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861 views

1 answer

项目表+订单表，需要查询所有项目的订单总额,现在订单表没有status=1的数据的话，查询结果就不显示所有项目 Project::leftjoin('orders','orders. ... total_money') ->groupBy('project.id') ->orderByDesc('total_money') ->paginate(10);...

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

0 votes

632 views

1 answer

es6怎么获取对象中的数组对象的个数

怎么样获取这2个数组对象中children的总和呢，也就是length为8...

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

0 votes

942 views

1 answer

data science - Running cookiecutter project

I don't understand how to run this GitHub project made with cookiecutter-datascience template https://github.com/hamishgibbs/facebook_mobility_uk...

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

0 votes

1.0k views

1 answer

c# - Getting PayPal Access Token with RestSharp returning "Status Code: NotFound"

Getting PayPal Access Token not working I'm getting the response: "StatusCode: NotFound, Content-Type: ... suspicions regarding the issue being the grant_type being correct?...

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

0 votes

1.0k views

1 answer

win10下MySQL的后台启动问题

我比较喜欢手动控制MySQL的运行，就用zip安装了MySQL，也没有挂到系统服务上。但是有一个问题，每次MySQL启动都会伴随着一个控制台窗口。即使用start /b或者/min也不行，关闭这个窗口之后服务就会停止。大神有解决办法么，...

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

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1.5k views

1 answer

python - why is fit_transform() not applied to test sets?

from sklearn.preprocessing import StandardScaler sc = StandardScaler() X_train[:, 3:] = sc.fit_transform(X_train[:, 3:]) ... test set and why is it applied only to training set?...

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

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1.4k views

1 answer

有什么开源的协作平台推荐

有没有像飞书之类的开源写作平台？天天写word接口文档，写完邮件每人发一份，飞书在线编辑用的很舒服（虽然也可以用git但是。。）公司没有外网，想在内网部署一个，大佬们有没有推荐的...

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

0 votes

1.6k views

1 answer

reactjs - how to install react-native-video on windows app?

for a certain windows app I am trying to install the react-native-video package on the solution project. I found ... source code "ReactNativeVideoCPP.h" what could be the problem?...

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

0 votes

2.5k views

1 answer

echart dataset 和encode做多条折线

### 怎么通过dataset结合encode,做多条折线,而不是单条单条线想改为多条 const chartOptions = { dataset: { source: { Date:[1,2,3,4,5], Data:[4,5,6,7,8] } }, ... , y: 'Data' }, ### 代码需要怎么改写,感谢各位大佬,不懂得地方太多,虚心请教...

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

0 votes

2.6k views

1 answer

Distinct Values in a PowerApps filter formula

I use some code found in MIKAEL SVENSON blog: https://www.techmikael.com/2019/01/a-no-nonsense-solution-to- ... isn't something I master unfortunately. Thank you for you help...

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

0 votes

2.4k views

1 answer

微信扫描二维码直接跳转到app是否可以实现？

微信扫描二维码直接跳转到app是否可以实现？...

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

0 votes

2.8k views

1 answer

tomcat中如何控制valve的加载？

valve配的redis共享session，想要在redis服务器未启动的时候可以暂时屏蔽掉这个valve不加载，否则启动会报错。有什么办法在不修改配置文件的前提下，给加一个开关项之类的东西？原本是想修改valve代码，传入一个参数来控制，配置用${open}代替，但是不知道怎么阻止RedisSessionManager的注入...

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

0 votes

2.8k views

1 answer

python - determining the period of a number when dividing

So I need to find period of a number when dividing, for example 1/7 = 0.142857142857142857... and print it like 0.( ... period, but only 7 is a period here not 0.78787878787878......

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

0 votes

3.3k views

1 answer

Python No module named 'requests' MacOS

In Pycharm I wrote: import requests url = 'https://www.w3schools.com/python/demopage.php' myobj = {'somekey': ... m pip install requests and also tried this: pip3 install requests...

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

0 votes

3.0k views

1 answer

比较庞大树形结构的数据用什么数据库存储会比较好

比较庞大树形结构的数据用什么数据库存储会比较好,目前是使用关系型数据库使用闭包表的方式存储,但是这样数据量比较大,有其他的方式存储方案吗,使用非关系型数据库?...

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

0 votes

3.3k views

1 answer

vue项目中添加echarts-gl 报错请教怎么解决？

...

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

0 votes

3.4k views

1 answer

vue怎么调用原生安卓的方法？

最近遇到一个需求，vue怎么调用原生安卓的方法？怎么让安卓调用vue的方法？有没有大佬帮忙解答一下...

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

0 votes

3.3k views

1 answer

搭建个人博客的疑问点？

请问一下： 1、文章内容是怎么存储的，具体流程是啥？不会文字全部放在数据表中吧？ 2、一般的个人博客的数据表怎么设计、有知道的大佬辛苦解答一下...

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

0 votes

4.0k views

1 answer

java spring boot把一个类赋值给另一个类的属性，通过属性访问不了方法是怎么回事啊？

然后我控制器定义 @Autowired private DService dservice; 这样使用...

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

0 votes

4.0k views

1 answer

前端地图可视化问题，怎么自定义地图？

前端地图可视化，目前是第三方提供了一个自研的地图底图，我前端需要加载它到浏览器，然后根据后端实时传来的坐标信息，展现出手机地图导航的效果（点根据坐标信息平滑移动）。请问有大佬知道哪些工具库能帮助开发吗，或者提供一些开发思路，小白毫无头绪，不胜感激...

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

0 votes

4.2k views

1 answer

QT点击按钮，在按钮下方紧贴着出现一个表格控件，点击空白处或控件内内容关闭控件

我有两个思路： 1.用菜单，能实现点击空白处或控件内内容关闭控件，但是不满足我需要一个表格型控件的需求 2.生成一个tableview，但是我不知道如何准确的出现在按钮下方，和实现点击空白处或控件内内容关闭控件的功能...

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

0 votes

4.1k views

1 answer

java继承的问题

假设有2个接口 IA(第三方定义的，不能修改) IB(自己写的) 对应的有2个实现 A(第三方定义的，不能修改) B(自己写的) 现在我想写一个类C，拥有A和B的并集方法，怎么写简单...

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

0 votes

4.8k views

1 answer

盒子A中有一个img，当A的宽度大于高度时，img的高度以A的高度为准，当A的宽度小于高度时，img的高度以A的宽度为准

盒子A中有一个img，我的需求是，当A的宽度大于高度时，img的高度以A的高度为准，当A的宽度小于高度时，img的高度以A的宽度为准， css能实现吗？...

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

0 votes

4.3k views

1 answer

flex lexer - why my lexical analyzer can not recognize numbers and ids and operators

my lexical analyzer in flex can not recognize numbers and ids and operators ,only keywords were recognized where is my mistake? this ... ; return(0);} int yywrap(void) { return 1;}...

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

0 votes

4.2k views

1 answer

小程序获取手机号必须是登录状态吗？

京东这个小程序可以直接用手机号登录获取手机号不是要用到sessionKey吗那么游客状态的用户没有sessionKey吧那么怎么获取到的手机号？...

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

0 votes

4.2k views

1 answer

graphql 如何设计rbac？

传统的restful RBAC 设计是通过url作为标记，在请求的时候判断用户角色是否有该标记，那么在graphql RBAC该如何设计呢？...

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

0 votes

4.1k views

1 answer

Firebase reset password link showed me error on the screen

I tried both the custom action URL as well as the default URL *.firebaseapp.com/__/auth/handler, but no luck. Both ... . Where could possibly go wrong? Any help is appreciated ??...

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

0 votes

3.5k views

1 answer

authentication - DJango authenticate function returning wrong?

Using https://docs.djangoproject.com/en/3.2/topics/auth/default/#how-to-log-a-user-in, I've tried to authenticate users on my ... }"/> Sign in with Google </button> </a> </div>...

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

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