Recent questions in Technique[技术]

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vue使用函数式组件，render函数里context参数为什么是undefined

图1是创建了1个函数式组件，图二是通过extend()和$mount()生成图1的组件实例，使用时通过vue.$_{name}生成并挂载实例。图3是在运行本地项目时打印的内容，发现render函数的第二个参数context为undefined。求教这是为啥。...

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

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python - I have some sort of weird bug that is affecting the functionality

When I create an add and click the button, it is supposed to take me to the browse ads page, instead it is ... }) #get else: return render(request, "auctions/createAd.html")...

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

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关于time.Timer的疑问

上图中，当需要reset一个时间的时候，如果这个事件当前已经超时，通道里已经有有数据，则需要先取出数据再进行reset，这个我可以理解，但是如图的实现方法不会导致并发错误么？比如在if判断的时候条件不成立，然后当前协程被挂起，定时器 ... 协程被切回来并reset，但此时通道里已经有数据，导致被立刻唤醒？如果我的理解有问题的话请问正确实现应该是什么样的...

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

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370 views

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一个关于数组操作的问题

初始数组为[{},{},{},{}] 当我获得一个对象之后，我要把对象放到数组里，变成这样 [{ 'id':'1', 'name':'xiao' },{},{},{}] 以此类推，请问如何写这样的方法...

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

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umijs如何在build过程中在dist目录下写入自定义的文件

如题再如图，dist目录下是build出来的标准文件。现在想要把cust-files目录下的两个文件也一同写入到dist目录下，不是写进umi.js文件中去。该如何配置呢？...

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

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yarnpkg - Are `yarn link` and `npm link` interoperable?

I know there are subtle differences between yarn and npm. Now I have a library managed with yarn and an app managed with ... manager) ~/the-lib$ yarn link ~/app$ npm link @the/lib...

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

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在对半圆的实现中，border-left 是如何发挥作用的？

这是一个对半圆的实现思路： <div class="half-o"></div> dic.half-o{ width: 100px; height: 200px; border-radius: 50%; background-color: gray; border-left: ... 是和图形属性的绘制顺序有关（比如说，并不是在绘制宽高之后再去叠加边框）？...

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

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javascript - How do I rebuild an array of objects in an array

I have a array of objects that contain array of objects. I would like to know how I can browse it. I tried with a map but ... {name: 'fabrics'}, }], }] Does anyone have a solution?...

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

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html - How to check used libraries on page using python?

So i would like to check what libraries are used on the website and their version. Is there a possibility to do so using python ?...

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

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TypeScript 类型定义基础问题

如下 {workbooks: Site} 这个类型错在哪里一.返回数据类型: { "pagination": { "pageNumber": "1", "pageSize": "100", "totalAvailable": "17" }, ... .project.id === sitesId })) }) 打印 item 如下结构：修改后：...

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

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.localhost后的域名

.localhost后缀的域名有什么作用，比如域名：www.xxx.localhost...

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

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Android Studio Java - looking solution to reset Previous Activity in passed activity

Assume I have 2 activities called "ActivitiyA" and "ActivitiyB". I have an intent that enables me to go "activityB" ... order to satisfy above scenario what should I do? Thanks....

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

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请问 windows 如何像 Linux 使用命令方式查询某个文件夹底下的删除纪录?

请问 windows 如何像 Linux 使用命令方式查询某个文件夹底下的删除纪录想要这样的效果 $ logs D:xxxxxx --filiter-event "deleteEvent" Date: ... user01 Date:2020-10-01 12:05:07.001,,FilePath:D:xxxxxxyyy1.txt,User:user02...

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

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vue :style 动态绑定style，但是同页面中只要访问接口为什么就会刷新一次？

<div v-for="count in 8" :key="count" :style="{ backgroundColor: 'rgb(' + Math.floor(Math.random() * 256) + ',' + Math.floor(Math.random() ... 没有解决方法，拜谢~（别的代码块使用tabs标签页切换一次也会更换一次颜色）...

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

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nvm下npm安装包失败？

nvm的相关信息： nvm version // 1.1.7 npm -v // 6.14.8 node -v // v12.19.0 这个14和10版本的都不行已经按照网上设置了淘 ... ，就是这三个装不上：npm install --save babel-polyfill element-ui vuex-persistedstate，求大佬解答一波 ...

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

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flutter - Waiting for getLinksSteam before continue

my problem is that my app won't wait for getLinksStream to be ready. In my case i want to login with OAuth2 and i ... here? (And sorry for my english. Its not my main language)...

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

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docker安装了nginx和php为什么我打开php他就直接下载不解析

有什么可能导致的，怎么排查...

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

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django - How to create breadcrumb in my view function BY mptt

How to create breadcrumb in my view function? class Category(MPTTModel): name = models.CharField(max_length=50, unique=True) ... with my model? Thank you. I would be grateful....

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

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使用python+selenium模拟手工操作网页，本地运行正常，服务器上面报错找不到元素

label = self.client.find_element_by_xpath('/html/body/div[1]/div/div[1]/div/div[2]/div[2]/div[3]/form/div/div/div/div/input' ... ('new:'+label.get_attribute('value')) 然后点击按钮后，拿不到弹窗...

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

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各位中午好，想问下微信小程序有办法做到识别公众号二维码吗

各位中午好，想问下微信小程序有办法做到识别公众号二维码吗...

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

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856 views

1 answer

laravel - How to solve this error, The GET method is not supported for this route. Supported methods: POST

I'm having a problem with this? How to solve this error: The GET method is not supported for this ... | term-one.edit | AppHttpControllersTermOneController@edit | web | Route File...

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

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php 中的闭包函数

比如说定义一个闭包函数$fn $fn->call() $fn instanceof Closure 这是对象的用法，难道说闭包函数即是函数也是对象？...

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

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961 views

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vue-awesome-swiper 参数设置无效

<template> <swiper ref="mySwiper" :options="swiperOptions"> <swiper-slide>Slide 1</swiper-slide> <swiper-slide>Slide 2</swiper-slide> < ... 的speed autoplay 还有其他一些属性设置什么都没效果怎么回事...

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

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677 views

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文件上传发起POST请求，但是“预处理”OPTION请求在POST请求之后，导致上传失败

遇到到个很奇怪的问题，文件上传失败，在测试服正常，正式服失败了项目前后端分离，在不同域下一个文件上传功能，查看网络请求发现 POST先发起请求，之后才发起OPTION预处理请求 OPTION成功了，但是POST请求失 ... OPTION请求，在发起POST请求的正式服确反了哪位大神能帮忙解答一下，谢谢了这是POST请求这是OPTION请求...

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

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如何将大数组插入到数据库内。

我想将从公众号内获取到的openid插入到数据库内，通过微信接口API获取到的数据格式如下： {"total":133617,"count":10000,"data":{"openid":["ou9QFwleDwTNW9xqYq1H-HVP0H4k"," ... 我使用的后端语言是php，没用过node 有什么好的办法，解决这个问题，谢谢 ...

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

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server - setting up teleport - Configure Domain Name and obtain TLS certificates using Let's Encrypt

ok so what I want to do is set up teleport on a remote machine so i can access it over the internet. I am following ... XXXX how am i supposed to change that? and where? thank you!...

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

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846 views

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保持长连接的4层负载均衡怎么做？

一个服务器向另一台服务器以tcp协议发送数据，两台服务器保持长连接有什么办法负载均衡吗？我开始以为4层负载均衡nginx就行，结果好想行不通，好想只有连接断开，才会分发到另一台，如果一直保持长连接，这个怎么负载均衡？...

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

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513 views

1 answer

react中props怎么定义类型（部分props来至redux，部分来至父级）？

在在react中用typescript时，部分的props属性用redux获取到，但是部分需要父级通过标签属性传递如： export class Demo extends React.Component<{id: string, name: string} ... } {id: string, name?: string} 写代码又要去判断一次，这个怎么解...

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

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