Recent questions in Technique[技术]

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目前在拼湊OHLC上，由于有tick才会生成相相应的分钟k线在一些流动性低的商品，前端需要把每一根OHLC都生成出來，也就是沒有成交的时段，也需要有成交量volume = ... k_line.v = k_line.v.astype(int) print("timer_wholetable", time.time() - t) return k_line...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Echarts 多语言切换

有大神知道ECharts里面如何进行多语言的切换吗？我现在知晓的是可以通过 $.getScript 来动态加载脚本以达到切换语言的目的。想知道，ECharts内部，是否已经有封装好的快速切换语言的方法？如果有知道的大神，帮忙告诉下！...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - React right way to retrieve multiple images from S3 Bucket

I have an array of objects which some of the items within it has a "logo" object containing a key of an image stored ... from S3. Any thoughts how to make it run more smoothly ?...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Schema error using hiveContext.createDataFrame from an RDD [scala spark 2.4]

Trying to run: val outputDF = hiveContext.createDataFrame(myRDD, schema) Getting this error: Caused by: java.lang. ... the data. Let me know if more details are needed...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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vue树形组件递归,每次修改任意一个叶子，都必须触发把节点组装为树的函数吗？是不是效率有点低？

服务器回来的是扁平数组，组装成一个树形根节点，这个步骤Fn函数实现组件递归后，每一个叶子节点可编辑那么每次编辑，都要重新执行一次 Fn吗？是否效率低？如代码：换一种说法介绍一下：从服务器拉取一次数据后因为 ... 给根组件，根组件才有权利更新根数据所以怀疑效率相比一下，请问叶子节点直接修改自己的props 是否合理和高效 ...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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caching - Is there a way to set an expiration time for a Django cache lock?

I have a Django 3.1.3 server that uses Redis for its cache via django-redis 4.12.1. I know that cache locks can ... cache values (cache.set('some_key', 'Hello world', 3000))?...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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android studio 如何交叉编译

点击这个assemble 生成的都是json这是为啥呢？...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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plugins - Subscription based payments via SEPA payments in wordpress

Is there any wordpress plugin that makes it possible to sell 'subscriptions' via recurring payments via SEPA payments ... pay monthly or yearly by SEPA payments. Greetings, Laurens...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - I have to do this task (online shop) using "switch" statements. I got stuck

"Write a Java program to simulate an online store. The program should begin by displaying a list of products and their ... much for reading! Please help if you have an idea....

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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关于iphone下dpr和ppi的疑问。

很多资料上说：DPR = PPI/160 可是为什么，在iphone11 pro里面得到dpr是2，然后官网提供的ppi是458。为什么会这样子?...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - How to have a Discord bot return the number of words in a message

client.on('message', message => { if (!message.content.startsWith(prefix) || message.author.bot) return; ... .guide/creating-your-bot/commands-with-user-input.html#basic-arguments...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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reactjs - How to update side menu item list in an ionic react app after login

I'm creating a mobile app with ionic react and used the "ionic start --sidemenu" option. This is my App.tsx <IonApp> ... have to change my code to make it work? Thanks in advance!...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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excel - VBA: How to enter a value according to another value in the same row but different column

Can you please help me figure out what is the way to enter a value to a cell in one column according to a ... declare it as a range. Input: Fruit Color Banana Kiwi Watermelon...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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uuid太长了简书文章的唯一id的生成思路是啥？

想搞个简书类似的唯一id规则怎么实现起来更合理...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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火狐调试移动端页面，找不到 event.changedTouches[0]

使用epub.js做阅读器，绑定页面触摸事件如题所示，在chrome浏览器是没问题的，但在火狐中报错了，提示：TypeError: event.changedTouches[0] is undefined 试着打印这个事件对象，也是没问题的...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Excel VBA Get Physical Location, not OneDrive URL

I'm used VBA in excel to create some simple files, that should be saved in the same location as the excel file. ... Any ideas how to get the directory path on my harddrive instead?...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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ios - Add functionality to volume buttons in iPhone (Swift)

I want to add functionality to voulum buttons in iPhone but I don't want to change the volume. for example by pressing ... { countLabel.text = String(number.buttonDown()) } } } }...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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使用yarn build --target wc --name joker-form命令生成的js文件会进行语法转换吗？

直接使用yarn build命令打包的时候，经过babel的转化，生成的文件是es5语法而使用yarn build --target wc --name joker-form entry命令生成的js文件是es6语法，有办法转化为es5语法吗？还是我在构建成web组件的时候操作不对呢？...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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How to have multiple same polymorphic relations in one model in PHP-Laravel?

I'm dealing with a challenge where I want to create a polymorphic model Localization. This will include long-text ... null Top 10 Produkte 4 15 AppModelJob Salesman null Verk?ufer...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Nuxt在服务器start后加载很慢，一直转圈圈

nuxt项目上线后发现如下文件加载很慢，左上角一直转圈圈。 commons.app.js vendors.app.js client 请问是什么原因呢？之前做Nuxt都没碰到过，很头疼。要怎么配置webpack吗？谢谢大家。...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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同一局域网内主机发送IP包可以经过网关转发吗

比如我的两台主机IP分别为192.168.31.10与192.168.31.11，网关都为192.168.31.1 主机192.168.31.10上的路由表配置（windows系统）如下： 0.0.0.0 0.0.0.0 192.168.31.1 ... 10不能连接11了按我自己的猜测，这时候不应该走默认网关，然后网关将IP转发到11这台机器吗？...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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关于jquery获取多个元素

选择id为别为id1 id2的两个元素 $("#id1,#id2") 举例 <p class="c1"> ?1 <p class="c2"> 2 <p class="c1 c2"> 3 $(".c1")会选中两个元素 ... 例子来源链接：https://blog.csdn.net/wangjun... 求问：jquery可以这样获取多个元素的原理是什么？...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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typescript范型中 T extends {} 是为了做怎样的限定？

比如这个范型T为什么要继承空对象，它是为了做怎样的限定，为什么这个T使用了非对象的number也不出错？继承空对象的目的何在？ interface F<T extends {}> { (name: T): T; } const func: F<number> = function (name: number): number { return name; }...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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flink DataStream算子中如何实时更新变量？

我在第一个map需要用到变量currentCenter，然后我输出的结果需要更新currentCenter（最后一个map），但是没办法更新，有什么办法更新吗？...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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295 views

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Python爬取拉勾网爬取几页后就开始报错

引入requests bs4 fake_useragent，爬取网页时爬取几页就开始在get_content()报错如果设置的页码是1-10，可以爬取到1-6页的数据；如果设置的页码是8-15，可以爬取到8-12的数据 def download_page(url ... 的部分内容如下.txt格式爬取过于频繁会错误，但过会儿又可以进行爬取，请问如何解决...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript 的全局函数

以下哪些是 javascript 的全局函数(多选题) A. parseFloat B. eval C. setTimeout D. alert 答案是AB 为什么setTimeout和alert不是呢？javascript全局函数的定义到底是什么呢？求求求求求各位走过路过的大佬解答万分感谢...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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462 views

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jquery - JSON multidimentional array to HTML table Laravel

I have a multidimensional JSON array (see array) { "items" : [ { "track" : { "album" : { "name" : "Pressure Makes ... +td1); } It is built in Laravel8 Little help would be nice :D...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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168 views

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PHP如何识别请求地址是一个hash地址？

例如请求的URL是：http://abc.com/#/a。关键在 /#/，PHP该怎么获取到这个字符，并判断请求地址是一个hash地址呢，，试了QUERY_STRING、REQUEST_URI、HTTP_HOST、HTTP_REFERER 都不能获取到。...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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