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RT 我想做一个根据路由参数不同，进入的时，下拉框默认选中不同的功能 const [selected, setSelector] = useState<number>(0) useEffect(() => { // 这个useEffect应该每次进入页面都会执 ... 之前的值当点击下拉框展示下拉列表的时候，才会正确的显示新的值这是为什么呢？？？？...

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

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Spring的循环依赖中的三级缓存

如题，我所了解的循环依赖是通过三个哈希表来分别存储已初始化，已实例化但还未注入属性和初始化和进入实例化阶段的bean来解决的 private final Map<String, Object> singletonObjects = new ... 储的是Bean定义的信息，但它也是一个ObjectFactory？不知道这么理解是否正确，希望有人指点一下？...

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

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vue3没有$children了，那怎么获取子组件的实例。或者有什么代替方法

vue3没有$children了，那怎么获取子组件的实例。或者有什么代替方法场景：在Swiper父组件里对SwiperItem前后各添加一张图片,还有动态修改SwiperItem的样式因为swiper渲染swiper-item用的是slot，所以没办法用ref...

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

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getHomeDir()得到的路径有双斜杠//

本地GUI远程连接服务器上容器内的数据节点,路径下为何有两个//...

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

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vba - How to exclude certain documents from macro that sends e-mails?

We have a macro that sends e-mails of documents in a certain directory. We want to exclude documents whose file names ... exclude certain file types, but these files are all PDFs....

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

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c# - MAPI in .NET 5?

I want to open the default email client on the computer with presetted values for from, to, subject, body and ... achive this? The target mail client is Tobit David. Thanks!...

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

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mac系统怎么安装基于APR的Apache Tomcat本机库

[main] org.apache.catalina.core.AprLifecycleListener.lifecycleEvent 在java.library.path:[/Users/muyuchen/Library/Java/Extensions:/Library/Java/Extensions ... 一直报这个错误，这个APR是啥啊？（新手一个）...

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

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javascript - Ionic React route changes url, page is blank

I am workin with Ionic 5 and React. I have a component called ShowListing that i am trying to display after being ... displayed, even after refresh. Any ideas how to solve this?...

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

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618 views

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asammdf - how to combine two datasets to make one combined plot in python

I have a dataset of 6 parameters with 500 values each and I want to combine the two of the datasets to get the ... class 'numpy.float64'>'; only Series and DataFrame objs are valid...

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

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AWS Glue custom queries to DocumentDB

A few months ago I took over an ETL project using AWS Glue. Currently, we are querying all records from DocDB then ... store as JSON in an S3 until Glue processes the records....

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

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android沉浸式全屏最简单的做法是什么？

看了很多文章，有的提示API过时了，有的不生效，我需要的是这样的效果，最好是代码设置就好了...

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

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java 数组申明区别

List<String>[] AssociatedCompany = (List<String>[]) new ArrayList<?>[]{}; List newList = new ArrayList<String>(); 为啥上面这个申明没有add 添加元素的方法，下面这个就有add 方法呢？这是为啥？...

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

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go 判断文件的问题

写了一个文件遍历的，发现死循环排查问题发现是 s.IsDir() 问题 if s, err := os.Stat(path); err==nil{ // 抛出错误 }else{ return s.IsDir ... 1-5-18 ### $Recycle.Bin FAIL Cherry/Core/Choreser 3.454s ...... 无数相同输出...

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

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Maven plugin-development - How to detect modified files?

I'm writing new maven plugins, I've successfully used StaleSourceScanner in a combination with SuffixMapping, but it is ... " + classesDirectory, e); } return effectedFiles; }...

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

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子元素旋转90度，如何正常的撑开父元素（高宽对应）

如题，正常撑开，而不是子元素的宽撑开了父元素的高...

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

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js分解url地址

http://111.111.11.11/igserver... js怎么分解url比如 http:// 219.142.81.86 / igserver / ogc / kvp / TAS10R52000J49 / WMTSServer 我要的是TAS10R52000J49这一个...

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

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vue 计算属性所创建的watcher也是有getter、setter的吗

计算属性是依赖于用户watcher才会发生改变的，这样的话，它还有getter、setter的吗...

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

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azure - x5t JWT Thumbprint Python Conversion

I'm trying to generate an x5t parameter for a header to make a request to Azure using a certificate to authenticate. In ... x5t = base64.b64encode(x.encode()).decode() print(x)...

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

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问一个grafana的问题

grafana就是从某个数据源查询数据，比如说mysql数据源，这样写 SELECT date( `created_at` ) AS time, sum( `min` ) AS MIN, sum( `max` ) AS MAX FROM reward_log GROUP ... 务器cpu的使用率，有什么好的采样软件把数据采集好给我存起来呢，我自己取就好了...

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

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java - How to define resilience4j Fallback method when my actual methods has varargs

We are using resilience4j Circuit Breaker, our monitored methods have varargs and return types are different so how can we ... as Exception as I have varargs as the last parameter....

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

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为何网页上显示的dom元素,放入闭包的数组中后,就会从页面上消失?

let factory=(function(){ let arr=[]//形成闭包 return { create(){//获取对象 if(arr.length==0){ console.log('新建了元素!'); var div=document. ... 如上,从网上学习对象池的过程中,发现放入闭包中的dom元素不会在页面上显示...

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

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java - Spring boot - automatically activate profile based on operating system

Let's say I have a spring profile that is specific to a particular operating system: spring: profiles: mac cloud: zookeeper ... be active if os.name contains "Darwin"? Any ideas?...

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

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为啥每次只有刷新页面才能执行这个动画,从其他页面跳转过去动画不生效,没有使用keep-alive缓存?

...

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

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1.3k views

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js如何响应滚动条的点击事件？

<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0" /> < ... 面上有很多元素，我只想监听滚动条滚动时的事件，需要每个都进行绑定吗？...

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

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vscode打开设置 ctrl + , 失效怎么处理?

...

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

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1.5k views

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themes - Unable to add to cart on my website. Some Javascript Bug?

I am using this theme for my personal project. My support has expired and theme developer doesn't really care to ... : https://click-demo.myshopify.com/products/basic-swear-shirt...

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

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Vuex里面的commit为什么会让prototype里的值响应式改变

如图，我在main.js设的prototype的值，当左侧第一个点击事件的时候，无论怎样都不会响应式改变，但是在红点第二个点击事件里却是响应式改变了，为啥，百思不得其解，图二是我手写的vuex里面state赋值方式，直接用VUEx插件也是一样的，commit怎么会引起prototype里面值的改变呢，求大佬解惑。...

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

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网页跳转如何保留上个页面的参数，以便返回时保持相同的状态？

页面A是有本身需要用到的queryString传过来的两个参数叫firstSubject和secondSubject，这两个参数页面B不需要用到页面A还有筛选按钮，点击筛选按钮跳转到筛选页面B，因为有三个不同的筛选类型（等级，地区，专业）， ... 目前的做法是都通过queryString传，但是觉得逻辑很乱，代码可读性很差大神们有什么好的方案推荐吗...

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

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