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mac 上终端打开很慢，顶部会先bash->git->ruby

为什么每次打开终端，顶部会先bash->git->ruby 什么的，最后才出现命令行？...

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

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r - Display a button when the shiny app launches for first time that will lead to tabItems content

I have the shiny app below which includes tabItems. I would like when the app is launched for first time to display an actionbutton ... , "sidebar", selected = "conse") }) } ) )...

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

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java - Spring-mvc applications failed run on tomcat server (404 error)

I created spring mvc applications with the required dependency and the controller but the problems is when I run the ... screen shot when I run the applications on tomcat server....

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

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python - Output returns 2 instead of 1 for Codeforces

In my program, everything works fine for the problem, except one test, where the input is shown here: This is my code: ... why it returns 2 instead of 1. Could someone help me?...

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

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regex - Merge two dataframes on string columns with values containing wilcards as for like in SQL - Python

I want to merge 2 dataframes on string columns with values containing wildcards as we can do with like in SQL. Example : import ... ) but can I use it in this case with a merge?...

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

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regex - Merge two dataframes on string columns with values containing wilcards as for like in SQL - Python

I want to merge 2 dataframes on string columns with values containing wildcards as we can do with like in SQL. Example : import ... ) but can I use it in this case with a merge?...

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

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css - Scope svelte component styles even when global operator is used

I have created generic svelte components which I want to add to an existing project. The components make use of third ... in svelte apps, but even leaking outside the shadow dom...

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

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svn maven项目的依赖不起作用

当我引用一个svn的maven项目时，我么maven projects下没有maven依赖，项目中也没有对应的jar pom.xml文件代码 <project xmlns="http://maven.apache ... <finalName>meetmecar_test</finalName> </build> </project> 请问我改怎么修改？...

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

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微信小程序视频不能循环播放吗？

查了所有的资料，依然没有找到答案。希望大神解答一下...

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

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maven 从私服拉取时总是生产part.lock文件，并且一直卡在哪里

maven 从私服拉取时总是生产part.lock文件，并且一直卡在哪里，这个问题有人遇到过吗？怎么解决...

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

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同一wifi 笔记本连接不稳定但手机却正常

安卓手机和笔记本连的都是同一Wifi，为什么笔记本就老是断呢？原因是什么呢？很多同事改插网线了但是Mac没有网口啊想用有线都用不了下面是笔记本网 ... is down Request timeout for icmp_seq 6 ping: sendto: Host is down Request timeout for icmp_seq 7...

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

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R importing .csv data with date as first field erroneously

This is absolutely maddening! I am trying to import a basic, simple file that has dates as the first field. If I ... come across this. This is a very basic, straightforward file....

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

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python爬虫字符编码错误问题

爬百度百科的内容 response=urllib2.urlopen(url) if response.getcode()!=200: return None html=response.read() return html.decode("UTF-8") 再写入 ... in position 15 我用的是UTF8编码的东西写入，怎么和gbk有什么关系？？...

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

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这个正则表达式为什么不行？

任意中文字母数字但是我试了中文为什么通不过？一直都是no 英文就可以通过这是为什么？ if(preg_match("/^[a-z0-9xa1-xff]{1,8}$/",$username)){ echo "yes"; }else{ echo "no" }...

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

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css 三角形缺口，

如图：这个三角形缺口是透明的，请问咋个实现大家请注意问题的关键，三角形能看见后面的背景...

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

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Netty的future.channel().closeFuture().sync();到底有什么用？

我看到很多Netty的例子都在末尾加上了这句话：future.channel().closeFuture().sync(); 比如: public class TimeServer { private int count = 0; public void bind(int ... 10000); } } 但是我看这行代码一直没有执行请问这是怎么回事呢？...

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

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javascript - How to check in Nunjucks if an array contains another array value with Eleventy

So I have some books data coming from a JSON API. For some of the items in the API, I have created a page in ... localBooks.find(element => element.fileSlug === apiBook.slug); });...

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

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Getting latest date with count of customers in R

I have the following data: Date_X <- c('2020-01-01','2020-01-02','2020-01-03','2020-04-01','2020-05-01' ... has 100+ showrooms and 1000+ items] The output desired is like this:...

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

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exe4j 打包 spring-boot 应用报错

java.lang.NoClassDefFoundError: BOOT-INF/classes/com/example/DemoApplication (wrong name: com/example/DemoApplication) at java.lang.ClassLoader. ... 还是本身这个程序就不能用 exe4j 打包吗...

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

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python - Colormap diverging from black instead of white?

I would like a diverging colormap that has another colour than white (preferably black) as it center color. Neither ... to create an own colormap, or are there existing ones?...

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

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javascript - how to make text-area like in google colab?

output is going and going on line by line and consuming my pc's resource.see this screenshot I want to only leave last 50 lines of code ... ); @ flush(); sleep(5); } echo '</pre>';...

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

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js中递归调用时参数是否会改变

如下所示的一个递归函数，为什么args.concat(i)没有根据循环增加？args是一个引用类型，在我的想法中，这个args会在循环时把0-9都放进去 var loop = (fn, n, args = []) => { if (n ... loop((...a) => console.log(a), 2); //结果: [0,0] [0,1] ......

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

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315 views

1 answer

electron-tabs

最近在用electron-tabs,因为是新手，需要大神指教，有人用这个嘛，欢迎指导。希望可以分享一下心得。...

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

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InetAddress.getLocalHost() 为什么耗时5s？

InetAddress.getLocalHost() 这个方法我在本地测试，无论怎么测试都是5s，这个函数是哪里会这么耗时呢？我用的jdk是1.7...

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

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python如何吞任何形式的异常？

经常看到有些模块，任何异常都不会崩溃，然后还是继续运行代码，自己试过在程序最外面加上try ----catch----但是好像并不能把所有错误信息都吞了，好像只对块内代码起作用，要是跳到另外的方法仍然会抛出异常，那种吞异常的是怎么写的呀？我现在有个需求要求代码一直跑。即使有异常也不能退出。。。请教各位大神指点...

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

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html - Stop button from moving to line below

I'm adding buttons to a site and one of the buttons is moving to the line below, how can i correct this? id like the buttons to be ... "> Next </button> </div> </div> </div> </div>...

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

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python - Complex Find and Replace String

#!/usr/bin/env python3 data = 'Machine 1 memsize = "3500" sga = "true" vCpu = "2" Machine 2 memsize = "3578" sga = "true" ... 4 memsize = "4200" sga = "false" vCpu = "5" ... '...

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

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220 views

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用PHP如何实现分数排名,有什么好的思路?

对学生成绩做一个排名,分数为一个数组,排好名次后输出排名结果: 比如 $scores = array(90,100,100); 自定义函数实现返回数组 $rank(3,1,1);...

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

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