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elementui国际化定义的中英文js文件可以在组件中按需引入吗

elementui国际化定义的中英文js文件可以在组件中按需引入吗？就跟引入组件一样...

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

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ts 定义一个num：number 但是 num默认值不想写数字怎么破

ts 定义一个num：number 但是 num默认值不想写数字并且if判断的时候偶默认值还是false 怎么破写null和undefined都报错...

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

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ios - Weird libobjc.a.dylib objc_msgsend crash

Search anywhere and could not found an answer. I have this issue causing the app to crash on many users. ... AppNotificationManager.swift:19) 11 libdyld.dylib 0x19c5556c0 start + 4...

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

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on('click',func) 和 $(document).on('click','.smt',func)?

自学小白想问一下两者的分别 $('.stm').on('click',function(){ }); $(document).on('click','.stm',function(){ });...

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

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javascript - ToggleClass and SlideToggle with Class Selector

I have a problem regarding the class selector. I have this hamburger menu that is only shown in certain window size (small). In order ... assessments</li> </ul> </li> </ul> </nav>...

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

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csv - Save response data along with other label using Simple Data Writer

Is it possible to store response data along with other details , reason I need to check for requst which as taken long ... lister , view tree , but that does not solve the purpose...

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

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为何有些人不喜欢使用 SQL 方言?

为何有些人不喜欢使用 SQL 方言? 尤其是喜欢用 ORM 的后端工程师像是 oracle 的 pl/sql,sql server 的 t-sql 最近看一个新同事的code (有3年资历) 明明可以使用 t-sql 设定变数的方式,一个 sql ... 过度设计" 了并且个数据库厂商提供的方言,很多时候可以提供更高速度方便的工具 "不应该不使用"...

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

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vue.js - Nuxt - How to call a getters in a global mixins?

Hi everyone here is the mixin code I wrote as I want to use this for default.vue and error.vue layout. I am ... Cannot read property 'length' of undefined What am I doing wrong?...

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

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前端如何处理bigint

除了axios里用 axios.defaults.transformResponse = [function (data) {}] 原生ajax和fetch要怎么使用呢？...

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

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求解：$refs打印v-for循环出的数据为undefined。

我的目的是搜索名字出来给它这个列表加标识加图标，但是获取dom这部就失败了 <div class="home"> <input type="text" v-model="names" /> ... search()?{ await this.$nextTick(); console.log(this.$refs.list.innerText) }, },...

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

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koa 请求路由的时候捕获请求的方式？

如题：场景1：/getUser 接口请求的方式：post 但是用 get请求的时候直接 Not Found 有没有好的方法、方式可以捕获到然后提示请求方式的问题？...

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

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r - aggregate rows in a plot

I have a seuratObject, rownames are gene names, not unique in the list, colnames are sample ids. counts <- GetAssayData( ... this to the plot. Does anyone know how to achieve this?...

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

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c - why does the result of loading binary between on linux and on arm are so different?

In essence, I want my main program to link properly to one library 'libA.so', and the symbols 'subFunc' from that ... : _Z7subfuncii Any advices for me, I will be very grateful....

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

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dart - FAILURE: Build failed with an exception. But no indication which package could be causing the error. Using Flutter in Android Studio

I recently upgraded both Dart and Flutter via Android Studio and different issues started creeping out. I eventually updated the ... .1.3 video_player: ^1.0.0 Thanks in advance....

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

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windows 环境下 shell脚本如何获取时间？

现在公司让做备份，备份的服务器是windows server 2012 的现在文件也获取了，就是名字需要改成数据库-2020-9-8-14-21-33.tar.gz' 但是windows下怎么也获取不到时间，我在git 的bash 上 ... 件执行了以后，文件名称也没有变化有没有大佬知道怎么在windows的shell脚本里获取时间？？？~~...

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

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element-ui表单组件名称为npm时出现问题

问题描述： npm 在element-ui表单组件中是不是保留的关键字，当el-input 双向绑定的名称为npm时，出现问题： 1 input框无法输入内容，使用 @input="change($event)" change方法中使用this. ... 校验方法中输出表单数据，npm的值是存在的；将npm更换为其他名称，则可以正常输入和校验；...

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

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python - wondering how the function work step by step

def main(): move_discs(3,1,3,2) def move_discs(num, from_peg, to_peg, temp_peg): if num > 0: move_discs(num- ... function is just displaying a solution for the Tower of Hanoi game....

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

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jquery - Replacing text on div

I have a form that if I select certain values from a <select> and <input>, the jquery goes in action. I have the ... My jquery/js skills aren't really the best. Regards and Thanks!...

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

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javascript - analyses fonts for their language php

Have a nice day. I need to determine which languages ??the font (ttf) supports. Now using php I can get different ... likely, I cannot consider another way out and ask for help....

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

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typescript - If condition in Angular material table

I am using Angular material table and I want to hide a column in table on the basis of if-condition. If the condition ... ','delete']; I tried but failed can anyone help me?...

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

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javascript - How does the "this" keyword work?

I have noticed that there doesn't appear to be a clear explanation of what the this keyword is and how it is correctly ... occurred. How does this work and when should it be used?...

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

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python 3.x - How to get over a OpenModelica solver failure?

Running the simulation from OMedit works just fine. But, when I export the model as FMU to a python script thru the ... as FMU using the Dassl solver. Could anyone help me?...

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

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next.js getServerSideProps 修改redux 组件没有更新

page/index.js export const getStaticProps = wrapper.getStaticProps(async ({ store }) => { store.dispatch(serverRenderClock(true)) store.dispatch( ... 请求，那么count应该加了1，为什么页面显示还是0呢？...

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

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Javascript date regex DD/MM/YYYY

I know there are a lot of regex threads out there by I need a specific pattern I couldn't fin anywhere This regex validates ... regex and how do I escape it? :P Thanks a lot...

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

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关于node文档处理的问题？

问题前端上传文档比如word，后台node接收时，如何将这些文档，转换为图片返回给前端，类似一个预览的功能能提供个思路吗？或者有相关插件吗？...

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

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excel - VBA defined function not accepting more than one variable

My VBA Function is not accepting two variables for a basic function. It keeps giving a #VALUE! error. Function myFunction(x ... Function I am using Windows 10 Pro on a Lenovo Yoga....

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

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使用vue-router的addRoutes动态添加路由不生效？？

前端实现路由权限控制，根据不同的角色使用不同的路由，我现在在main.js里使用addRoutes的方法添加角色对应的路由 `new Vue({ el: '#app', router, store, template: '<App/>', components: ... 是页面依然能跳转之前路由，所以想问下既然已经替换更新了路由为什么还能访问之前的路由呢？...

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

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471 views

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求助，帮忙看一下这个段SQL语句中max()函数的作用是什么

书中的例子，数据库如图，需求是：查询只加入一个社团的学生的社团ID和加入多个社团的学生的社团主ID，Y为社团主ID，书中给出的代码是： SELECT std_id, CASE WHEN COUNT(*) ... GROUP BY std_id; 请问MAX(CASE WHEN main_club_flg = 'Y'这句话中MAX()函数的作用是？...

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

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