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Add legend to ggplot2 line plot

... about legends in ggplot2. I managed to plot three lines in the same graph and want to add a legend with the three colors used. This is the code used ...
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How can I extract embedded fonts from a PDF as valid font files?

...f the pdftk.exe utility that can indicate which fonts are used by a PDF, and wether they are embedded or not. 8 Answers ...
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Why / when would it be appropriate to override ToString?

I'm studying C# and I wonder what the point and benefit of overriding ToString might be, as shown in the example below. 1...
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Can I prevent text in a div block from overflowing?

...the overflowing text in the div to automatically newline instead of being hidden or making a scrollbar, use the word-wrap: break-word property. share | improve this answer | ...
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How to make shallow git submodules?

...dule update" can optionally clone the submodule repositories shallowly. (And git 2.10 Q3 2016 allows to record that with git config -f .gitmodules submodule.<name>.shallow true. See the end of this answer) See commit 275cd184d52b5b81cb89e4ec33e540fb2ae61c1f: Add the --depth option to th...
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What is the meaning of the term arena in relation to memory?

... arena , but never defines it. I've searched for the meaning of the word and how it relates to memory, and found nothing. Here are a few contexts in which the author uses the term: ...
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What's the difference between setWebViewClient vs. setWebChromeClient?

...at's the difference between setWebViewClient vs. setWebChromeClient in Android? 4 Answers ...
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Local Storage vs Cookies

... Cookies and local storage serve different purposes. Cookies are primarily for reading server-side, local storage can only be read by the client-side. So the question is, in your app, who needs this data — the client or the server? ...
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Throw HttpResponseException or return Request.CreateErrorResponse?

After reviewing an article Exception Handling in ASP.NET Web API I am a bit confused as to when to throw an exception vs return an error response. I am also left wondering whether it is possible to modify the response when your method returns a domain specific model instead of HttpResponseMessage...
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数据存储组件 · App Inventor 2 中文网

...应用程序。兼容模式可用于旧的应用程序(新约束之前)Android 上的文件访问。 行数据 获取当前已加载的源文件的行数据列表。 源文件 设置数据解析的源文件,然后异步解析文件。结果存储在 列数据 、行数据 及 列名列...