Recent questions in Technique[技术]

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一个webpack打包的vue如何巧妙的使用cdn加速

一个webpack打包的vue如何巧妙的使用cdn加速，求解...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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notebook中无法调用matplotlib

...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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关于npm的几个问题

我fork了一个项目，然后这个项目可能就是作者很少去维护了然后他当初在构建项目的时候使用的插件和包是比较老的版本问题如下：装完依赖以后，提示（deprecate=反对）这个更新！！问题是： 1.我手动在package.json里面去修 ... 修改以后如果插件的api修改以后那么原先构建的代码就会有问题！ 2.你们是怎么解决上面这个报错的？...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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es的箭头函数做参数

最近看vuex的购物车案例疑惑不解其中红色标出的_products和products在这起的什么作用，第一幅图中，箭头函数加上()并且带参数，那么actions中调用的时候参数products是什么？？求解。。。。感谢各位了...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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vue v-for循环默认选中第一个

为什么样式是第一个默认选中了，而里面的input radio却是最后一个 addrSelected初始值是0, 如何修改？ chooseAddr: function (index) { this.addrSelected = index }...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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php - Creating a customer price in woocommerce via API

I have found a plugin that creates customer specific pricing, but seems to be an external API call that seem to not ... product and grab it's product SKU then overwrite the price....

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - How to maintain and get data from multiple firebase DBs for a web-app

I have a web-app at work on web (with react.js), for which recently firebase sharding has been ... to access multiple Realtime Database instances in Cloud Functions for Firebase...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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telegram bot - How To Edit / Delete Message While Using InlineKeyboard Python-Telegarm-Bot

I was developing a bot in python-telegram-bot framework and as on last stage i added some inline keyboard buttons ... ") signal.signal(signal.SIGINT, fs_utils.exit_clean_up) main()...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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reactjs - Switch case statement for dynamically rendering className

Hello I have an array of objects with contain information of job detail. I want to conditionally render a specific class ... depending on the type of job in the array i created...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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php - Unable to insert data in CodeIgniter 4

I am trying out CodeIgniter 4 and I have a problem inserting data. In my model I only defined the table name, no ... happens during the insert method call. How can I debug this ?...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - How to convert this code with switch expression and comparison operations

I implemented the code using if...else.. This is working properly. public static byte GetLengthWithCascadedIfElse(int ... explicit conversion exists (are you missing a cast?)...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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为什么JedisPool得到的Jedis对象在使用完毕后需要手动关闭连接？

jedis使用的单节点模式，集成spring配置如下： <bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig"> <property name="maxTotal" value="600" /> < ... 装，在封装的代码里面进行关闭连接，难道没有其他好的办法了吗？...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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六个opencv项目开发思路，抛砖引玉

1，Opencv基于SURF和opencv的人脸特征检测技术，使用opencv提高编程效率，对视频帧的每一副图像，使用surf算法进行快速鲁棒特性检测 2基于opencv的运动车辆识别与跟踪，使用背景差分，将运动目标从背景中分离出来，并在前景 ... 廓 Canny边缘检测算法流程：输入图像，高斯平滑，梯度计算，非极大值抑制，双门限检测，输出边缘图像 ...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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二维数组指针double **&field经过这个转换 (void*&) field 是什么意思?

本人非计算机专业的工科学生，今天读一个开源软件的源代码，遇到了一个奇怪的强制类型转换，代码如下： void twoWayMPI::getData ( word name, word type, double ** const& field, label ... step)是为了给U指向的内存赋值；那么我想问的是经过(void&)U转换会对U产生什么影响？...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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谁能给我解释下这条Git 命令呢？

git checkout -b remotes/origin/develop...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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两个互不相干的元素。既不是父子也不是兄弟元素，可以进行“鼠标悬浮其中一个元素时另一个元素显示”这种操作吗

如图所示结构，现在想鼠标悬浮Img时出现蓝色选中的div，有办法吗...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Extract the adjacency matrix from MCP_Geographic(skimage)

I'm trying to extract the adjacency matrix in the skimage module to compare with my other adjacency matrix obtained with MATLAB function adjacency(). There is a way to do that?...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Join two queries SQLAlchemy

I need to join two queries and get all the columns from both, but the returned object only contains the columns ... and_(subq_promotions.columns.p_ean == cls.ean)) return results...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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912 views

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vue devtools报错：Uncaught TypeError

vue devtools没有检测出页面的组件，并且每次点击刷新都会报错突然不能用了，昨天还能用呢怎么解决重装了这个插件还是报错 Uncaught TypeError: Cannot read ... ) at t.s (backend.js:formatted:136) at t.n.emit (backend.js:formatted:997)...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Does WPF Textbox respect Unicode BIDI controls like LRI/RLI?

I need to display English + Hebrew text mixed in a text box. I embed each language with the appropriate RLI/ ... special setting on the textbox so it takes it into consideration?...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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264 views

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Python/Dynamodb pagination with query() operation

I have a Dynamodb setup as below: Table name doc_table Primary partition key doc_id (String) Primary sort key create_date ... with the same sort key. Will this create problem?...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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280 views

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关于单击a标签的实现数据导出功能

我要实现的功能是：单击按钮，导出数据生成excel表后端给我地址，我只要把数据发过去，他就能返回地址给我，从而实现下载功能我之前的做法是打开页面的时候就自动生成 ... end=iptVal.split('--')[1]; } $scope.exportVal(interval); $scope.exportData(start,end); })...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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320 views

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为什么WXInvocationConfig这个抽象类会使用单例模式？

为什么WXInvocationConfig这个抽象类会使用单例模式？ + (instancetype)sharedInstance { static id _sharedInstance; static dispatch_once_t onceToken ... self alloc] init]; }); return _sharedInstance; }...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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287 views

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javascript - Typescript Promise rejection type

How do I set the type of the rejection of my promise? Let's say I do: const start = (): Promise<string ... to have compiling error if I use the rejection response type incorrectly....

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

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phpstorm 中css文件可以自定义属性值的单位吗？

微信小程序自定义了一个样式文件格式：.wxss里面一个单位：rpx 为了开发方便我将.wxss文件光临成CSS了现在问题来了，当我在写 .bannerImg { width: 750rpx; height: 430rpx; } 时，phpstorm会 ... ; height: 430 rpx; } 请问有什么好的办法解决啊，写代码的时候各种报错心很累啊...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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577 views

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vue.js中子父级双向绑定报错的原因？

这是我的代码过程，虽然已经实现了双向绑定，但是当通过子组件改变数据时，浏览器就会报错。...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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879 views

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magento2 - Magento 2 observer not using correct locale for translation

I have added an observer using the code below, it triggers correctly but the translated text is English. It is supposed to ... ($order){ return __('10 working days'); } }...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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464 views

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如何实现字体颜色渐变？

...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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