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    1.为啥要先判断obj!=null 2.为什么要obj===obj.window; 而不是ojb===window; 我这样写不也可以判断 isWindow:function(obj){ return obj===window; }...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I looked at a few results for how to do the task in the title. One of the most popular is an SOF ... those instructions. However there is no "compare versions" option afaict:...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I like to implement the functionality where if two users are trying to login with the same credentials then the first user ... sessionId), but is it not log out the specific user....
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I am creating a Discord Server Bot and when I build and execute jar file it says Error C:Users[user.name] ... ------- C:Users[user.name]IdeaProjectsJava-Discord-Bot>...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    为什么同样都是inline-block的两个元素(天蓝色的div块和文本的div),在一行上位置不在一个水平线上?位置高低差这么多?望指教! html,body{ margin:0; padding:0; } . ... </div> <div class="title-content">开始<div> <div> <div> <div> <body>...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    运算器和控制器都有寄存器是吗? 我在看一篇文章时候: 冯诺依曼结构中: 运算器组成: ?CPU内部的算术逻辑单元及相应的寄存器, 同时还保存反映运算结果的状态。 控制器组成: 指令寄存器、程序指令寄存器、指令译码部件、控制电路。 也就是说: 运算器和控制器都有自己的寄存器,是这个意思吗?...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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1 answer
    This issue is hard to explain, so I'm going to do my best. I have this webapp which was built on Laravel with ... real iPads and can be reproduced on a simulator Laravel v8.0...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    在scss中使用引入本地图片做背景,但是在浏览器中编译却显示为 [object Module] 图片路径是没问题的,有大神可以帮忙解决一下吗 'use strict' const ... 5, reuseExistingChunk: true } } }) config.optimization.runtimeChunk('single') } ) } }...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    跪求大神解惑,按照官网环境搭建的,可是项目跑不起来: 已安装的环境: 系统变量: 可以找到android studio模拟器: react-native run-android运行报错:...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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386 views
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    <launch> <node pkg="test1" type="test1" name="test1"/> </launch> Error: [ROS_NODE_NAME-2] process has died [pid ... using ROS moelodic. Any ideas please how it can be solved?!...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    我想写一个类似于这个线上展馆一样的页面: 我目前实现了房间场景的搭建: 四面是围墙,中间也是几面墙 很粗燥,大牛们别介意, 现在的问题是,怎么让图画出现自动出现在紧贴墙壁的位置?? 我自己所能掌握的知识就是一个一个的确定每一个画框的三维位置,把所有三维位置写成一个数组,再通过数组进行循环创建, 大佬们有没有什么好的方法???...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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1.2k views
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    就是功能是一个modal header是title+一个select 会根据你的select,modal-content展示不同的页面,但是没找到这样的demo,官网也看了文档没找到答案,求大神解解惑,谢谢大家...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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546 views
1 answer
    I would like to create a constexpr std::array<std::string_view, ConstexprNumber>. It should for example contain ... ? Either based on this initial solution or something similar?...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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515 views
1 answer
    用Python进行七牛多文件处理(mkzip),一直报404的错,索引文件没有问题,可以访问,索引文件内的图片地址也是可以访问的 ... /url/aHR0cHM6Ly9oZXJhcy5pZ2VuZ21laS5jb20vMjAyMC8wNy8yNC9kOWQ0ZjIzNGE1 确定空间名没有问题, 尝试加管道也没用...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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821 views
1 answer
    最近接手了一个react的项目,但是之前代码格式化做的不好,自己打算用 prettier + eslint 重新对代码进行格式化,但是目前能做的只有保存的时候自动格式化,一次只能处理一个文件,请问有没有一种办法可以一次将所有的 jsx 文件进行格式化?...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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502 views
1 answer
    我想要的效果比如路由 { path:'/apps/:app', name:'Daily', component: ()=>import('../views/Apps') } 然后我在view/apps目录下有不同的页 ... 路由 地址访问 http:/localhost:8080/#/apps/project 即是apps/Project.vue显示的内容...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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454 views
1 answer
    We have a shopify embedded public app(An embedded app is rendered inside iframe) created using node , next js and ... the gtag.js implementation and the below is the code snippet:...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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516 views
1 answer
    我们业务中有一个 DB,慢慢到了千万级别,而且有不少比较复杂的联表查询,导致性能慢慢成为瓶颈,因此分库分表被提上议程 基于我们的业务属性,这个表的每一行数据有两个可以用于分表的属性,这两个属性,相当于 大类 和 小类 ... 是有限的 请问各位,其他还有写什么问题吗?此外,是否有对于大量分库分表的一些分析测试数据呢?Leader 的方案是否可行呢?...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I have a class "DependencyResolver" where I return instances of objects by hand. There I used "Activator.CreateInstance". ... way to change the behavior when "CreateNew" is called?...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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123 views
1 answer
    I have some legacy code written in cilk++ and I am looking for a way to compile it. I have looked all over ... . The closest I found is sourceforge project that fails to build....
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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195 views
1 answer
    I want to get all records from database to my crystal report. but I only get the first row. ... reportDocument.SetDataSource(dt); crvInvoiceReport.ReportSource = reportDocument; }...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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382 views
1 answer
    vscode调试vue项目 好像不成功 点击按钮之后就报 Configured debug type chrome is not supported 大哥们看看什么情况...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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289 views
1 answer
    初学python没多久,碰到了一些分组的问题, 我的数据大致如下 第一列的话是交易的原始数据,我截了一点数据出来,其他的都是统计数据什么的,我根据时间列出了每天的星期,week栏0是星期一 1是星期二 我想根据week进行分组,每 ... 完整的周一到周五,就可能比较麻烦,另外这是十年的数据,用excel做不是很现实,想问问怎么用python去实现呢?谢谢!...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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150 views
1 answer
    网上看到了两个版本: 1.父类和子类的函数名字相同,那就是隐藏 2.父类和子类的函数名字相同,参数相同的,如果是虚函数,那么就是覆盖,否则就是隐藏;参数列表不同的,都是隐藏 求教那种是正确,个人偏向第二种...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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201 views
1 answer
    看了一下react源码,react只定义了两个变量 var requestAnimationFrame = window.requestAnimationFrame; var cancelAnimationFrame = window. ... 个api在react是怎么被使用的,MessageChannel和它有关系么...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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280 views
1 answer
    I want to run ps command programmatically in android. I am trying to run command using Process p = Runtime.getRuntime ... in android device I am not getting root/system processes....
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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223 views
1 answer
    在 react-native 里, 可以通过 package.json 的 scripts 来自定义命令行 请问同样的效果,在 flutter 里如何定义呢? 我想实现运行 flutter clean android 执行命令行 cd android && .\gradlew clean && cd .....
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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488 views
1 answer
    nodejs是单线程,当代码中出现错误的时候,服务就挂了。 当然相应的,有守护进程这种东西,在他挂了的时候能自动重启。 但是,如果node服务上的报错触发方式被别人知道了。 然后在执行业务逻辑的时候故意触发这个报错,可能会导致业务错乱,虽然有数据库事务,但是终究问题还是存在。 应该如何避免代码的错误导致node服务频繁重启?...
asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)
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