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子组件emit出来的事件带有1到2个参数，在父组件中怎么传递其他参数，且保留子组件的参数，记得有2中方式，求教子组件 this.$emit('submit', arg1, arg2) 父组件 ... @submit='doSomething'>确定</some-cmp> doSomething后面怎么传参，除了接收arg1 arg2，再添加一个arg3...

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

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762 views

1 answer

ios - WKWebView full screen with hidesBarsOnSwipe of navigation bar

I want to make a custom browser working with ARKit in background. I set UINavigationController as rootViewController and ... . And home indicator does not occupy any area....

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

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832 views

1 answer

javascript - Is it possible to get the value from an input field that has been added via a button?

So I am creating a web application that allows a user to create a poll/quiz/survey etc. In the create page, I have ... Input</button> </div> ); } } export default MultipleChoice;...

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

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1.2k views

1 answer

将一段html页面中的代码内容存入数据库，希望从数据库提取数据后，可以变成我想要的样子

<br/>import fs from 'fs'<br/>import {default as fs} from 'fs'<br/>import * as  ... fs, {readFile} from 'fs' </pre></code>...

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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1.7k views

1 answer

directx 12 - DirectX12 rendering to part of the window

I am trying to have the DirectX12 pipeline render to only part of the window, not the full window. Is ... the window? I must be missing something about CreateRenderTargetView()...

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

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1.4k views

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java 爬虫发送请求

HttpGet httpGet = new HttpGet(url); httpGet.setHeader("User-Agent", "Mozilla/5.0(Windows NT 6.1;Win64; x64; rv:50.0) Gecko/20100101 Firefox/50. ... 这是不是太麻烦很多重合代码？因为一个网站可能很多url来回跳转...

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

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1.8k views

1 answer

el-calendar如何切换渲染指定月份？

为了实现类似这样，点击上边日期选择后切换到对应的月份，求教...

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

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2.0k views

1 answer

JS 一个变量名可以用变量来表示吗?

var a1 = 1; var a2 = 2; var a3 = 3; var a4 = 4; 如此类推，直到99。。这样一个个定义有点累人，有偷懒的写法吗？自己试写了下，报错了~~怎么解决呢！ for(var i = 1;i<99;i++){ console.log(i); var ['a' + i] = i; } console.log(a8);...

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

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2.1k views

1 answer

js 实现向树结构添加节点

`如下数据： data = [ { id: 1, date: '2016-05-02', name: '王小虎', address: '上海市普陀区金沙江路 1518 弄' }, { id: 2, date: '2016-05- ... 的数据]，再次添加我就push，如果我下次给children里面的元素添加节点，就继续创建children，以此类推 `...

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

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2.6k views

1 answer

如何让多个对象相同的属性值相加

var data = [ { typeId: '2', name: 'potato', number: 16 }, { typeId: '3', name: 'potato', number: 10 }, { typeId: '4', name: ' ... number 合并，得到一个新的对象,从而返回一个新数组 arr，有哪些比较好的方法？...

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

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2.8k views

1 answer

请教怎么把表2某列的值加到表1相应列上

比如我在DolphinDB中有下面2张表： code=`A`B`C`D`E totalValue=10 20 30 40 50 t1=keyedTable(`code,code,totalValue) t2 = table ... code的totalValue上,使得 totalValue = totalValue + t2.value，这个应该怎么处理？...

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

0 votes

3.2k views

1 answer

小程序上放大缩小图片图片上的热区跟随变动

有个需求在移动端显示一张手绘地图可以放大缩小地图上有几个固定的地点可以点击如何做到放大缩小的时候热区跟着变动...

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

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4.0k views

1 answer

excel - How to remove read-only when file gets saved?

How to remove read-only flag when file gets saved? Because the file I work in to run this code is ... & "Yes" ActiveWorkbook.SaveAs Filename:=fname, FileFormat:=xlOpenXMLWorkbook...

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

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3.7k views

1 answer

easyUI 表格可编辑列的问题

<table id="dg"></table> $('#dg') .datagrid( { url : '${pageContext.request.contextPath}/purchase/msWarehouseReceiptDetails/findDeails', queryParams : ... ，是哪儿写错了先感谢各位大神们的解答，小弟感激不尽...

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

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4.3k views

1 answer

How To Convert .ttf & .otf font format to .woff Python

I am developing a functionality where user uploads any font , but that should be converted to .woff format only. i went ... sounds too complicated. Any ideas on how to do it ?...

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

0 votes

4.1k views

1 answer

tomcat - Removing specific algorithms from Java security providers

I have a tomcat 7.x servlet container which deploys multiple war files from its webapps directory. I would like to ... since I removed MessageDigest.MD5. What could be the reason?...

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

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4.1k views

1 answer

javascript - Splitting my Webpack bundle is causing JS issues

I'm using Webpack in a fairly simple, straightforward way that bundles together a few JS and TS files into one ... smaller bundles, and make sure that all bundles work correctly?...

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

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4.1k views

1 answer

vue项目打包

vue项目打包的时候，发现配置的是如下命令： "build:work": "vue-cli-service build --mode work", "build:ut": "vue-cli-service build --mode ut" ... 'unambiguous' //目的是让babel明确区分ES6导入导出方式与common.js导入导出方式 }...

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

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4.5k views

1 answer

如何使用mongodb去实现一个递归累加的效果

假如现在的数据库是这样的 [{ datetime: '2020-11-01', statu: '运作', count: 20 }, { datetime: '2020-11-01', statu: '关闭', count: 20 }] 这是在固定 ... 常复杂拜托对mongodb熟悉的大佬，希望能给点思路，或者说mongodb有方法能使这个过程相对简洁些...

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

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4.2k views

1 answer

android - Is there any way to stretch layout when device has cutout (notch)?

I'm making my project able to handle notch/cutout because users can see big black rectangle area when in ... any special layout views which can handle notch/cutout stretching?...

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

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4.4k views

1 answer

想问一下，自己前端，刚入职公司半个月，本来公司还有人带，可是那个人就要离职走了，

自己平时项目添加功能都没问题，就是做的比较慢，想问一下前辈们，怎么能尽快熟悉公司项目，并且怎么才能提高自己呢？因为公司只有我这一个前端，公司平常主要做react,react-native...

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

0 votes

4.4k views

1 answer

uniapp movable-area 双指放大后离开屏幕后再双指缩小就不行了

<movable-area scale-area class="movable-area"> <movable-view class="movable-view" direction="all" @scale="onScale" scale="true" scale-min="1" ... @scale 这个事件也不执行了有遇见过这个问题的伙伴吗 ...

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

0 votes

4.0k views

1 answer

iview如何实现图片上传

iview如何实现图片上传带回显的功能有没有一个可用的demo...

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

0 votes

4.1k views

1 answer

android 的神秘内存泄露

下面这种内存泄露如何分析呢？求大神告知 ┬─── 2020-12-28 14:06:45.065 19720-26550/com.clean.apple.app ... instance of androidx.appcompat.view.ContextThemeWrapper, not wrapping known Android context...

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

0 votes

4.3k views

1 answer

vue页面如何将多个method抽离成单独的文件，然后像js使用全局变量/函数那样能操作引用页的data？

我有1个组件文件，包含了5000+行method，因为只有这个页使用这些方法，我想把这个文件的method按功能拆分为多个文件，引入后又能像在本页内一样使用data，操作页面，我尝试了mixins和extends属性，但是都达不到想要的效果...

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

0 votes

3.9k views

1 answer

关于js二叉树遍历的问题？

class TreeNode { constructor(val) { this.val = val; this.left = this.right = null; } } function init(){ var root = new TreeNode(5) var node1 = ... ], ] 即按照分支左右分支遍历（描述可能有问题，大概是这个意思）...

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

0 votes

3.8k views

1 answer

vue项目打开打印机后 element-input 无法输入

我在 A页面中点击打印按钮执行 window.open(href, '_blank');//href 是后端返回的一个接口地址此时打开 B窗口打印页面调用的是 window.print() 此时我直接点击浏览器 x 按 ... input 无法输入(无法聚焦) 框架用的是 element-ui 求大佬指点(mac 系统没问题 windows 必现)...

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

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