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vue 双向绑定问题$emit无效

父组件变量传给子组件，子组件修改后回传给父组件，无法修改 <div id="app"> <navbar :list="nav" :current="current"></navbar> </div> <template id="navbar"> ... 父组件onCurrent却没有反应，而且父组件的current变量未发生变化; 有哪位大大帮看看什么情况...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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266 views

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js中this指向的问题

以为是基于mod调用，this会指向mod。然而实际是指向全局对象。。。不太能理解，应该怎么分析 var mod ={}; mod.load = function(func){ func(); }; mod.load(function(){ console.log(this); })...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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931 views

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vue devtools报错：Uncaught TypeError

vue devtools没有检测出页面的组件，并且每次点击刷新都会报错突然不能用了，昨天还能用呢怎么解决重装了这个插件还是报错 Uncaught TypeError: Cannot read ... ) at t.s (backend.js:formatted:136) at t.n.emit (backend.js:formatted:997)...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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330 views

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MySQL游标循环问题？

写了一个存储过程，代码如下，作用是将模块表和用户表中的模块id和用户id都查询出来，然后逐一匹配写入user_module表中，但是执行结果确实，只写入了一个用户的数据，其他 ... ,'1483203661','1514739661'); end loop; close attr_2; end; end loop; close attr_1; end //...

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

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598 views

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spring boot - Error in pom.xml: Element docker is not allowed here

Following this question and these instructions, I get the error in pom: Element docker is not allowed here. EDIT: The ... > </publishRegistry> </docker> </configuration> </plugin>...

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

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348 views

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JS 还原问题~~ 比较难

如图，这种情况是严重加密过的吗？有什么办法可以还原吗？求各位dalao帮忙看看~~~...

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

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需求：页面中有两个路由入口，当我点击某个链接的时候我想其中一个做出响应而宁外一个保持当前状态，怎么实现？

如题:画了一个草图望知道的大神告知一下万分感谢...

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

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sql - MySQL: Extracting First Name or Last Name From Full Name Field

In MySQL, I have a users table with a field called name. This name field can contain a full name or just first or last name. See example below ... --------+ | Mike | +------------+...

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

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354 views

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es6中的type是什么意思，一般用作什么地方，最好能举个小李子

看react源码的时候，看到一个type ReactNode=ReactElement | ReactFragment | ReactText 不知道这个type关键字是什么，是否又是一个es6的语法糖，请帮助理解一下...

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

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使用httpclient4.3.1 上传文件的同时添加普通参数，服务端取不到参数

<dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.0.1</version> <scope>provided</scope ... = request.getPart("path"); 这个是有的但是变成流了...

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

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How to include field value inside columnHeader - Jasper Reports

I have the code below with a field named 'anneeFiscale' that is used inside a title section. I want to use that ... jr:table> </componentElement> </band> </detail> </jasperReport>...

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

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435 views

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使用sequelize查询出来的createdAt字段格式问题

使用sequelize查询出来的createdAt字段，是“Tue Mar 14 2017 16:02:21 GMT+0800 (中国标准时间)”这样的字符串。怎样恢复原有格式或者进行自定义的格式化？...

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

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418 views

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How can I change the background color via a manual boolean input toggle in Pine?

I'm new to Pine Script and try to change the background color of the chart based on a boolean, which I manually can ... t know how to fix this. Could anybody help me with this?...

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

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513 views

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nginx 如何配置反向代理调度多台服务器？？

nginx 如何配置反向代理调度多台服务器？？使用虚拟机开了2台服务器，主系统电脑一个，如何配置反向代理？？负载均衡调度这三台服务器？？希望大神详细介绍下...，谢谢。...

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

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526 views

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webpack图片能加载，能在本地加载服务器，但是map纹理图片还是不能映射，本人小白

现在图片可以加载，但是还是不能显示，我把loadTexture里面的图片路径写成绝对路径也不行我试着换了其他图片但是还不起作用，不是图片问题,THREE.TextureLoader写法也是对的啊...

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

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354 views

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关于export default 和 module.exports 区别

关于在vue2中导出文件的两种方式,对export default 和 module.exports 的区别理解不是很明白...

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

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497 views

1 answer

为什么给app写接口时，要用echo 返回 json数据?

给 app写接口时，要用 echo json_encode() 来返回数据，但是PHP自身调用却用 return json_encode();...

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

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526 views

1 answer

flutter - Have multiple channels open on one project in Agora for enterprise project?

It's a bit hard to summarize my problem into a question, so bear with me. In the Agora documentation, they give usage ... boils down to the question, how do I make a channel?...

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

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android - Unity IAP Initalisation fails due to NoProductsAvalible (Google)

When testing Unity IAP in the Unity Editor everything works perfectly, however when running on an actual device, nothing ... Below are the IAP errors from Logcat. Thanks, Zak...

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

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c - goto statement leading to an infinite loop

We were having a quiz of sorts and had the following question where we had to find the error, or if there's none, ... variable going way below 0. Could anyone help me with this?...

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

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909 views

1 answer

laravel - How to chage redirect route after email verification in Laravel7?

I have email verification url as below created by laravel email verify route. http://localhost/myproject/public/ ... somewhere on this would be greatly appreciated, Thanks....

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

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537 views

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载入页面时与 http://localhost:8080/__webpack_hmr 的连接被中断。

按着vuejs教学视频更改代码之后但是页面并没有显示改动，上图是浏览器控制台的提示。代码如下，可以编译成功，但是修改的内容并没有体现。...

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

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1.1k views

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set storage of an object of arrays in Ionic 5

I have an ionic 5 app to be build for browser. I have installed @ionic/Storage, etc. I have a function in my service ... ... maybe I am just tired. Your help would be appreciated....

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

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327 views

1 answer

python2.7版本，opencv2.4.9版本，如何写能调用我的这个文件显示出我图片中的大象？

python2.7版本，opencv2.4.9版本，我做了一个自己的分类器，最后生成了一个data.xml文件（识别大象）,请问python代码如何写能调用我的这个文件显示出我图片中的大象？下面这段代码是识 ... .waitKey(0) cv2.destroyAllWindows() 请问python代码如何写能调用我的这个文件显示出我图片中的大象？...

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

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285 views

1 answer

C++ UWP Storage Access

After rescap capability configuration and privacy setting File system allow still we cannot access File system and other drives to ... i cant access assets folder *.png file also....

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

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214 views

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Vue中设置marked的属性

效果是这样的我在methods里面写了个markdown函数然后在mounted的时候调用了一下但是！什么东西都没有生效我还是贴个代码吧 <template> <div id="editor"> <textarea v- ... : true, smartypants: false }); } } } </script> 上面就是本页面的所有代码...

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

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330 views

1 answer

重新安装ubuntu出现挂载点问题

titleubuntu重新安装出了问题 ubuntu系统出了问题，现在打算重新安装，保留原来的软件和文档。结果出现如图错误，显示："两个文件系统SCSl1=(0,0,0),第1个分区(sda)和第二个分区SCSl2(0,0,0),第三个分区(sdb)被分配到同一挂载点/boot/efi上请通过改变挂载点来修正比错误"。点击确定后显示如图所示!...

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

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285 views

1 answer

regex - How to keep only specific item at Combobox

I'm newbie here, and new to programing c#. I am using Microsoft c#. I want to know how to keep only specific ... only in ouput combobox2 when click on button1. To become like this...

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

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