Recent questions in Technique[技术]

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serialize()包括类型一并序列化，如果存在数字或数字字符串时如何做两个系统间的相等判断

有遇到过类似从MySQL数据库中，不需要用特定的类型转化，比如无需操作CAST和CONVERT就能得到查询的结果集全部是字符串的情况吗？ /** * 获取系统中该月结算单数据 * * ... &$value) { foreach ($value as $key => $val) { $value[$key] = strval($val); } } }...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Method from another class JAVA_with GLOOP 3d lib

Sorry for disturbing you at this time but for some reason when i want to call a method from another class (im using BlueJ btw. ... ; i++){ gartenlampeoben[i].setzeFarbe(1,1,0); } }...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - Why i can't see runtime error in Exception Page?

In asp.net core I create manually unhandled exception but i can't display runtime error in Visual Studio or Exception ... app.UseExceptionHandler("/Home/Error"); app.UseHsts(); }...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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这段代码怎么没法得到点击的目标值

(function (){ var list=document.getElementById("list-con"); list.addEventListener('click',function (ev) { var target=ev.target if ... }; target.addClass("active"); } }) })();...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.2k views

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html5 video播放视频卡死

如题，使用video标签播放摄像头的监控视频，过一阵画面就会出现很大的延迟，延迟好长时间或者直接卡住了，有没有大神知道怎么解决呀？...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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127 views

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c# - time out when switching to a specific iframe

I am having trouble switching to a specific iframe. time out occurs when trying to switch to the first iframe in the ... input")).Click(); //set macro ffDriver.SwitchTo().DefaultC...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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545 views

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公众号和小程序能访问微信用户的好友列表具体怎么做

如果关注了我的公众号了，我如何才能看到看到关注者的通讯录...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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angular - How can I test recursive http requests that have a delay?

I have a somewhat complex situation where, do to backend implementation, I need to poll the backend until ... to comments and improvements from @Andrei. Issue still persists...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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179 views

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laravel5.4的routes文件夹中的console.php和channels.php是做什么的？

laravel5.4的routes文件夹中的console.php和channels.php是做什么的？...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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298 views

1 answer

angular - URL not found appears when try to deploy with cloud build (gcp)

Application - Angular I am trying to automate the deployment process for my angular app in GCP. When I deploy manually from ... ://github.com/sass/node-sass/releases/tag/v4.12.0...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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349 views

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file - Read formatted text in Java

I'm trying to read a formatted file in Java, I used to do this pretty well in C but no clue here. The example line is: ... I used to do it with fseek, fread, etc when working in C...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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274 views

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关于SQL中一个表的转换问题

表结构如下： date,a,b,c 0101,1,2,3 0202,4,5,6 要转换成： date,col1,col2 0101,a,1 0202,a,4 0101,b,2 0202,b,5 0101,c,3 0202,c,6 想了很久，不知道该如何去写。使用Python的pandas和sql都可以，十分感谢！...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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500 views

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想实现支持通配符查找的字符串到字符串映射，应该使用怎样的数据结构？

就是一个类似 map_with_wildcard<string, vector<string>> 的结构。比如如果已有{'abc': ['aa', 'ab'], 'adc': ['da', 'db']}，那么查 'a*c' 的结果应该是 ['aa', 'ab', 'da', 'db']...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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327 views

1 answer

关于学习MySQL的问题

我是学web这方面的，但是学到MySQL感觉很吃力了。我想问搞web的话数据库要学多少，要学精吗，还是只用学常用的增删改查？如果要学精，有啥学方法吗？?...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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554 views

1 answer

项目用的grunt，在npm install的时候报这个错误请大神帮我看看

...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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238 views

1 answer

Creating a Python list from a map using dictionary get() as a function vs creating a dictionary get() list with a for loop

I was very surprised that a seemingly easier and less taxing function was less efficient. I ran a test on two methods, ... when profiling the two? Why is a for loop so inefficient?...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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561 views

1 answer

vue-router嵌套路由定向问题

存在这样一个路由 routes: [ { path: '/home', name: 'home', component: Nav, children: [ { path: 'index', name: 'index', component: Index } ] } ], ... 达到我想要的效果，但是感觉这样写似乎显得很冗余，请问有其它更好的方法实现吗？...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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270 views

1 answer

java中关于直接插入排序遇到的问题。

在研究直接插入排序的时候，写了个代码，如下： static void zjcr1(int[] a) { int i,j,temp; //由于比较的时a[j]>a[j+1],所以i的循环条件是a.length-1 for(i=1;i<a.length-1; ... 以完成排序的，但是，实际代码执行后，可以完成数组的排序，看了好久页没看明白，大家帮忙看一下 ...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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275 views

1 answer

Can I use prometheus to count all emails sent by django server in one day?

Actually this is the question. How could I implement this? django-prometheus 2.1.0 prometheus-client 0.8.0 django 2.2.17...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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484 views

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clientWidth always returns zero on angular 9+

Hello I want to get width and height from image but clientWidth always returns zero, here is my directive import { ... log(this._elementRef); console.log(width, height); } }...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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542 views

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postgresql - How to convert ja.sql.timestamp to given format using java

Storing the time in UTC timezone in DB.After fetching from the DB Need to convert the time in the given format " ... here + should take care of the summer time as well....

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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611 views

1 answer

sass - Fontawesome icon not showing via CSS

I create css class like below: .multi-dot-dropdown.dropdown-toggle::after { border: none; font-family: "Font Awesome ... show me only: instead of coorect icon? thanks for any help...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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417 views

1 answer

azure - AAD Privilege Escalation

i was reading about AAD privilege escalation in one of the article where the author states that "if you ... . what does assigning credentials to a service principal means?...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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739 views

1 answer

vue 如何实现旋转事件

最近的项目要实现一个转盘转动的效果，所以需要配合旋转事件去做，但是在github上只找到了一个支持vue 1.0的hammer.js，对于2.0只能是可望而不可即了，所以请教大家，有没有实现过类似的功能的，或者是对这个功能有思路的，万分期待和感激你的提点！...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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491 views

1 answer

移动端UC浏览器兼容问题

UC浏览器上input获取焦点，系统键盘回去以后页面高度少了一部分，少的这部分高度大概是系统键盘的高度，旋转键盘可以恢复。请问是什么问题...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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518 views

1 answer

c语言实现顺序栈出错【操作符"="左边的值须为 “左值“

数据结构 typedef struct GOBJ{ bool hoving; int width; int height; int x; int y; IMAGE_PNG img; }GOBJ; typedef struct STACK{ int msize; / ... must be l-value 环境：vc++6 (作业要求) 求解麻烦了 ...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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573 views

1 answer

python如何将爬取的网站url，变成超链接的形式

**这是我爬取的内容，写到了txt文本中，我想让它变成超链接的形式。没有url，直接文字就可以进去到相关的页面。**我该怎么做呢？求大神指点，先行谢过。...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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414 views

1 answer

像素单位和设备独立像素的问题

接触到h5的基础知识，了解到像素是一个相对单位，屏幕的尺寸才是绝对单位，因为屏幕尺寸是绝对单位，所以当这个屏幕容纳更多的像素点的时候，这个屏幕的像素密度(PPI)就高，这个我知道，但是我有个疑问，如果设计师在电脑上设计 ... ？这个时候需要考虑电脑的像素密度吗？因为163px是个相对单位，所以怎么知道在电脑上设计的163px，就在手机上也是163px呢，...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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