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462 views

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ContentResolver musicResolver = getContentResolver(); Uri musicUri = android.provider.MediaStore.Audio.Media.INTERNAL_CONTENT_URI; Cursor musicCursor = ... 要用什么方法得到本地的音乐文件信息？...

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

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436 views

1 answer

已经安装'laravel/homestead' box, 执行homestead up时提示找不到box.求助.宿主机mac

执行 vagrant up 命令会提示 The provider 'virtualbox' could not be found, but was requested to back the machine 'homestead ... (virtualbox, 0.6.0) your-desired-host-name:Homestead Anan$...

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

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377 views

1 answer

如何减少使用或者不用LEFT JOIN查询？

问题描述： 1 MYSQL语句如下，一大堆的LEFT JOIN，外加一个in的大数组，查询很慢，效率差，如何改造呢？ 2 explain不起作用了 3 采用MYSQL递归查询找出所有下级的方式原来试过，但是不好用，出现的问题是，比如说：前面注册了 ... 建议或意见收集 1 针对以上的问题希望能在这里找到答案 2 关于我们的计划改造方案有何不足之处吗？...

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

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541 views

1 answer

电脑管家清理垃圾动画是如何实现的？最好能附上代码

请问这个效果怎么实现？用canvas？...

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

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415 views

1 answer

echarts的数据渲染问题

我用动态数据渲染折线图，item如下： var item = { name: legendArr[k], type: 'line', data: sArr[k], smooth: true, label: { normal: { show: true, position ... 一项都不一样的颜色，就是["a1","a2","a3","b","c","d"]...

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

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454 views

1 answer

pip install出现下面图中的报错什么原因？

这是什么错误？如何解决？求大神指导...

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

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184 views

1 answer

html - Flexbox bug on safari

I'm having an issue with some divs in Safari, other browsers work fine. Sometimes, but not every time, these ... 1px solid #BDBDBD; border-radius: 10px; background: #FFFDF8; }...

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

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324 views

1 answer

python - importlib does not show neither error nor does call the script

It was just three weeks, I started learning python and speeding up so fast to pick many things. Honestly I jumped into ... issue while there is no error. Please help and advice....

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

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241 views

1 answer

javascript - Show search bar when scroll to a specific Offset y

I'm using a flatlist in React Native. I want to show a search bar instead of icons when the user scrolls ... search when scrolling stopped... otherwise it keeps showing the icons....

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

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990 views

1 answer

awk - Masscan output How can I grab just the ip:port and save to a file?

Im using "masscan -iL /home/iplist.txt -oL /home/result.txt --open --rate 10000 -p1-65535" After masscan scanning ip ranges ... .119.78:3388 149.240.248.56:1221 88.198.83.9:1234...

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

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525 views

1 answer

ssh 登录服务器的指纹如何获取、验证，以及除了中间人攻击外什么操作会改变服务器指纹？

事情由来：登录自己的vps时提示REMOTE HOST IDENTIFICATION HAS CHANGED! 显示如下 @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: REMOTE HOST ... =o... | +----[SHA256]-----+...

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

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286 views

1 answer

html - What is DOCTYPE?

What is DOCTYPE and why do I want to use it? What are the different DOCTYPEs I can use? What is the difference ... Lastly, what is the proper DOCTYPE that I should be using?...

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

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546 views

1 answer

c++ - ESP32 Regex search for all iterations

I am using Bluetooth and receiving a CSS gradient string like this: (90deg, rgba(66, 68, 90, 1) 0%,rgba(72, 79, ... 0 matches. Does anyone know to match all occurrences on an ESP?...

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

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195 views

1 answer

怎么看springmvc的源码？

我正在看尚硅谷的springmvc的视频，我看到佟刚老师用ctrl shift r就可以看springmvc的源码，比如说HiddenHttpMethodFilter，我却看不到为什么？我也想看，我该怎么看？...

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

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1.2k views

1 answer

golang 协程怎么解释

1.协程对应操作系统里面的什么 2.golang是如何实现的...

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

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170 views

1 answer

javascript - Uncaught TypeError: postData.likes is undefined in express

Hello everyone im experiencing a type error when trying to console.log the amount of likes on a post . I get postData.likes is ... (400); }); res.status(200).send(post); };...

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

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419 views

1 answer

vuejs中，如何使一个自定义函数在加载时自动执行

比如在一个组件中定义了一个方法： export default { methods: { changeIcon () {} } } 如何使changeIcon函数自动执行呢？...

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

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195 views

1 answer

javascript - How can add another chart to this dashboard?

I want to add another line chart to this dashboard at the bottom left under pie chart. I changed the height and width of the ... left was empty. Of course, I am a beginner in d3....

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

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1.0k views

1 answer

c# - read weighing scale data via RS232

I want to read data from weighing scale data via RS232 and i try any more way my weighing scale model yh-t7e ... program Displays the number 48 What should I do? thanks regards...

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

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91 views

1 answer

python标准库partial代码

def partial(func, args, *keywords): def newfunc(*fargs, **fkeywords): newkeywords = keywords.copy() newkeywords.update(fkeywords) ... args newfunc.keywords = keywords 这三句话好像没什么用处啊？...

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

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206 views

1 answer

python - List of lists changes reflected across sublists unexpectedly

I needed to create a list of lists in Python, so I typed the following: myList = [[1] * 4] * 3 The list looked ... someone please explain what's going on, and how to get around it?...

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

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553 views

1 answer

手机端怎么实现返回顶部效果呢？（手机端滚动条会隐藏，无法检测）我用的sui 框架 a的锚点功能不能用，有没有js方法？

如题，因为用了sui框架，a的锚点链接效果没作用，虽然我禁用了路由功能，还是不行请问有没有js方法实现返回顶部?或者哪位大神熟悉sui框架我该怎么实现呢？...

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

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332 views

1 answer

c++ - WINAPI, old value in backround after RedrawWindow()

I'm beginner in WINAPI and I would like to ask you about help. I have main window with about 10 child's windows (edit ... return (INT_PTR)TRUE; } break; } return (INT_PTR)FALSE; }...

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

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497 views

1 answer

用mysql workbench创建了一个存储过程，apply之后报错

我的user表是这样的结构 CREATE TABLE `user` ( `id` int(11) NOT NULL AUTO_INCREMENT, `name` varchar(45) NOT NULL, `birthday` date NOT NULL, `money` ... 存储过程两次apply之后有错误本人小白，希望各位帮我看一下谢谢了 ...

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

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418 views

1 answer

How do i convert a date in varchar (1-Jan-2020) to date type in DB2 sql?

I have a column with dates as below in my db2 table. 4-Jan-2020 7-Sep-2020 7-Dec-2020 I want to convert them to ... -09-07 2020-12-07 respectively. How do I achieve this? Thanks....

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

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1.2k views

1 answer

phpstorm 的注释快捷键时而有效，时而失效！

最近更新到最新版到 phpstorm，之后它到注释快捷键就时而有效，时而失效。我试着一个一个关闭其它有可能影响到快捷键到软件，但依然无效。...

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

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576 views

1 answer

手机第三方浏览器调用微信支付

看了官方文档，没大看懂... 有demo可以参考一下嘛？或是详细一点的说明谢谢...

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

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386 views

1 answer

phpExcel为什么导出的表边框只有竖线?

public function sincewriter($cart,$shopname) { $obj = new PHPExcel(); $obj->getProperties()->setCreator ... ()->getAllBorders()->setBorderStyle(PHPExcel_Style_Border::BORDER_THIN);...

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

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