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Extract a dplyr tbl column as a vector
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This seems the most versatile method as it works identically with vectors and data.frames, i.e. it enables functions to be more agnostic.
– geotheory
Mar 14 '17 at 10:03
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How to make an empty div take space
...ing a <table> here, though? They will do this kind of stuff automatically.
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Android SDK on a 64-bit linux machine
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Yes, it is. You need to install the ia32 libraries. Check out the Ubuntu Linux troubleshooting section.
apt-get install ia32-libs
apt-get install sun-java6-jdk
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How to urlencode data for curl command?
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@kberg actually, this will only work for query data. curl will append a '?' followed by the urlencoded params. If you want to urlencode some url postfix (such as a CouchDB GET for some document id), then '--data-urlencode' won't work.
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Is there any way to git checkout previous branch?
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wow, I totally should have just tried it! figured - was a shell-ism, and that if the functionality was in git, it would be something different
– Matt Briggs
Aug 26 '11 at 16:17
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void in C# generics?
...nctions need to return null, but if it unifies your code, it should be a small price to pay.
This inability to use void as a return type is at least partially responsible for a split between the Func<...> and Action<...> families of generic delegates: had it been possible to return void...
Unable to import a module that is definitely installed
After installing mechanize , I don't seem to be able to import it.
32 Answers
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How to work with Git branches and Rails migrations
...s and many of them include db migrations. We try to be careful but occasionally some piece of code in master asks for a column that got removed/renamed in another branch.
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C/C++中的段错误（Segmentation fault） - C/C++ - 清泛网 - 专注C/C++及内核技术
... occurs when a program attempts to access a memory location that it is not allowed to access, or attempts to access a memory location in a way that is not allowed (e.g., attempts to write to a read-only location, or to overwrite part of the operating system). Systems based on processors like the Mot...
Ajax success event not working
... tries to parse it as such, it fails. You can catch the error with error: callback function.
You don't seem to need JSON in that function anyways, so you can also take out the dataType: 'json' row.
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