Recent questions in Technique[技术]

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vuex和redux 在实际开发中有必要每个组件使用单独reducer,action吗？

难道组件只有一个很简单的异步数据也要创建自己的一套动作文件？这样会不会很麻烦？...

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

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upload.single('file')

在使用multer+upload在后台读取文件的时候总是报这个错误，后台的静态文件夹都能正常的创建成功但是就是报这个错误不在往下执行了！很是头疼。。。。。...

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

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用context by分组后，如何获取每组中除top 1外的所有行

如下图所示，name为a的value有[1,2,3,4]，name为b的value有[2,3,4,5],我context by name后，我要得到每组内除value最小外的其他所有值，即a的[2,3,4],b的[3,4,5]。请问在DolphinDB database中有什么简单的方法？...

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

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axios自定义请求头问题

axios.interceptors.request.use( config=>{ config.baseURL = "http://www.xxx.com"; config.headers['aaa'] = 'sss'; return ... 被放在了Access-Control-Request-Header里面，不是应该是 aaa:sss这样吗...

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

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xamarin.forms - How to implement AdMob native ads in Xamarin Forms IOS?

I'm having a Xamarin Forms application where I could successfully add banner ads and native ads for the android ... EventHandler<UnifiedNativeAd> OnNativeAdLoaded { get; set; } } }...

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

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vue require里面写死可以获取到mp3资源并能播放，但是一旦用变量拼接起来就不行

``` audio.src = require('d:/spring_files/002/20200807/202008071802359818.mp3') ``` ``` const addr = "d:/spring_files" + address audio.src = ... 勿用截图）你期待的结果是什么？实际看到的错误信息又是什么？...

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

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百度地图 JavascriptAPI，拖拽中会出现白色底图

百度地图 JavascriptAPI，移动端拖拽中会出现白色底图，直到松开手至才渲染新的瓦片但是我看百度地图官网没有这个问题，官方地图是手指静止大概2s就渲染了新的瓦片，没找到解决方案到底该咋办啊...

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

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326 views

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MySQL INNER JOIN returning duplicate results

I have the following query: SELECT t2.* ,t3.title ,t3.locale as locale FROM DocumentsTopics t1 INNER JOIN Documents t2 ON ... my query to check in more then one field. Please help...

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

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455 views

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各位大佬用 Microsoft Speech API做文字转语音 Java怎么选择语音库啊？？？

Dispatch voiceItems=Dispatch.call(spVoice,"GetVoices").toDispatch(); int count=Integer.valueOf(Dispatch.call(voiceItems,"Count"). ... of: Voice Description: 80020003 / 找不到成员 ...

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

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java - CardView changes color when expanded

Lately I'm experiencing a very strange behavior with CardViews. The scenario is as follows: I have a RecyclerView ... .isPending()); for testing notifyItemChanged(position); });...

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

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503 views

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开发环境localhost怎么解决 cookie 认证问题？

问题描述：在登录之后，我怎么在 localhost 中获取登录页面（登录页面地址为 39.xxx）的 cookie 呢? 目前我所了解到的方法利用NGINX 进行反向代理利用 webpack 中的 proxy-pass代理上面两种都是 ... 它们是否就同源呢（domain 是否相同）？目前我测试出并不相同，并没有正确读取到 cookie 请各位指点 ...

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

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553 views

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请问vuejs里面计算和监听属性常用吗？我感觉在methods里就可以完成很多事情

请问vuejs里面计算和监听属性常用吗？我感觉在methods里就可以完成很多事情。我一般都是在方法里写好，在created里面调用方法去请求参数。我几乎没怎么使用计算和监听属性。我的做法是不是不科学啊？...

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

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linux - How can I make a secure HTTP request with Java when all I have is a provided certificate in PEM format and a malfunctioning default trust store?

I'm writing a web service which takes a request, authenticates the request's bearer token against an external web ... . Any advice on this matter would be much appreciated....

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

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sql - How to pass in a comma separated list of values as a Parameter input in Oracle

I have a simple select query that I would like to pass in a Parameter in the WHERE clause which contains ... GBL_ENTITY_KEY = E.GBL_ENTITY_KEY WHERE E.ENTITY_CODE = (:ENTITY_CODE)'...

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

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mysql 刷脏页未提交的数据能写入磁盘吗？

mysql 刷脏页的时候，如果有未提交的数据，这时候这个数据能写入磁盘吗？...

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

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367 views

1 answer

dictionary - Java streams: transforming map's values

Having an instance of a Map<A, Set<B>> where B is a POJO with property Integer price (among others), how do I elegantly ... the sum of prices of a given set, for each key A?...

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

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java - How i use my JsonArray in listview android?

hope you all are fine . I am developing weather app in android where android app get data from server in json format. In log file you can see ... ,8,9,9,14,10],[0,0,0,0,0,0,0,0]]...

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

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sql - Two conditions based on subquery. How to shorten it?

I have working query basing on 2 subqueries. SELECT * FROM database1 where account_id in (SELECT account_id FROM (select ... use this two conditions in one line? Is this possible?...

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

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Guidance on Subquery at Expression at MS Access

Have a requirement as below, Table1 having Employee ids and Managers id Query1 having only distinct manager ids Requirement: Create a query ... Empld Manager 1 9 2 1 3 1 4 1 5 2...

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

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python - Finding the second integral of the 2D array

I have the following 2D array: N = 6 M = np.zeros((N,N)) for i in range(N-1): for j in range(N-1): if i ... My answer: 0.77 Correct answer: 0.98 Is there anything I am doing wrong?...

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

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前端使用字体如何避免侵权问题？

似乎很多前端程序猿和设计师都没有关注过这个问题，想问一下在 css 使用 font-family 声明的哪些字体会带来版权问题，哪些是免费常用的？网站上字体所带来的的字体侵权问题是否会体现在 css 的 font-family 声明上 ... 体中发现原来微软雅黑也是需要授权的，那么在 css font-family 上声明使用微软雅黑，属于侵权吗？...

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

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Chartjs bar-chart displays after the jquery function ends

I have 3 charts in jQuery function, chart2 and chart3 get displayed but chart1 ... = groupbyTableRecords(acccount_tables); tempTableGlobal = groupbyTableRecordsBYid(acccoun...

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

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巨佬们 computed里面如何拿到第二次数据，第一次为空

请求回来已经赋值给data中的detail,当我在computed对数据进行筛选的手，就会报错，他自动晒全的是第一次空的数据，就会报错，我也已经在computed中做if detail.length>0 进行判断，但是发现还是不行， $newTick？可以吗...

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

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Apache Flink Stream join using DataStream API not outputting anything

I have 2 streams created using kafka topics and I'm joining them using the DataStream API. I want the results ... going wrong? I can see messages available in the topology Thanks...

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

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javascript - React Material UI Grid footer change

have a problem with customising of footer in react material-ui grid. As shown in the image (below). How do modify the: 1 row selected? Thanks!...

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

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110 views

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关于ajax数据窜的问题？

有一个ajax轮询，每隔5秒钟发送一次请求，先发送请求A，5秒后再发送请求B，如果A请求的返回数据比较慢，B返回了数据A才返回，这时A返回的数据会覆盖B返回的，这个怎么处理？才能不覆盖...

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

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python - Getting a state from gym-minigrid for Q-learning

I'm trying to create a Q-learner in the gym-minigrid environment, based on an implementation I found online. The ... state space in that scenario, to make my Q-table?...

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

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Getting "Method not found: 'Boolean Newtonsoft.Json.Schema.SchemaExtensions.IsValid" in VS2019

I've copied a sample from the site https://www.newtonsoft.com/jsonschema/help/html/ValidatingJson.htm: using Newtonsoft.Json. ... so stupid for asking, but what am I doing wrong?...

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

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