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Convert data.frame columns from factors to characters
...frame to character). This solution is robust to a data.frame that contains mixed types.
– Joshua Ulrich
Aug 1 '13 at 21:42
3
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The multi-part identifier could not be bound
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You are mixing implicit joins with explicit joins. That is allowed, but you need to be aware of how to do that properly.
The thing is, explicit joins (the ones that are implemented using the JOIN keyword) take precedence over implic...
How to get GET (query string) variables in Express.js on Node.js?
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@mikermcneil you probably mixed up req.param() and req.params (object). According to expressjs docs req.param() looks for value in all three objects. expressjs.com/api.html#req.param
– Ben Sinclair
May 2 '13 at 6...
Self-references in object literals / initializers
...Bergi, if you feel it's that important, why not add your own answer to the mix?
– zzzzBov
Aug 1 '15 at 19:22
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Smart pointers: who owns the object? [closed]
...mart pointer itself (RAII, again). The problem is that circular references mixed with reference counted smart pointers can be deadly, so you have to deal both with both shared pointers and weak pointers. So you have still ownership to consider (the weak pointer could well point to nothing, even if i...
Javascript switch vs. if…else if…else
...es don’t have such optimizations, performance of the switch statement is mixed.
– Jasper
May 17 '13 at 17:23
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你真的了解熊市有多么可怕吗？ - 创意 - 清泛网 - 专注C/C++及内核技术
...公司大厅空无一人，除了工作人员已经没人。报纸的证券版越来越小，电视的证券节目全部都在深夜，新闻已经不再报道行情，因为天天都是跌。
每天出现的股评高手，说的都是如何杀跌换股，短线操作而不是持有。
每隔几...
What is the Haskell response to Node.js?
I believe the Erlang community is not envious of Node.js as it does non-blocking I/O natively and has ways to scale deployments easily to more than one processor (something not even built-in in Node.js). More details at http://journal.dedasys.com/2010/04/29/erlang-vs-node-js and Node.js or Erlan...
How to import a .cer certificate into a java keystore?
...e development of a Java webservice client I ran into a problem. Authentication for the webservice is using a client certificate, a username and a password. The client certificate I received from the company behind the webservice is in .cer format. When I inspect the file using a text editor, it ha...
Parallelize Bash script with maximum number of processes
... > {.}.out"
GNU Parallel makes sure the output from each job does not mix, so you can use the output as input for another program:
some-command | parallel do-something | postprocess
See the videos for more examples: https://www.youtube.com/playlist?list=PL284C9FF2488BC6D1
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