Recent questions in Technique[技术]

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236 views

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python - A value that need to be extended in time

people. I need to sum values of a data frame in different columns. OUT with the amount invested IN with the amount received DRAW with ... 11 2020-04-10 - 10 12 2020-05-10 - - 20...

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

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630 views

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网站上线后apache很快占用所有内存导致服务器宕机

现有一个公司网站，月访问量6000多ip，更换了服务器配置为4G内存centos服务器，使用apache 2.4作为网站服务器，网站使用伪静态通过代理服务器反向代理访问，刚上线5分钟左右，apache就迅速将内存占满，导致服务器无法访问，而此时同配置的mysql服务器却很正常，只占用不到1G内存。请问这种情况需要对apache做哪些优化？或者有哪些监测方法？...

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

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453 views

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thinkphp3.2.3 error 和 success 提示

在 tp 中，这种消息提示会跳转到对应模板页面，呈现出消息提示，然后跳回原页面，这样比较麻烦，是否可以改对应 error，把错误消息放到 SESSION 中，再次渲染模板时，把提示显示出来，大家给些意见，谢谢！...

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

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198 views

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How to add a value and key into existing JSON file over powershell?

I would like to add an additional key with value into my existing JSON file. Unfortunately I'm not able. Here an short ... is correct and try again. How can I solve this issue?...

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

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276 views

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请看下这段代码中函数的问题

var trs = document.getElementsByTagName('tr'); for(var i = 0;i < trs.length;i++){ trs[i].onmouseover = function(){ this.style. ... = 'white'; } } 请问函数中的this为什么不能换成trs[i]...

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

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373 views

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Xcode 8.2.1 sb（故事板）控件不显示

最近把Xcode 升级到8.2.1，结果发现用sb写的界面，控件不显示（之前Xcode版本显示正常）。捣鼓了下，发现依然没能搞定，如果还没有升级的iOSer慎重，尤其是有sb布局的。 = =...

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

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393 views

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下列程序（m转换为n进制）的时间复杂度是多少，为什么？

SeqStack* convertToType(int number, int type) { SeqStack* stack = new SeqStack; stack->top = -1; while (number != 0) { int ... } number = (number - rest) / type; } return stack; }...

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

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399 views

1 answer

关于CSS实现border的0.5px设置？

网上看到的代码，有些不理解的地方： .custom-border{ width:200px; margin:10px auto; height:100px; border:1px solid #333; background-color:#eee; padding:10px; } ... 是不是在项目中挺少用到的？百度了好久关于scale 的详细用法甚少 ...

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

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566 views

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文件夹内明明有这个文件，执行的时候，却提示没有这个文件

如题权限也加啦 777...

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

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446 views

1 answer

build - Building previous versions of pytorch from source with cuda 11 support

Please provide some guidance for compiling pytorch from source to support cuda 11 in RTX 3090....

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

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440 views

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sql - Filtering query by two values in same ARRAY or STRUCTs in Firebase Analytics BigQuery database

This question is a follow-up to this initial question. In the previous example, we found how to filter an ARRAY of STRUCTs ... is wrong in my initial query and how I can fix it?...

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

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352 views

1 answer

Tools to diagnose Spring application and find out why it starts so slow

? Recently I found out that it took about 10 minutes to start my Spring Application. I googled, but only find ... found out which module in my application needs to be optimized....

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

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4.8k views

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how to load() and view() a function argument [i.e. function(x) ] in R

I'm having trouble with load and view. I want to write functions that will allow me to do a whole lot of things ... [seq_len(ile)] : object of type 'symbol' is not subsettable...

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

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400 views

1 answer

r - How to join (merge) data frames (inner, outer, left, right)

Given two data frames: df1 = data.frame(CustomerId = c(1:6), Product = c(rep("Toaster", 3), rep("Radio", 3) ... left table. Extra credit: How can I do a SQL style select statement?...

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

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566 views

1 answer

google sheets - How do I pull more than 100 rows into Excel on Mac using Web Query?

Hi guys I have been looking for a solution and can't find anything via YouTube ... /1I8gWQy0UYWT36CtHRqb2u9vcCvWWtHyzkEnfOoVY-N4/edit#gid=514129101 Selection=1 Formatting=None...

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

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459 views

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angular - One component ngOnInit hook is called from other component route

I have one root module with two feature module. And i will load the first feature module with route /one. And in ... while routing to /two ngOnInit() hook? Thanks in Advance....

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

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354 views

1 answer

python - How to add rows for a timeseries dataframe?

I am writing a program that will load in a timeseries excel file into a dataframe, then I create several new columns using ... /2020 100 BBB 6/30/2020 CT Hartford 7/30/2020 200...

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

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268 views

1 answer

Angular 10 file download

service with this function to recive the data import { RequestOptions, ResponseContentType, Http } from ' ... RequestOptions deprecated/ Please help me alternative solution.....

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

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695 views

1 answer

Partition by using ID, year and month in Glue

I'm trying to perform a partition using merchant_id, year and month as you can check in datasink. The partition process involving ... least one or more column(s). Thank you all!!...

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

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555 views

1 answer

react-router里面怎么不让某个子路由加载父组件？

这是一个毕业设计的网站，我的意思就是除了登录页面，其他的页面都默认加载frame组件（包含导航条和侧边栏），但是不知道怎么排除/login路由，这是router的代码。...

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

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258 views

1 answer

AFNetWorking 做网络请求的一个问题。

manager.responseSerializer.acceptableContentTypes = [NSSet setWithObject:@"text/html"]; 这段代码是什么意思？...

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

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363 views

1 answer

webstorm如何关闭智能选中单词？

不知道是哪里配置出了问题 webstorm开启了一个自动识别单词的功能，妨碍了双击选中变量名的功能如图，currentSetActive本来是一个变量名，正常情况下双击可以选中整个变量复制粘贴现在他会自动识别变量名中的单词，双击会选中 ... 某一个词了，只能手动去选中整个变量名了无论是驼峰命名还是短横线命名都这样了请问是哪里出了问题？？...

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

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369 views

1 answer

javascript - Unable to change the styling properties inside an iframe body tag

I have written this html script to display wikipedia inside iframe but i want to change the background color of it, below is the ... " height="450px" > </iframe> </body> </html>...

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

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1.4k views

1 answer

h5 嵌入app的cookie的思考

在app里面嵌入h5,现在需求需要用到cookie或者localstorage，经测试在安卓4.2的手机上面关闭app cookie或者localstorage都已经失效了，当前主流的系统手机不会出现问题，现在试想两者真的可以存到我们设置的时间吗？或者说ios和安卓是否有机制，对于webview的两者存储时间会带来影响呢？...

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

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641 views

1 answer

html - R Kable add_header_above adding line on blank spaces

I am unsure if I am doing anything wrong, but I am trying to create a table with a header that groups columns like ... spaces that should be blank. Thank you so much for the help!...

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

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198 views

1 answer

关于JQ position问题。

图是服务器机柜可以自由挪动，我用了Jq-ui，他们都有了position relative属性，我想准确记录他们的位置发到服务器，下次登录就可以看到移动过的位置，但是用position（）.top记录的不准确，怎么才能记准确呢...

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

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199 views

1 answer

How to implement fast-forward functionality for an audio player using JavaScript

I'm trying to implement fast-forward in my app. I've added an event listener to the fast-forward button which ... turn should make forwardTenSecs function run. What am I missing?...

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

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799 views

1 answer

FFMPEG add black bars to a image if the video input is not 16:9

So I'm playing with ffmpeg and I have the command currently: "ffmpeg_path?-ss?seek_time?-i?input_video_path?-vframes?1?-f ... or ideas on how I could do that? Thank you!...

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

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