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PG::ConnectionBad - could not connect to server: Connection refused
... #2 is a great suggestion: "Check server.log". My error was actually caused by upgrading to Yosemite, the server log said: FATAL: could not open directory "pg_tblspc": No such file or directory. This answer helped me with that problem stackoverflow.com/questions/25970132/…
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How do I build a numpy array from a generator?
... lists. This is necessary so that space for each item can be consecutively allocated in memory. Consecutive allocation is the key feature of numpy arrays: this combined with native code implementation let operations on them execute much quicker than regular lists.
Keeping this in mind, it is techni...
App Inventor 2 接入百度网盘API · App Inventor 2 中文网
...载
1、申请应用
2、用户登录认证，拿到access_token，后续请求必备参数 【使用Web浏览框】
3、获取文件列表，返回JSON，拿出想要的文件的fsid 【使用Web客户端】
4、获取文件信息，返回JSON，根据fsid取出dlink 【...
Naming convention for Scala constants?
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The officially recommended style (and I do mean officially) is the first style, camel case with first letter are upper case. It's laid down clearly by Odersky on Programming in Scala.
The style is also followed by the standard library...
How to automate createsuperuser on django?
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Personally I don't think deleting the user on each build is a good idea. You risk unintentionally deleting any associated records via a cascade delete. A safer option is to simply bail-out if the user already exists (or update the ...
How do I maintain the Immersive Mode in Dialogs?
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I get 'requestFeature() must be called before adding content' (I think it depends on active features on activity). Solution: Move the dialog.show() one line up so show() is invoked before copying SystemUiVisibility (but after setting non-focusable). Then it ...
How to log something in Rails in an independent log file?
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If you want to change all the default logging for that specific model, you can simply use User.logger = Logger.new(STDOUT) or wherever you want to log to. In the same way, ActiveRecord::Base.logger = Logger.new(STDOUT) will change all the logging ...
What is a “translation unit” in C++
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A translation unit is for all intents and purposes a file (.c/.cpp), after it's finished including all of the header files.
http://msdn.microsoft.com/en-us/library/bxss3ska%28VS.80%29.aspx
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Do DOM tree elements with ids become global variables?
...ts’ are added as apparent properties of the document object. This is a really bad idea, as it allows element names to clash with real properties of document.
IE made the situation worse by also adding named elements as properties of the window object. This is doubly bad in that now you have to av...
Make a negative number positive
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Note the edge cases, e.g. Math.abs(Integer.MIN_VALUE) = Integer.MIN_VALUE.
– Zach Scrivena
Jan 30 '09 at 0:24
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