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mysql 大神加上了解股票最大回撤率的大神进

最大回撤率=（资产新高-资产新高后回调最低点）/资产新高的最大值请问怎么算？...

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

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570 views

1 answer

本人是前端实习生，目前在一家小公司做事，老大突然要求我必须会c#....

请问一般要多久才能入门，做东西，看什么书或者视频。。。。。...

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

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386 views

1 answer

javascript - Waiting for the contentscript to finish before looping next item in background script in chrome extension

I'm trying to make a Chrome extension, but got a bit of a headache due to the whole asynchronous programming and ... some more information to make it as clear as possible! Thanks!...

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

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315 views

1 answer

python - String with timestamp changing in airflow dag

I am trying to use the datetime as a unique identifier for a s3 folder that I create in an airflow dag. ... reason they are changing. Does anyone know why this is happening?...

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

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501 views

1 answer

iis 10 - IIS 10 : MS Server 2016 : ColdFusion 2016 : 500 Server Error

I got ColdFusion 2016 installed on MS Server 2016 running IIS 10. The ColdFusion Administrator Runs Fine off the local IP. ... " : it worked Now the 500 Error - likely permissions...

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

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530 views

1 answer

time machine 会备份多个用户的资料吗

time machine 会备份多个用户的资料吗？还是说只会备份当前用户的资料？...

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

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337 views

1 answer

laravel where 条件数组查询

现在有这么一组数组,这个数组也是动态查询到的 $categories = [1,2,3,4]; 通过这个数组在查询 Posts = 1 或者 = 2 或者 = 3 或者 = 4 难道要写 foreach 吗 $A ... 如何直接得到 $posts 总集合呢 } 求大神妙计，查询多个 category_id 的 posts 大神快出现吧 xixi...

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

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203 views

1 answer

javascript - ARRAYFORMULA with getNotes

Is it possible to use an Arrayformula to populate the entire column on the formula "getNotes"? https://developers.google.com/apps- ... (row(B2:B), column(B2:B))) does work fine....

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

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238 views

1 answer

javascript - Counting the occurrences / frequency of array elements

In Javascript, I'm trying to take an initial array of number values and count the elements inside it. Ideally, ... ridiculously complex. Any help would be appreciated! Thanks :)...

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

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1.1k views

1 answer

vue-router auth验证怎么做？

router.beforeEach((to, from, next) => { if (to.matched.some(record => record.meta.requiresAuth)) { // this route requires auth, ... 赋值的值，想请求auth验证有什么其他方案？ Thanks you in advance....

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

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708 views

1 answer

如何解决127.0.0.1和局域网ip地址访问速度很慢的问题？

我在命令行下ping 127.0.0.1和内网ip192.168.1.248都是正常的，能ping通，但浏览器访问IP地址就很卡很卡，我换了多个浏览器都是这样，这是为什么呢？求解答~...

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

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633 views

1 answer

react-native fetch跨域请求返回的Response.ok==fase,但控制台已经显示能够获取到数据

在用 fetch API 实现跨域请求时，遇到这个问题，跨域请求是成功的，但是返回的 response 中 body 为 null ,response.ok==false，在chrome浏览器可以看到，返回的数据已经有了，我使用是 ... => { console.log(resData); }) 这样打印出来的，显示有错误，不知道是什么问题？...

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

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259 views

1 answer

swift - Change google CSS in WKWebview

I'm trying to set the background color to red for google in my WKWebview It flashes red for a brief moment, then when google ... : nil) } } } Why doesn't the background stay red?...

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

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716 views

1 answer

merge - Delphi embedding localized DLL data to EXE

From Delphi compiler (10.x) I got both app.exe and app.enu files. The app.enu file contains localized english ... obvious solutions. Or may be simply not something possible...?...

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

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441 views

1 answer

go语言中在变量后加上接口是什么意思？

如题刚刚开始学习go 语言有些不懂： a.Data = make(map[string]interface{}) 我认为它是在申请a.Data map为字符串类型的空间，那么它后面接一个空的interface是什么意思？...

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

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313 views

1 answer

java - How do I access a field from a class that is created using @JsonSubTypes?

I am using Lombok annotations in every class and the code is as follows : public class DtoClass { private Vehicle metadata ... } but I only need the value of the variable carModel....

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

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468 views

1 answer

flutter - default link open after deploy firebase

I am doing flutter web app hosting in firebase. I create first default link in firebase and this link working ... Firebase Hosting Setup Complete window So what should I do?...

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

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165 views

1 answer

关于BFC的特征，为什么说内部的box会在垂直方向一个接一个放置？

BFC的特征有以下两点：内部的Box会在垂直方向，一个接一个地放置每个元素的margin box的左边，与包含块border box的左边相接触(对于从左往右的格式化，否则相反) 即使存在浮动也是如此这两点我十分不明白，为 ... box相接触吧，为什么会是border box呢？（为了方便浏览把疑惑的问题加粗了，不是为了博存在感，请见谅~）...

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

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210 views

1 answer

tried a example from a c tutorial site kinda got it wrong

I was learning about recursion in C from https://www.tutorialspoint.com/cprogramming/c_recursion.htm and I tried the number ... what return does and just kinda went with the flow....

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

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610 views

1 answer

javascript - How to collapse and expand antd TreeSelect items on click of a button?

I am using antd library for developing my website. I am using TreeSelect component to show some nested options ... Options button On 2nd click of Expand/Collapse Options button...

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

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353 views

1 answer

python - input a function, get "str" object is not callable

I'm trying to make a command prompt style program in Python. I want to have a list of possible functions to run, ... ") input_command() input_command() I'm a beginner with Python....

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

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447 views

1 answer

js数组有forEach的遍历方法，能不能给json对象也写一个这样的方法方便遍历？

如题。。。。。。。。。。。。。。。。...

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

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331 views

1 answer

android - Program type already present: org.apache.xmlbeans.Filer

I am having problems to use Poi to read docx file to convert it to pdf in Android. In my gradle I have: implementation ... with Android O (--min-api 26) Can somebody help me?...

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

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534 views

1 answer

amazon s3 - NiFi PutS3Object Error - Connection TimeOut

I am trying to add a file to S3 bucket using NiFi. I have configured IAM role for authentication. Getting the error ... am able to transfer file to S3 bucket using aws cli....

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

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435 views

1 answer

vuejs中使用多个组件库样式冲突

vue的使用者你们谁用到过一个项目中使用多个开源的库的情况。这个时候会出现组件的样式冲突。请问怎么引用组件的样式才能做到唯一且样式不冲突...

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

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716 views

1 answer

sublime text3怎么格式化jsx代码

用了jsfmt 和jsformat 还有HTML-CSS-JS Prettify 格式化后如下 render() { return ( < div className = { style.main } > < MusicFolder / > { this.props.children } < /div> ) } 请问怎么配置呢，拜谢...

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

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177 views

1 answer

这个有什么用，好像不加这个也没事

...

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

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488 views

1 answer

reactjs - Pass props from parent to children in react js

I have 2 components. The component A is the parent component: const A = ({children}) => { const ... this <div className="test"> wrapping my <MyChildrenComponent/> ?...

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

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