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1.3k views

1 answer

flutter - How to fix "NoSuchMethodError: The getter 'path' was called on null" on ImagePicker Cancel Button?

Guys I am using ImagePicker plugin to access the images in my app, but if I decide to cancel it I get this error ... editImage(file.path); }, child: Text('Camera'), ),...

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

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895 views

1 answer

python - Dynamically adding checkboxes for each file in a directory PYQT5

I want to dynamically add checkboxes for every file in a directory but when there's more than 10 files it just looks ... 145, 260, 75, 23)) self.okButton.setObjectName("okButton")...

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

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771 views

1 answer

css 背景图问题（react）

上面是我的背景图，我需要他显示在宽100%高331pt的div中，可是实际的效果却是这样子（下图）我的代码是 `` <div className="qualification" style={{ backgroundImage: `url(${ ... 100%; height: 331.35pt; } `` 请教下各位大神是哪儿出错了！感激不尽！...

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

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1.4k views

1 answer

reactjs - Material-ui popup state popover not working

I used material-ui-popup-state package to add customised menus on my header. I'm using code similar to the code in ... this a known issue, is there any work-around? Sample code...

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

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1.3k views

1 answer

python 3.x - Triple for-loop in a vector

I have a simple numpy array (3xN) like: v = np.array([[-3.33829, -3.42467, -3.53332], [-2.67681, -2.6082 , ... rows from v. How can I implement it on Python in a fast way?...

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

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1.0k views

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为何finalize不一定会被调用？

书上有句话:"你不知道finalize()会不会被调用（即使能确定他调用，也不知道在什么时候调用）"，这里的“你不知道finalize()会不会被调用”该怎么理解，不是说对象被回收前一定会调用这个方法吗?...

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

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1.3k views

1 answer

gradle - How to skip a specific migration

Does anybody know, how can I skip a specific migration using Flyway? I mean, to not execute and not write ... see records only for migrations V1, V3 in flyway_schema_history table....

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

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1.3k views

1 answer

ubuntu18.4 连接虚拟机(linux),需要哪些必备条件?

正确答案：虚拟机(跳板机)权限没开.，与常见的一台机器用VM等软件安装虚拟机不同．当前连接失败,互ping不通. 网上多数是windows连接虚拟机,ubuntu为客户端资料很少. 需要哪些设置? 注: 1. ... IP显示IP:124._._. , linux系统IP显示: 192._._. 3.ubuntu 18.4本机IP,172...*...

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

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1.3k views

1 answer

Android Pie AOSP default Camera orientation issue: Camera sensor roated to 90 degrees right and Display is in reverse landscape mode

I am using an (Android Pie) AOSP Camera2 application. (packages/apps/Camera2) We are using Camera module OV5640. ... , Matrix.ScaleToFit.FILL); break; Thank and Regards, Devendra...

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

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1.3k views

1 answer

javascript - A way to complete for loop before next operation

I have a big array of objects that i got from my rest api and i want to search for a value from one of ... before returning the new array with the search results. Thanks in advance...

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

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1.5k views

1 answer

java - Thread call from Abstract Class for child classes?

Hi so I have repetitive Code and want to get rid of it. I want to get rid of the scheduler call (scheduler. ... . scheduler.schedule(this::transition, 10, TimeUnit.SECONDS); } }...

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

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1.9k views

1 answer

vue-cli3 如何查看打包时间

以前webpack在打包时会把打包时间答应在命令行工具中，现在vue-cli3打包并不会打印在命令行中；请问如何解决...

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

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2.5k views

1 answer

微信公众号开发，使用微信测试号可以接收到用户发的消息，换成正式订阅号或者服务号发送就接收不到

微信公众号开发，使用微信测试号可以接收到用户发的消息，换成正式订阅号或者服务号发送就接收不到，是测试跟正式有什么区别么，求解...

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

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2.4k views

1 answer

vue-cli打包后vendor.js过大的原因？

为什么脚手架打包以后，里面的vendor文件有一兆多，我已经吧第三方的elementUI，vuex，echarts等采用cdn的方式引入了，路由也是采用懒加载的方式引入的，可还是有这么大，上线后刷新就加载特别慢，这个vendor文件夹花了七八秒钟，有什么好的方法解决吗？...

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

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2.6k views

1 answer

在vue.config.js中怎么配置将一个第三方库编译成es5

const path = require('path'); function resolve(dir) { return path.join(__dirname, dir); } module.exports = { publicPath: '/wf/', ... : { compress: true, port: 9000, proxy: {} }, };...

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

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2.7k views

1 answer

verilog - Functional Coverage - bin that collects all values that are not collected in other bins

ipv6_hdr__f_next_header_cp: coverpoint this.ipv6_hdr.ipv6_f_next_header iff (this.has_ipv6_header){ bins ipsec_33 = {'h33}; bins ... way of making the default an active bin?...

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

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2.9k views

1 answer

vue v-for中的:style怎么使用过滤器

我item.img，要在前面拼接一个地址，请问可以实现吗item.img|imgFormatter不行 <div class="swiper-slide" :style="{backgroundImage: 'url(' + item.img + ')'}"> <div class="text-c cm-content"> </div> </div>...

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

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3.2k views

1 answer

python - pandas reshaping dataframe with different length rows

I have a the following pandas data frame with the index on the left: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... then break to a new line. The real table has over 150 columns. thanks...

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

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3.9k views

1 answer

sql - How to avoid using limit clause in my redshift query?

I have a below query where I am using limit 8 to get value of dates as shown below: SELECT (date_trunc(' ... --- error: Output timestamp out of range after subtracting constant....

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

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3.5k views

1 answer

算法：按照标签相似度获取指定数量的其他值？

加入有一个游戏包含很多标签，这个时候有一个游戏推荐的栏目，其规则如下：首先寻找标签完全一致的游戏，有4个就提取4个不够4个就寻找标签有一个不同的游戏，依次类推直到全不相同的游戏好像有什么二进制运算啥的，但是搞不清楚。跪求大佬指引？...

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

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3.6k views

1 answer

echarts 怎么给每一个series配置单独的barGap

echarts演示链接当前代码实现效果如下图所示想要将进度数据宽度减小,并在总体进度中居中显示显示效果如下本来想用barGap进行距离控制,但是barGap只能够设置一个,导致了警戒线series也进行了偏移请问能够给一个series设置单独的barGap, 或者是否有其他解决方案...

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

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3.9k views

1 answer

soap解析问题

curl 请求返回结果 <soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"><soap:Body><ns2:getSellInfoByBottomNosResponse ... /解析不行 new SimpleXMLElement($res);//解析不行求解析...

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

0 votes

3.9k views

1 answer

shiny - How do i perform paging through BigQuery in R?

I am fetching a large data table (around 50k rows) via bigrquery and after performing some calculation displaying that data ... max_results = 5000,start_index = si) %>% as_tibble()...

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

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3.8k views

1 answer

ksh - Proper way to store environment variables for cron jobs

We have a few ksh scripts, running as user cron jobs on RHEL7. user is set with /sbin/nologin. What is the ... just not sure how it translates to ksh script running via cron....

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

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4.2k views

1 answer

google sheets - Python gspread - Requested writing within range, but tried writing to row [x]

Here is the problematic line of code: master_wk.update('A' + str(master_index) + ':' + 'G' + str(master_index), [ ... issue with columns, but I'm dealing with rows here. Any ideas?...

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

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3.3k views

1 answer

SpringBoot多模块打包，程序包com.abbott.common.controller不存在

父pom.xml <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" ... > </configuration> </plugin> </plugins> </build> </project>...

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

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3.3k views

1 answer

yaml中当stages中某个阶段没有任务时，下一个任务如何执行？

stages: - test - build .job-test: stage: test script: - yarn run test build: when: on_success ... 这样的话，build会在前一个任务success时执行，如果没有test任务，或者test被disable了，那么build任务会怎么样呢？...

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

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3.2k views

1 answer

python - While reading txt file lines. I can't "append list" or "update dictionary" why?

I have txt file like that: "aroint" : "Lorem.", "agama" : "Simply.", "allantoidea" : "Dummy.", "ampelopsis" : " ... I can see just the last lines dictionary. How I can fix that?...

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

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