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今天在看css-loader源码的时候，看到很多如下形式的函数调用: // 顶部的导入 var _loaderUtils = require("loader-utils"); var _utils = require("./utils"); // ... func)()的方式比用var tmp = obj.func; tmp()更简洁且节省了一个变量 ...

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

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when i open pgAdmin in internet Explorer the following messeges show in internet explorer.plz help me

when i open pgAdmin in internet Explorer the following messeges show in internet explorer....

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

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关于vue-element-admin登陆问题，新人求教

vue-element-admin 如何修改登陆不需要请求后台直接跳转到首页？...

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

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shell - How to run Python command for all folders in a directory

I am new to Linux and I want to execute my Python script on data that is stored in a set of folders. The command ... write the results of my script to the command line/into a file...

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

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JavaScript函数的作用域链是哈希表吗？

ps:作用域链是一个函数被创建的作用域中的对象的集合。图取自《高性能JavaScript》根据这张图以及考虑到JavaScript对象的数据结构是哈希表，所以我觉得作用域链也是一个哈希表，还请指教...

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

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WPF .Net Core 3.1 AddSingleton 作用域无效

### 问题描述在App.xaml.cs中注入了Config类的单个实例, 在MainWindow中对修改了config的属性, 但是在Blaster中config是一个新的实例. ... config; _path = Environment.CurrentDirectory + "\cache.tmp"; ReadData(); }...

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

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python - How to meaningfully use additional properties of an assosiation prox object?

Consider a many-to-many relationship of Things where the order of the children (or parents) matters. So the association ... or is the associaton object useless in # this scenario?...

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

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分布式邮件服务系统如何搭建？

需求：多用户分布式邮件系统，用户可以通过绑定域名进行创建邮件发送服务，通过api、smtp、pop进行调用使用此分布式邮件系统，此分布式邮件系统可以进行相关的邮件分发工作，但不能接收邮件。这样的系统应该怎么做，有没有好的方案，和方向。...

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

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console.log()打印不出来值，不知道是不是异步的问题，已经使用async与await？

console.log()打印不出来值，不知道是不是异步的问题，已经使用async与await...

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

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如何在列表正确使用ChangeNotifierProvider.value保存列表状态，点击列表详情返回的时候状态还在？

场景：订单列表不同状态的切换，由于要共用状态，如果用ChangeNotifierProvider会销毁掉，所以使用的ChangeNotifierProvider.value，因为不会销毁后果：由于列表可以点击查看详情，当返回 ... 所以想知道如何使用ChangeNotifierProvider.value返回的时候还是能显示之前的列表关键代码：...

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

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阿里云oss能否存入图片后自动同步数据库

我在oss客户端拖个文件进去能不能按照我写的逻辑新增一条数据到数据库或者删除文件同时删除数据库内容...

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

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r - Conditional mean statement

I have a dataset named bwght which contains the variable cigs (cigarattes smoked per day) When I calculate the mean of ... But nothing seems to work! Can anyone please help me??...

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

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Java 中关于方法入参 @NotNull() 注释提示

以下是队列使用中的提示以下是队列源码中 idea 提示新手想请教，请问是怎么实现的呢？...

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

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js中多个时间，怎么取最小值

['2020-9-1','2020-9-2','2020-9-3'] 怎么取最小的时间...

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

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Python Django duplicate loop

i fetch two table from my db like this: query_tags = Tags.objects.all() query_usertags = UserNews.objects.all() context ... gonna duplicated cuz of second loop can you help me ?...

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

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snowflake schema - Future data is not yet available for table error when running Create or replace table CLONE

Recently, in the last few days, we're having lot's of errors about "Future data is not yet available for table " when ... what is it referring to and how can we avoid it? Thanks!...

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

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linux内存占用越来越高

mysql占用内存越来越高，但也就16G*34%=5.44G，为什么上面Mem的used达到15G多。请问上面的Mem use、free、buffers和swap怎么解释？现在可用的内存到底剩下多少呢？如果使用了15G，那么被什么进程占用了呢？...

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

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tcp建立完链接后,服务器端断电客户端处于什么情况（或者说状态）?

tcp建立完链接后,服务器端断电客户端处于什么情况?...

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

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218 views

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C++: Creating a C++ vector of a template struct

I have the following struct: template <typename A, typename B> struct Name { }; I am trying to create a vector of ... the struct in my case was initialized. Thanks for your help!...

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

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python - How can I store the number of elements in a tkinter frame as an integer?

I'm trying to write a conditional statement that throws an error to the user if there aren't any widgets in the frame. I ... get the number of widgets in the frame as an int type?...

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

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jsf - can't access to suffixs or enum's values in primefaces <p:selectOneMenu component.. any solution?

Hi I am currently working on a java project (jsf) with primefaces and I am using enum, but I cannot access its ... #{peticion_msg[posibilidad.femKey]}" /> </p:selectOneMenu> ```...

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

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频繁创建销毁线程会消耗哪些资源

如题，频繁创建销毁线程会消耗哪些资源...

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

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新手提问：关于css的一个简单问题

<body> <div style="text-align:center"> <p style="width:50%">hhh</p> </div> </body> 我想要实现p标签相对于div居中且宽度只有div的50%，我这样实现不了，该怎么写呢？...

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

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javascript - use lodash for iterating the array and filter

I have a function called as getFileterMenus = (menus, filterMenu) => { let filteredMenus = _.filter(menus, menu => menu. ... there any other way to do this than using a loop ?...

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

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c# - HiQPdf isn't rendering Chart.js chart on pdf

My organization uses HiQPdf to create PDFs from .Net MVC Razor views. I am wanting to include a chart using the Chart.js library ... : '#000' } }] }, responsive: false } });...

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

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react脚手架构建项目后无法运行

根据官方提供的步骤构建react项目后，执行 npm start 报以下错误根据网上的说法是没有配置环境变量，没有全局安装 react-app，但是在做完这些以后依然报这个错误另：同样的代码，在我公司的电脑上能够顺利start,是装包的时候丢包造成的吗？...

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

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antd-design从上传组件中取到url

在使用antd-design上传组件时，碰到一个问题，表单提交时，该组件的值类似： [ { ????????"uid":"rc-upload-1599658260006-2", ????????"lastModified ... {{ width: '100%' }} />) : (uploadButton)} </Upload> </Form.Item>...

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

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452 views

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【求助】ECharts如何自定义环形图？

问题描述：需求是想要把环形图改成第二张看起来有立体感的效果，怎么样可以实现？尝试过的方法：使用 canvas 自己画，但不能鼠标移入放大图表比例有做过的大佬吗，求助求助当前环形图想要的立体效果...

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

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