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I've been trying to get this to work, but with no success. I get this error: type '_HandleErrorStream<dynamic>' is not a subtype of type ... "Food Name: $food"), ], ); }, ), ); } }...

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

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vue使用layer页面弹窗，元素被遮罩遮挡怎么解决

在vue页面重写了一些元素，然后通过 layer.open({ type: 1, content:$('#id'), }); 打开，但是元素被遮罩遮挡。官方推荐写在body根目录，但是vue不可能去改index.html文件的，都是写在组件里，怎么解决这个问题...

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

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使用v-for 循环渲染表单

使用v-for 循环渲染表单，但是由于不同的item中的表单数不一样导致，在前面的表单被渲染到后面了，怎么样才能做到按顺序渲染表单呢？ ` <div ... " @SubmitFormCallback="handleSave" @changeSelect="hanleChange"> </createDataForm> </el-row> </div> `...

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

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element table 中选定某个单元格下方的所有列

element table 中选定某个单元格下方的所有列添加背景色，类似excel中选中某列后添加此列的背景色。目前已经获取到了单元的行列值，怎么选中下方的所有列添加背景色。...

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

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dynamic programming - Knapsack Problem: Difference between the two loops

Although these are two different questions, I wish to know the difference between these two loops. What is the difference between ... ]] + val[j]); 0-1 Knapsack Fractional Knapsack...

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

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C++ 如何从将遍历带中文的字符串呢？

我现在需要从一个 utf-8 文件中读取文本内容，然后将文件内容读入到 std::string中但是由于 u8 中文字符的长度是不定的，处理起来相当麻烦，而且还要区分带 bom 的和不带 bom 的文件请问也没有更简 ... } } 附带一些有关链接 unicode编码中一个汉字占几个字节？汉字 Unicode 编码范围 C++输出中文字符(转)...

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

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ssl - Java not using truststore

I am creating a HTTPS client for a REST API in java and there are some issues ... connection like: HttpsURLConnection.setDefaultSSLSocketFactory(sslContext.getSocketFactory());...

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

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关于正则表达式匹配问题

let re = /.?(?!@)/i; let str = ".@"; console.log(re.test(str)); 这个为什么返回true呢，求解释...

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

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Vue cli4.0 使用mockjs+axios模拟数据拿不到数据返回404

我在src目录下新建了mock文件夹，并在其下创建一个api.js文件，如图： api.js代码如下：拦截ajax请求我用的是Mock.mock( rurl, rtype, template )这样的写法，然后我在main.js里设置了一个mock开关 ... 报错，但是被axios的拦截器接口错误拦截了，返回了用户名为空的情况，请各位大哥帮帮忙，多谢了...

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

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python - Issue with training an Image Classification Model with Tensorflow Lite Model Maker

So I'm new at ML and I have a task where I need to be able to identify a specific object with my phone' ... . Any insights you guys may have or clues are greatly appreciated Cheers...

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

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使用编辑器编辑文件后再使用Git推送时，Git提示 warning: LF will be replaced by CRLF

Git提示： warning: LF will be replaced by CRLF in demo.sh. The file will have its original line endings in your working directory...

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

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Cordova build failed - "Task failed with an exception"

What caused this error? I typed "Cordova build" but it failed & gave me the 2 failures, How do I fix this? I did ... build tools, so idek what is going on? I'm using Windows 10...

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

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c# - All indexes of string-array return null

I've been coding in C# (winforms) for a project for 2 weeks now. My goal is to build a GUI for an FFT- ... embeded systems, so sorry for not seeing the problem instantly. Thanks....

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

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关于移动端列表编辑|添加数据后数据更新的方案

如图首先说明一下页面功能和结构移动端下滑会加载更多数据(page++) 每页 10 条页面结构是这样的 --pages --index.vue 主页 --edit.vue 编辑页 --add.vue 添加数据页面自己目前的想法 ... vuex 2.storage 但是因为数据量都很大也是嫌麻烦吧....所以请教各位大佬是否还有更优雅的方案!!!...

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

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jdbc - Error creating driver 'Hadoop / Apache Drill' instance in DBeaver 5.3.4

I am getting below error while trying to connect to a drillbit instance running on my RHEL box from DBeaver ... DBeaver/plugins directory. Strangely this is not working now....

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

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r - Adding the same column to several data frames by looping

I have four data frames, each one consisting of 61 rows and 5 columns. They are called "London", "Chicago" ... which includes keeping the data frames and avoids working with lists?...

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

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salesforce - SFDC email template send using rest api

we have create sample email template in SalesForce Classic Email Templates section. I want to know the Rest API URL for ... know the Rest API example in java. Thanks in advance....

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

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typescript - Clean architecture: about use cases and model

Lets say I have a clean architecture app in TypeScript, with a web implementation, and I have a User model. For every ... a working example for option 2. Any idea will be welcome!...

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

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python - Slow text printing in a function?

Is there a way in Python3 to slow the text that is inside a function? I have created a text-based game that uses ... Sys.stdout.write(char) Sys.stdout.flush() Time.sleep(0.1)...

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

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Pause and resume background music from my flutter app

I am building an app where I need to play some music. For that I would like any background music to pause and as ... this? Currently what it does is just mix both the sounds....

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

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怎么判断小程序来源？

有这几个小程序来源 "toutiao"：头条；"wechat"：微信；"baidu"：百度；"quickapp"：快应用；"qq"：QQ；"alipay"：支付宝；"douyin"：抖音怎么判断？用navigator吗？...

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

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hdl - Implementing a Repetition error correcting code in Verilog

I want to use an FPGA to implement an error correction code but I'm running into some issues. I started ... combinational logic, I would appreciate any help regarding this issue....

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

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js异步数据同步获取

方法1(同步)中调用方法2(返回的数据是异步)怎么让它同步获取数据 function d (){ setTimeout(function(){ return 100 },10) } function r(){ return new ... ).then(res=>{ console.log(res) //这边是Undefined，有办法同步获取数据吗 })...

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

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react的usestate如何变成同步的？

usestate里面的set方法是异步的，但是我想把他变成同步的，该怎么做？？ ` const [fields, setfields] = useState([0]); function change(){ setfields([22, 1]) console.log( ... 这里直接获得[22,1]， } 就是一个异步和同步的问题，怎么解决呢？ `...

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

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为什么打印台的跨域警告在这里显示?

还有这里的this打印为undefined...

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

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我该如何测试一个图片上传服务的瓶颈呢？

最近在做接口测试，测一个上传服务接口的性能我测试并发用的是 go 写的脚本，里面的多并发用 goroutine，每个并发发送的次数则用循环同步上传比如测十个并发，每个并发发送二十次，就用十个 goroutine , 每个goroutine 中 ... 服务的性能瓶颈？正规流程的测试该是什么样子的，像这类测试应该监控哪些参数，来确定接口的瓶颈在哪里？...

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

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table中的radio，怎么分开选择

for (var i = 0; i < td.length; i++) { dom += '<tr>' dom += '<td>' dom += '<span>同意</span>' dom += '<input id="CheckAll" name=" ... ... 这四个radio中只能选择一个，请问以行来分隔选，每行可以选一个呢，老哥应该懂我的意思...

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

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请问不同的表如何联动做出分类选择呢？

有这样两个动态数据第一段：行业： {loop $data $r} <li>{$r['id']}{$r['name']}</li> {/loop} 第二段： <ul> {list table=member order=rand()} <li>昵称：{$t[ ... 是可以实现相同的效果小白一个，只会做点css美化，套个模板，请给个代码实际这个功能吧，谢谢...

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

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