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Numbering rows within groups in a data frame
Working with a data frame similar to this:
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Transposing a 2D-array in JavaScript
I've got an array of arrays, something like:
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How to profile a bash shell script slow startup?
My bash shell takes up to 3-4 seconds to start up, while if I start it with --norc it runs immediately.
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How can I troubleshoot my Perl CGI script?
I have a Perl script that isn't working and I don't know how to start narrowing down the problem. What can I do?
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Is there any way to git checkout previous branch?
I sort of want the equivalent of cd - for git. If I am in branch master and I checkout foo , I would love to be able to type something like git checkout - to go back to master , and be able to type it again to return to foo .
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LinearLayout not expanding inside a ScrollView
I have a LinearLayout inside a ScrollView that has android:layout_height="fill_parent" , but it doesn't expand to the full height of the ScrollView . My layout looks something like:
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What's the role of adapters in Android?
I want to know when , where and how adapters are used in the context of Android.
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HTTP error 403 in Python 3 Web Scraping
I was trying to scrap a website for practice, but I kept on getting the HTTP Error 403 (does it think I'm a bot)?
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RSA 算法是如何诞生的 - 创意 - 清泛网 - 专注C/C++及内核技术
RSA 算法是如何诞生的最近为了研究某个极其无聊的问题，读了一些公钥加密的历史，意外地发现这段历史竟然非常有趣。尤其是 RSA 算法的诞生过程，被很多书写得...最近为了研究某个极其无聊的问题，读了一些公钥加密的历史...
What is the simplest way to get indented XML with line breaks from XmlDocument?
When I build XML up from scratch with XmlDocument , the OuterXml property already has everything nicely indented with line breaks. However, if I call LoadXml on some very "compressed" XML (no line breaks or indention) then the output of OuterXml stays that way. So ...
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