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786 views

1 answer

c/c++ 为什么函数中定义变量不会出现像 struct 中因内存对齐而导致的空间浪费

c/c++ 为什么函数中定义变量不会出现像 struct 中因内存对齐而导致的空间浪费例如在struct中 int a; char b; int c; b 后面会有 3Byte 浪费的空间但是在函数中同样顺序定义变量 a b c 却不 ... 和声明顺序不一样如果这是编译器对函数中声明变量的优化的话，为什么不对 struct 的变量顺序也优化一下呢 ...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

719 views

1 answer

sql - Azure - Enable/Disable database setting for security purposes

We have certain security requirements in order for our app to go live within our orgainisation. We are using the ... clr enabled'; How to we update these settings? thanks....

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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529 views

1 answer

python 3.x - Triple for-loop in a vector

I have a simple numpy array (3xN) like: v = np.array([[-3.33829, -3.42467, -3.53332], [-2.67681, -2.6082 , ... rows from v. How can I implement it on Python in a fast way?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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947 views

1 answer

Vue的element ui的icon 不出来（显示的都是方块）是什么原因导致的

package.json里面 element的版本是最新的在mian.js里面 import ElementUI from 'element-ui'; import 'element-ui/lib/theme-chalk/index.css'; Vue.use( ... 了element的字体所有的图标都不显示，这可能是什么原因导致的呢？...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

1 answer

jquery datatables导出excel 如何设置每一列的宽度？

buttons = [ { extend: 'excelHtml5', text: '导出EXCEL', title: tableData.printTitle, //exportOptions: { // columns: tableData.printColumnsData // ... sheet).attr('s', '9'); //} }, ];...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

1.1k views

1 answer

Initialize instance of internal discriminated union from F# to C#

I have a discriminated union type exported via a dll from F# to be used in C#: type Argument = | IntValue | FloatValue ... as internal, is there a way to initialize them in C#?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

1 answer

emacs - How to create hyperlinks for noweb references in org-mode

I'm wondering if there is a way to add hyperlinks to noweb references, i.e., in the following org-mode snippet ... anything about this. This would be an invaluable feature to have....

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.2k views

1 answer

把服务器yum删除了怎么重新安装yum？

在网上搜到的方法也报错，应该怎么弄呢？...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

1.1k views

1 answer

c# - When I run the application it runs on two ports

I'm developing a web app with C#. Whenever I run the application using Visual Studio, two browser tabs open and the ... attach", "processId": "${command:pickProcess}" } ] }...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.2k views

1 answer

php - Accessors on relationship not working in Laravel

I have two models Cart and Products On products model I have an'accessor: amount $appends = ['amount']; public function ... $this->hasMany(Product::class,'id','product_id'); }...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.3k views

1 answer

python - To group number of data upto a certain limit

If anyone could help me out to solve this?problem, that would be greatly appreciated. Here I have a list of weights ( ... module or easy way to group this, please kindly assist me....

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

1.2k views

1 answer

求一个移动端树形组件

背景:移动端 ,需要一个类似于树形控件的组件点击列表的某一列,会重新渲染列表并在旁侧显示面包屑,可以勾选某一列的checkbox 父子级严格相关嗯目前就这么多...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.6k views

1 answer

flutter - How can I initialize my app with provider?

I choose to use provider as my state management so I saw I have to use Multi provider. My struggle is how to architect my code ... title: 'Flutter Demo Home Page'); } }), ); } }...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

1.3k views

1 answer

在这能有机会得到一个前端大师成为我的mentor吗

没有具体的问题. 之前学习过Vue,能写一些页面了. 因目前在学习React,因项目时间紧.想快速学习进入状态. 但是有一些概念性问题或者逻辑的理解不是到位. 如果每个问题拿出来问问题,又显得太琐碎. 同时对前端这些还是挺感兴趣的.所以未来还有不少问题和困难. 希望在这能找一位mentor. 可能你的三言二语就能帮助我尽快入门. 哪位兄弟姐妹可以帮忙吗?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

1.6k views

1 answer

ide - New Google Apps Script Editor - Additional Bound Projects?

In the legacy Google Apps Script Editor, you could easily create additional Projects that were bound to the parent Sheet / ... this feature gone, or am I just missing it somewhere?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.0k views

1 answer

java这门语言好不好学呢

java好不好学？...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.7k views

1 answer

python - Set values of pandas df cell based on conditions

My df is as follows: What I want to do is, Condition: Fruit Name is NOT (Apple or Mango) and veggie Name== No ... so as follows It sets NaN to other cells What am I missing?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

3.0k views

1 answer

antd的master分支怎么找不到table的sticky的代码？

代码地址: https://github.com/ant-design......

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

3.2k views

1 answer

powershell - ErrorActionPreference=stop stops all scripts stack

Consider the following: // Calling-Script.ps1 Write-Output "Calling script" ./Failing-Script.ps1 Write-Output "Calling ... .ps1 stops? Does this make sense? is it documented?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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3.4k views

1 answer

关于Typescript泛型约束和如何得知泛型的具体类型

在C#中的代码是这样的 public IFsm<T> CreateFsm<T>(T owner, string key, params FsmState<T>[] states) where T : class { string typeName = ... return fsm; } 在typescript中如何做这种泛型约束，如何去获取owner的类型？...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

3.4k views

1 answer

javascript - What is the difference between client-side and server-side programming?

I have this code: <script type="text/javascript"> var foo = 'bar'; <?php file_put_contents('foo.txt', ' ... in to account when you see answers talking about specific languages....

asked Jan 25, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

3.5k views

1 answer

如何测试出服务器单次可以向外发送多少条请求

准备了一台 Linux 服务器用来向微信发送小程序的订阅消息。因为单次需要发送上万条推送，每条推送都要等待返回结果。请问下，如何测试出这台服务器单次能向外发送多少条请求？...

asked Jan 25, 2021 in Technique[技术] by 深蓝 (71.8m points)

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3.7k views

1 answer

利用window.location.href下载文件后，要如何返回原页面？

已知： window.location.href="http://文件名.后缀名" 等同于 <a href="http://文件名.后缀名">下载</a> 如果文件是图片，音频的话，利用这个方法可以预览文件，此时按返回键会回到原页面但如果 ... 标签的download方法在原页面下载的原因是因为我的项目是开发的微信公众号网页，这个会触发微信的下载屏蔽 ...

asked Jan 25, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

3.5k views

1 answer

canvas画出来的字体颜色和dom渲染的字体颜色有色差

请问是不是canvas画出来的字体颜色和dom渲染的字体颜色会有明显色差啊？我canvas画出来的字体明显要比dom里的字体颜色暗一点，但是设置是一样的粗细和颜色。...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

4.1k views

1 answer

python - For data with a `set[int]` value, what fast means exist for grouping based on having at least one common member?

Currently, I am tackling such a problem by parsing through each set, picking each member, adding or skipping said member ... categories and then to do all the setting at the end....

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

3.2k views

1 answer

lxml如何处理内容带html标签的元素？

写爬虫的时候，遇到一个元素，其text里面是html格式：获取这个元素的text_content()，lxml就傻了，出来一大堆东西：它不能识别出这是内容文本，所以不知道应该停止。请问这种情况应如何处理？谢谢。遇到问题的页面在这里： https://www.cnblogs.com/cate/......

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

3.3k views

1 answer

Web Worker 如何观察 Worker 线程状态？

RT，我在Worker内部创建了一个WebSocket（高频），结果性能改善不明显会多出一个websocket链接，在它下面的是在Worker内部创建的ws，我注意到它有一个特殊图标。...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

3.7k views

1 answer

替 Button 添加onClick属性后点击报错

...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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