R and for work I am trying to create a tarif pricing structure using the following: ... -0.16247 0.04202 -3.867 0.00011 *** Thank you!...
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为什么express捕获不到错误呢?
使用了http-assert包; 然后在接口中用assert()来弹出错误: 最后使用express的错误处理中间件来统一处理错误: 可是真正遇到错误的时候,好像中间件并不能捕获到,控制台报了如下的错误: 救救孩子吧??...
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php - Using traits with livewire
I'm building livewire components that shares 50% of public properties and almost 90% of submit function logic. each component using ... } so my question is: am I doing it right?...
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Jan 27, 2021
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postgresql 重新设置自增id。 大多数时候没有立即生效
由于分库,需要配置某一个数据包起始位置 比如a数据库起始1开始,比数据库起始1000开始 create table if not exists "public"."IdCards" ( "id" bigserial constraint IdCards_pk ... ,1, false) 没有立即生效... 但是我看别人电脑都是好好的.... wuwuwu...
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vue查询全表数据,现在只能查一页,我该怎么改成查全部呢?
这是现在table表格的在计算属性的实现方法 dataSource是放接口返回的table表数据,然后再经计算属性在我搜table数据时,实时改变table表的数据,但是现 ... ) this.dataSource = data.content; this.tablePage.totalResult = data.totalElements; }) },...
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How to create arrival rate for each lane in SUMO traffic simulation?
Provided that I have 3 lanes in 3 legged intersection. Meaning I have 9 lanes in total, I would like to have all 9 ... arrival, I am wondering if there is another method to do it?...
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uniapp 运行微信小程序 字体图标错误。
正常运行H5页面是这样的 运行微信小程序是这样的 报错信息 请问下这种情况怎么处理?...
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css 选择器选择指定最后一个 class?
请问怎么选择 图中最后一个 active 类?...
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Jan 27, 2021
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How to reset Bullet-at-a-time behavior in google slides
I have a presentation that I have been told to use. When in presentation mode, each page builds one bullets at a time. ... change this behavior in some global or "all at once" way?...
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elasticsearch - How to use wildcard in elastalert rules
I need help in ELASTALERT I have a log message like this : log.info("Server is started at "+LocalDateTime.now()); and I ... like its not working. Can anyone tell me how to do it?...
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后端如何管理文件?
要做一个用户上传文件的库 需求是一个“文件对象”对应一个文件(file),文件名,上传时间,上传用户以及内部的文件路径和名字 数量可能会很大 该如何管理这些文件?...
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Jan 27, 2021
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vue读取xlsx的中关于for循环函数的问题?
我的代码如下: deleteAttribute (data, callback) { var newObj = {} for (let i = 0; i < this.reservedFields.length; i++) { if (Object.prototype. ... 多边,求教以下,有什么办法可以解决问题(排除将数组再次去重的方法)...
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vue怎么将富文本里面的图片拼接上域名呢?
怎么将富文本里面的图片拼接上域名,正则不太会使用...
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Jan 27, 2021
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curl_easy_init 每次http访问都需要新创建吗?
curl_easy_init在每次HTTP访问时都需要新创建吗? 使用同一个curl可以吗? 在使用同一个curl*时出现crash,逻辑如下: init: _curl = ... in curl_multi_perform () 5 0x00000000004791c1 in curl_easy_perform () 请问有什么问题?...
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curl_easy_init
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2.2k
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nestjs如何在post接口中转换Boolean类型参数?
1.post表单提交格式是x-www-form-urlencoded,参数到了服务端都转成了字符串格式 在dto中使用@Type(() => Boolean),boolean类型传过来true或false都被当成了字符串处理 ... 像只能在dto中使用class-transformer手写@Type 和@Transform来实现 有没有简单方便一点的方案?...
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Jan 27, 2021
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common table expression - Cleaner SQL CTE than the current one
Currently I use the following CTE to grab a category and any category below it: WITH RECURSIVE tree AS ( SELECT * FROM ... that I read his other version. How to simplify this CTE?...
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common
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jsp - How to get the location of the uploaded image in java?
I am working on a java project that I need in a part of it to allow the user to upload an image from his PC (from a ... path =""; // get the path of the uploaded image } %>...
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Jan 27, 2021
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layer配合vue为什么弹窗回调里面拿不到data的值
subContactUs: function getHomeData() { $.ajax({ type: "get", data: { content: this.contactFrom.content,//这边没问题,可以拿到 name: this. ... 这是为什么 layer.closeAll(); } }); } } }); }...
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infosphere spl - "HSTS missing from HTTPS servers" reported on Streams servers. What is its impact on client's data?
Recently my project's security OPs reported a vulnerability "HSTS missing from HTTPS server" on streams servers. The application is on cloud....
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Jan 25, 2021
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infosphere
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flutter键盘文案自定义
textInputAction 文案自定义...
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Jan 25, 2021
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arrays - Catch items from list which contain specifc string c#
lets assume I got a listbox which keeps updating and contains for example: Apple Juice -- 18 EURO Orange Juice -- 14 EURO Juice Berry ... result = list.Find(x => x.Id == "Apple");...
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Jan 24, 2021
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树结构添加搜索框以快速定位到与查询条件相匹配的叶子节点或子分支。
树结构添加搜索框以快速定位到与查询条件相匹配的叶子节点或子分支。...
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Jan 24, 2021
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用Print.js调打印机,但是打印机页面与打印页面不一致。求怎么解决样式问题
我的页面是上面两张图片但是打印机页面是这样的 我用的是Print.js调起的打印机 轮播用的vue-awesome-swiper插件。 求怎么实现打印机的页面与要打印的页面一致。...
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Jan 24, 2021
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reactjs - Deployment problems with React-Express App
I'm trying to deploy a MERN app (built with create react app) to Heroku, but whenever I try to access the URL, it returns with ... result) }) .catch(err => { console.log(err) }) })...
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Jan 24, 2021
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reactjs - HTML: Default option for required select tag
Is there a way to not count the default option as a submission in a required select tag? For example if the default ... to choose one of the other options before they can submit....
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Jan 24, 2021
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