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APP INVENTOR硬件交互学习教程10——多个虚拟界面实现 - 创客硬件开发 - 清...

...辑 通过配置垂直布局实现两个虚拟界面切换。 1.界面设计 增加了两个垂直布局,作为界面1和界面2的容器存放每个页面的内容;增加导航布局,水平布局增加两个按钮,用于切面切换。 2.逻辑设计 定义三个过程,用来...
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APP INVENTOR硬件交互学习教程11——滑条控制舵机 - 创客硬件开发 - 清泛IT...

这节我们通过滑条控件控制舵机动作。 1.界面设计 增加滑条控件和标签控件,滑条控制舵机动作,标签显示滑条数值。 2.逻辑设计 增加当滑条改变时,显示和发送指令给下位机 3.工程参考
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App Inventor 2 计时器(Clock)详细用法示例 · App Inventor 2 中文网

...用法示例 计时器在界面设计中的哪里? 计时器怎么启动? 怎么确定计时器执行没? 怎么获取手机当前时间? 格式化时间,上面函数返回的当前时刻格式化成文本: 24小时格式怎么写? ...
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How to understand Locality Sensitive Hashing?

...er 3 - Finding Similar Items http://infolab.stanford.edu/~ullman/mmds/ch3a.pdf Also I recommend the below slide: http://www.cs.jhu.edu/%7Evandurme/papers/VanDurmeLallACL10-slides.pdf . The example in the slide helps me a lot in understanding the hashing for cosine similarity. I borrow two slides f...
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数据挖掘——分词入门 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术

...int(matchWord + " "); } else { //从当前词开始往后都没有能够匹配上的词,则按照单字切分的原则切分 System.out.print(str.substring(j, ++j) + " "); } matchWord = ""; } } } 输出结...
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How to check if a string contains an element from a list in Python

... extensionsToCheck = ('.pdf', '.doc', '.xls') 'test.doc'.endswith(extensionsToCheck) # returns True 'test.jpg'.endswith(extensionsToCheck) # returns False share ...
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The Definitive C Book Guide and List

...the draft C11 standard. The new C standard - an annotated reference (Free PDF) - Derek M. Jones (2009). The "new standard" referred to is the old C99 standard rather than C11. Rationale for C99 Standard. Beginner C Programming: A Modern Approach (2nd Edition) - K. N. King (2008). A good book...
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大单融资后,MOOC去哪儿 - 资讯 - 清泛网 - 专注C/C++及内核技术

...学校的教学能力。” 在MOOC逐渐受到关注的同时,资本也开始发力。2014年12月,果壳网与学堂在线分别获得C轮和A轮融资。据了解,自B轮起,果壳网便开始将资金投入MOOC社区产品中,并令它迅速成为了互联网企业MOOC的代表性产...
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Calculate MD5 checksum for a file

I'm using iTextSharp to read the text from a PDF file. However, there are times I cannot extract text, because the PDF file is only containing images. I download the same PDF files everyday, and I want to see if the PDF has been modified. If the text and modification date cannot be obtained, is a ...
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How do I tar a directory of files and folders without including the directory itself?

... "%P\n" -type f -o -type l -o -type d > textfile.txt > documentation.pdf > subfolder2 > subfolder > subfolder/.gitignore For example if you want to filter PDF files, add ! -name '*.pdf' $ find /my/dir/ -printf "%P\n" -type f ! -name '*.pdf' -o -type l -o -type d > textfile.txt &...