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如下demo，可以默认勾选到想要的数据，但问题是如果datas一开始为空，则无法勾选到默认的选项，请问，需要作什么处理？或者使用其它的方法？ <div id="app"> <el ... , mounted() { this.$refs.table.toggleRowSelection(this.datas[2]); }, }).$mount('#app')...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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微信小程序有没有和Vue一样的子模板向父模板传值的方式？

Vue的子组件可以使用 this.$emit('value',{ value:this.value, }); 的方式进行向父组件传值，父组件可以使用 v-on:value="func" 的方式进行监听并接收传递过来的值。那么在微信小程序中有没有什么可替代的传值方式呢？...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Kivy to print changing variables

There's a project I am working on and I am using kivy. I receive some input and that input gets stored in a variable ... for kivy is pretty standard. The kivy file is what I need....

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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scichart - flippedCoordinates rotated chart pointMarker showing wrong place

enter image description here Points are not plotted correct on the scichart xAxis.axisAlignment = EAxisAlignment.Left; xAxis. ... "blue", strokeThickness: 1, }); });...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Cuda debugging using Single GPU with visual studio

I am working on Windows 7, Visual studio 2010. Can we debug cuda code using single GPU which also providing display to ... are available ? NSIGHT seems to be working with two GPUs....

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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UICollectionView 如何闪烁？

我有一个 CollectionView 里面有 49 个 Cells 如果我想通过程序使最后某一个 Cell 闪烁（或者变色都可以，只为了突出一下），该如何做呢？不能使用selected等响应用户的方法。...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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安装完php7运行phpinfo还是出现之前已安装的旧版本

win安装完php7.1 配置好nginx 运行phpinfo 还是出现旧版本因为之前用过xampp 没有卸载掉是不是这个原因？ win下安装php7教程是在网上搜的应该没错把...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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使用gradle如何替换一个zip文件中某文件的一段内容

如有一个a.zip,该zip中有一个temp.txt文件,其中内容为aaa=123 我想把aaa替换为bbb,使用gradle要怎么写...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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guzzlehttp/guzzle 错误

Fatal error: Uncaught GuzzleHttpExceptionRequestException: cURL error 51: gnutls_handshake() warning: The server name sent was not recognized (see ... -dev 在重新编译安装php curl 库完美解决...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Qml无法显示效果

import QtQuick 2.2 import QtQuick.Window 2.2 import QtQuick.Controls 1.4 import QtQuick .Controls.Styles 1.4 Rectangle{ width: 480; ... 为根对象运行时什么都没有，当我把Rectangle换成Window才有效果?...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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laravel eloquent 模型能否注册服务提供者

如图，我在service中注册了User模型，但是在使用的时候调出来数据是空模型。请问eloquent 模型能否注册服务提供者有没有什么解决方案？...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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amazon rds aurora - how does AWS DMS validates source and target data?

Curious to know how does AWS DMS validates that both source and target databases are in-sync, does it validate ... the validation time it takes to complete the validation task?...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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330 views

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html - SVG shapes with feGaussianBlur stdDeviation not rendering correctly on google chrome

So I am using an SVG mask on an image to make a blurry edged ellipse and for a while it was looking right on all ... { float: right; } </script> SVG in Firefox SVG in Chrome...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - How do I clear a leaflet map in react so I can map fresh data?

I am attempting to clear a leaflet map in react when fetching new data to map, and i am unsure how to approach this. I ... .io/s/leaflet-test-forked-8hm3i?file=/src/Leaf.js:550-573...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Jackson exception handling - How to get all unmapped fields

The question is about correct handling of type miss matching in the json input. So, I have simple class class Entity { ... an exception with all these errors at the end of parsing....

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How to convert matplotlib.pyplot.contour to RGBA list or array?

I am trying to convert the information from a contour plot into an array or list in RGBA so that I can combine ... to save the dummy file. Any help would be greatly appreciated....

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Pandas, group dataframe and normalize values in each group

I have a csv file with different groups identified by an ID, something like: ID,X aaa,3 aaa,5 aaa,4 bbb,50 bbb,54 ... 'mean = {mean_x_group}') but how do I add the third column?...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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605 views

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js 异步的问题，settimeout的问题

var?i?=?0,?timer,?j?=?0; while(i++?<?5)?{ ??timer?=?window.setTimeout(function(){ ????j++; ????alert(j); ??},?1000); } clearTimeout( ... ); 这个时候，他是同时输出的，为什么跟上面用i的不一样？谢谢各位的回答哈 ...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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tomcat服务启动后，怎么清楚浏览器缓存

Tomcat服务启动后，由于浏览器缓存，造成了js 和css不能实时刷新过来，有什么办法在客户登录发送请求的时候，将浏览器缓存清理一次...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sympy - Solve non linear equation with one variable Python

I am trying to solve the following equation in python with sympy. 13000*1.44**x =1000000 I tried: x = symbols(' ... solveset? Do I need to solve this with fsolve? Thanks in advance...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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video标签无法识别的视频格式怎么办？

video只能识别三种格式，IOS手机录的视频是MOV格式，怎么办第一张是在开发者平台上测试的，第二张是在手机上显示的，有那个灰色的模块表示有东西...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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315 views

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Automaticaly positioning rectangles estheticaly on a canvas with D3.js

I want to code a visualazation that places rectangles on a screen, in a way that is estheticaly pleasing, according to ... Which D3 method would be the best for doing this ?...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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动态表单应该如何设计数据库？

需求是这样的在后台管理界面录入表单信息，规定有哪些表单 (可以增删) 在前端显示哪些表单的可以填写最后把填写的表单(产生的真实数据)存入数据库最后填入的数据需要能够方便查询，排序，过滤的数据我在网上找了挺多资料都不太符合我的需求。有没有设计大神提供一下设计的思路！！！...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Decrease counter based on html element

I passed a integer variable as a context when i rendered a webpage. That variable is the initial number of untagged ... of untagged images counter whenever i fill in an empty tag?...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Reason after blacklisting command Discord.js

I want to add a reason to my blacklists (with the command !blacklist {userid} {reason}) which are visible in the embeds below like . ... .send(embed); } catch (e) { return; } }); }...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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458 views

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vuejs + element-ui, 后台数据绑定select的option选项

使用vuejs+element-ui的时候遇到了一个问题现在有一个page.vue的页面 data() { return { searchFormConfig: { formItems: [{ ... return this.initialSearchFormConfig; } }, created() { this.getCities(); }...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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How to embed images from MatPlotlib to Discord.py using Embed set_image without storing the image?

I'm creating a bot via DiscordPy where when a user writes !unemployment, the bot makes a server call to U.S. Bureau ... values in the format of data:image/png;base64,<BASE64 code>....

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Can't update single package with go modules

I have 2 projects with go.mod in root directory. One is https://github.com/Gohryt/Impossible.go Next one is ... name version with latest, but go mod tidy did nothing again....

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

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