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mongodb - lookup with condition in mongoose

I have two collections. articles and bookmarks. articles { _id: "5faa889ade5e0a6326a873d3", name: "article 1" }, { _id: " ... user_id": objectId(req.user._id) } // logged user id...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Electron windows平台应用如何设置开机自启动？

在开发Electron程序时，客户需要程序开机自启动。如何处理？...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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postgresql中的sql问题

SELECT districtid, char_length(districtid) as d_length FROM district where ST_Intersects(geometry, ST_GeometryFromText('LINESTRING (119.922 30.526, ... ) from dis); 有没有其他更好的方法？...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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js 面向对象问题：为什么用不用new都一样呢？

s= { "a":111 } ss = { "sss" : { "set":function(num){ this.a=num return this }, "a":222 } } Object.setPrototypeOf(ss.sss, s); alert( ... 有哪个更省内存，因为new包括了return 对象就真么简单，感谢问题下面的评论者的链接...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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PHPPDO如果连接MySQL失败，如何返回一些信息？

PHPPDO如果连接MySQL失败，如何返回一些信息？当连接失败(数据库出问题时)，PDO的new PDO连接将输出一个“Sorry MySQL”或者向浏览器输出一个警告弹窗想要这样怎么写？新手问题，感谢各位老师解答...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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383 views

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网页qq的消息提醒怎么实现的？

如何实现网页qq的跨页面的消息提醒？...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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.htaccess 某个域名只允许访问某个目录, 否则重定向的另一个域名.

如题... 假如项目目录是这样的. /index.php /images/2017/1234.png /admin.php /index.html 假如我想让 a.com 能正常访问任意一个文件, 而 b.com 只能访问 http ... ://b.com/admin.php 会重定向到 http://a.com 这个在 .htaccess 要怎么实现 ?...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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projekktor切换flash播放

tmpPlayer = projekktor('#videoPlayer', { poster: address, playerFlashMP4:'StrobeMediaPlayback.swf', title: 'projekktor', width: 600, height: 420 ... 器上还是不能自动启用flash播放是不是哪我配错了？？？？？...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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598 views

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如何通过try catch 监测浏览器是否实现某个功能，如果实现将其调用否则进行提示。哪位大神教教小弟呀！

类似于QQ之类的应用的。...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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change field name of an index in elasticsearch

I want to ask that, how to change field names in elasticsearch index. I mean, "_source": { "name_of_field": "lorem" } change "name_of_field" to "new_name"...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - JWT token throwing 401 unauthorized Spring boot

I am using JWT token for my project which uses java 11 and speing boot. When I am using JWT Token and when i try ... ("/h2-console/**").permitAll() .anyRequest().authenticated();...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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node.js - Deploy Azure Function with an Alpine - Unhandled 'error' event

I want to deploy Azure function (node and/or python) from the lightest DockerFile. So I need to be able to run ... -y azure-functions-core-tools && apt-get install azure-cli...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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js拼接html有没有比较快的方法？

<div class="formcode clearfix"> <div class="title">新建用户<div class="xicon">x</div></div> <div class="formbox"> <form action=""> <p>< ... /form> </div> </div> 拼接这样一段html 有没有技巧或者简化方法...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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395 views

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react props的问题

子组件的searchKey 是通过props传递过来的。当父组件传递的props.searchKey改变的时候怎么重新render子组件呢...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Get a certain string from the first elements - array

Given an array: arr = ['Get your face right in there.', 'You’re like, wait, though, isn’t that too ... word) is not possible. For this purpose, I need to generalize....

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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请教关于vue路由搭建问题

我有这样一个需求，首页是一些图片，每个图片点进去是详情页，问题出在这里了思路1，每张图片是一个动态路由/product/:id,作为详情页，这样有一个弊端，就是，路由切换进详情，那么返回后用户的浏览位置肯定丢失了（路由重新渲染） ... 调用Detail组件的方法来覆盖一个遮罩层，从而显示详情页数据，但是这样做好像不怎呢自然呢？想知道有没有更好的方式？...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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719 views

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for 循环中创建图片并监听 onload 事件失败

问题：通过循环创建图片，并在每个图片加载完成之后执行函数，不过每次都是触发最后一个图片的 onload 事件代码： var src=[ "http://www.w3school.com.cn/i/site_photoref.jpg", "http: ... .jpg"> 我的需求是获得每个图片加载完成之后执行相应的函数，有没有什么好的解决办法？...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Vue.complile生成对象中staticRenderFns数组是用来做什么的呢

最近用到这个Vue.compile命令在控制台打印的时候看到的 result包含一个render函数，一个staticRenderFns数组这个数组是做什么的呢 <div id="app"> </ ... temp); this.template = result.render; console.log(result); } }) </script>...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.7k views

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js 如何禁止浏览器的拖动搜索

现在页面上有一个拖拽功能, 但是目前绝大部分浏览器都会有一个拖动然后新增一个tab的搜索页, 请问, 不用浏览器的设置, 能否实现禁止浏览器这个行为 ?...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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342 views

1 answer

file - C++ Client socket receives only first letter of message

I have been stuck on a problem for the past few days. I need to design a music streaming app in C++. However, I find it ... else { cout << "No songs found in directory" << endl; }...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Regarding custom view in drupal 7

I have one issue that I'm facing now, I have 2 roles : Admin and another one is creator. Now I have created 1 view ... what should i do how do i apply condition on for the user.....

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

1 answer

react native - I18nManager.forceRtl(false) does not work in android

I want to disable forced-rtl in android device having (rtl-device-language) by calling: await I18nManager.forceRTL(false); RNRestart. ... ... any help ... anything ... is welcome...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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forms - Static Website, File Upload and recaptcha

I am just thinking what the best approach is to implement a simple form with file upload on a static website without ... Sends "Message" in our companies slack channel / or email....

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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什么情况下，HTTP并行连接（相对串行连接）反而让页面加载更慢？

一般来说，并行连接比起串行连接，使页面加载更快。有没有一些特殊情况，不适合使用并行连接？...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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301 views

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let在循环中的使用

for (let i = 0; i < 3; i++) { // let i = 'abc'; console.log(i); } 像上面的循环，会输出0 1 2 let是明确的不允许重复声明的去掉注释后是下面这样，会输出 ... for (let i = 0; i < 3; i++) { let i = 'abc'; console.log(i); }...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer

mock.js的一个问题？

我这段代码为什么输出结果是从6开始的？？ Mock.mock('/test', {/*地址任意*/ 'result|5': [{ 'id|+1': 1, 'email': '@email', 'name':'@first' }] ... [i].email+'</span></li>'; } $(".demo").html(content); } } });...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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typescript - Fire form valid event with initial async data from parent - Angular Reactive forms

In my project, from the parent component, I am passing some async data to the child component. In the child component, ... I can fire the form valid event? Thank You..! Stackblitz...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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wicked pdf - Extending view to generate PDF returns error after upgrade to Rails 6.1

Until recently I extended the Rails view to generate a PDF in a service object: view = ActionView::Base.new( ... So any idea what value to provide as 3rd parameter?...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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