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layui前端上传上传jpg就ok,只要上传png服务端就显示『The filetype you are attempting to upload is not allowed.』服务端用的ci3 upload ` public function upload() ... ; echo ('{"code":"0","msg":"ok"}'); } } `...

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

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安装vue-cli4.0时加入typeScript，但是写代码的时候报错了

安装vue-cli4.4.4的时候，问我是否安装ts，我选择了是为了验证能否用ts，我加入了这行代码然后就报错了 <script> export default { data () { return { } }, mounted(){ let ... false;确实是ts的语法 ts目录是vue-cli自动帮我配的，所以这就很奇怪，为什么会报错呢？...

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

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windows subsystem for linux - Jupyter notebook server running but not opening in a browser

I have install miniconda and jupyter on windows through wsl. Although the server starts, i am unable to open the same ... -notebook" whose alias i defined in bashrc. Please help....

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

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react hook 如何使用装饰器？

使用装饰器前: const A = (peops) => {...} export default connect(state => ({ gData: state.gData, }))(A); 使用装饰器后: @connect(state => ({ gData: ... A 使用装饰器后的写法会报错，请问如何修正？如果是 class 组件则正常不报错...

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

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react+echarts formatter添加div点击事件直接调用onclick方法了

哪位大佬知道点击地图的时候为啥直接调onclick方法了...

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

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javascript - Fatal error: Uncaught ArgumentCountError: Too few arguments to function plugin_dir_path(), 0 passed in https://FILE DIR

i need to include a - plugin functions and classes so i can work on it outside the plugin area for example i have a ... passed if you have a fix please let me know (: thanks...

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

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.net - Are there alternatives to DataContractSerializer, for POST marshalling in Web API, that do not impose ordering on XML elements?

I have an existing Web API endpoint that we have, up until now, only supported when accessed via JSON. That is, ... API marshalling that do not impose ordering on the XML elements?...

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

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编译器是如何工作的？

编译和运行期的加载是两回事：加载是加载二进制格式到不同的内存里编译器简单来说就是读入字节流处理后输出字节流的程序从读入字节流变换到输出字节流的过程，这块的过程是什么知识点？在编译原理书中只能看到编译器程序工作后的结果，将输入 ... 释器最终得到机器码才能在硬件上工作但是编译器本身是一个由算法和数据结构组成的程序，它怎么实现翻译高级语言的动作呢？...

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

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SectionList 触发了 onScrollToIndexFailed 如何优化？

调用了 SectionList 的 scrollToLocation 触发 onScrollToIndexFailed 查看文档： https://reactnative.cn/docs/v... 用来处理滚动到尚未渲染的索引导致滚动失败时的回调 ... 试可是 SectionList 并没有 scrollToIndex 方法啊，如何滚动到相应位置??...

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

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Typescript - Dynamic key names in object? Using template literal?

Is something like the following possible? type test = <T extends string>(key: T, object: { [`${T}`]: number }) ... keys using as is possible... Anybody have any insight into this?...

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

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677 views

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echarts柱状图选中颜色循环

echarts的选中效果做出来了，需求是最多只能选中五个，选中第六个的时候第一个自动取消选中颜色也是五个颜色循环求求求求求求求求求！选中代码如图，第一个点击事件是echarts的，第二个是option里的series设置选中颜色的最多五个 ... ,4] 取消选中了下标为[0,2,3]的柱子再次点击其他柱子时变成[1,4,0,2,3] 筛选不出来...

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

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javascript - How to change the next page's heading according to the previous one?

I have two HTML pages: on the first one, I have 3 tables with people's names and last names. On the second page, there is one ... <tr> <td class="lastName">333</td> </tr> </table>...

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

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pipe - Interprocess communication between c code and python

I am trying to plot data related to CPU usage and memory usage in real time on graph. I am reading data using a c code and ... { printf("Write error "); return 1; } close(fd); }...

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

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一个大型的服务器集群难道只有一个leader服务器么？

最近学了主从模式，一个集群只能有一个leader。那么问题来了，像大公司成千上万台服务器，它们组成一个集群，难道只有一个leader么？这个压力能顶住么？...

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

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Cannot get the correct corresponding results in python

I'm trying to create a ranking for string answers and create frequency distribution with the ranking (and use it for data ... 14 509 15 247 16 83 Name: education, dtype: int64...

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

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250 views

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react组件里如何获取window对象？

我想在index.html文件里手动设置一些文案变量 <script> (function(){ window.App = { TITLE = '测试' } })() </script> 我在react组件通过点击某个按钮console.log(window.App.TITLE),提示TITLE未定义。如何在index.html设置window变量呢？...

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

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342 views

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js替换数组中的某个键值对

var arr = [ { "fdId": "1ech3enh02snwcw1q9fd0q2jv026k1hb", "actionType": "agree", "triggerTime": 48, }, { "fdId": "1ecp2el9j35ow2dw34t42dd1klcdea1s ... } ] 生成一个新数组，把fdId替换成id 应该怎么转换...

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

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vue-router不显示

router-view空白，同样的结构在我的其他项目里都没问题，不知道这里为什么不能显示目录结构如下 main.js import Vue from 'vue' import App from './home. ... default { name: "home", }; </script> <style lang="scss"> </style>...

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

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536 views

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nginx index.html is not found (2: No such file or directory)"

访问首页404 这个是nginx.conf的配置这个是服务器对应的文件...

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

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python - Pyserial difference between shell and script

I am writing a set of interface python classes to command several devices via serial communication. In this case I am ... familiar with. Does anyone know how to fix the problem ?...

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

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175 views

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Python requests.get does not take field names for data

I need to generate data using the below url via requests.get : fields = ("") response_2 = requests.get(BASEURL + ' ... : Invalid fields argument What is the best way to fix this?...

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

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dart - How to connect API in infinite_view_pager widget - flutter

I want to get data from API. I have no idea how to connect it.. I am for a beginner for this. this is the widget documentation ... }); }else{ pnews = []; isLoading = false; } } }...

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

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lottie-web的图片要放在哪里才能被json读取到？

背景使用lottie动画的时候json文件读取不到图片的地址而且查阅了很多资料都没有找到解决方案 assetsPath写绝对路径没什么效果但是需要使用本地的资源 images文件夹放在根目录没什么用默认读取是从根目录直接读图片但是不 ... web端怎么才能设置制定图片资源目录啊官方文档只有这么几个属性，也没有关于资源目录设置的求大神指点orz...

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

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js some() 是同步方法吗?

some遍历数组的时候,符合某个条件跳出循环,并返回值如果不符合在递归调用 recursionModel(parentModel, selectMesh) { let flag = false console.log(1) parentModel. ... flag) return flag 但是结果返回的是false 不知道什么原因导致的,求解??...

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

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474 views

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javascript - window.settimeout functionality not working properly in ios safari and android browsers

In our application, we are using the popup to show session expiration after 1 hour. Below is the code snippet. var ... transaction is going to fail. How could we fix the problem?...

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

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tensorflow - Keras Data Augmentation with ImageDataGenerator (Your input ran out of data)

I am currently learning how to perform data augmentation with Keras ImageDataGenerator from "Deep ... epochs=100, validation_data=validation_generator, validation_steps=50)...

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

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react-bootstrap Glyphicon的Arrow-left图标还有其他地方有吗

就是这个图标要免费的...

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

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462 views

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使用VS Build一个.netcore的项目时每次都会重新生成DLL是否正常?

如题, 用以下的输出日志举例, 我用VS2019的asp.net core的空模板生成了一个web项目, 在每次我对项目 "build" 的时候, 就算我对代码没有做任何改动, 每次项目还是会重新output一次 ... ==== Build: 1 succeeded, 0 failed, 0 up-to-date, 0 skipped ==========...

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

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