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Why are my basic Heroku apps taking two seconds to load?
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If your application is unused for a while it gets unloaded (from the server memory).
On the...
Get line number while using grep
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grep -n SEARCHTERM file1 file2 ...
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Check if table exists without using “select from”
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How to check whether a file or directory exists?
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// exists returns whether the given file or directory exists
func exists(path string) (bool, e...
Order of member constructor and destructor calls
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In other words, are members guaranteed to be initialized by order of declaration and destroye...
The differences between .build, .create, and .create! and when should they be used?
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edited May 23 '17 at 10:31
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answered Dec 31 '08 at 18:26
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Is volatile expensive?
After reading The JSR-133 Cookbook for Compiler Writers about the implementation of volatile, especially section "Interactions with Atomic Instructions" I assume that reading a volatile variable without updating it needs a LoadLoad or a LoadStore barrier. Further down the page I see that LoadLoad ...
START_STICKY and START_NOT_STICKY
...fficial documentation.
Source: http://android-developers.blogspot.com.au/2010/02/service-api-changes-starting-with.html
The key part here is a new result code returned by the function,
telling the system what it should do with the service if its process
is killed while it is running:
START_STICKY i...
AttributeError(“'str' object has no attribute 'read'”)
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189
The problem is that for json.load you should pass a file like object with a read function defi...
What is the difference between Class and Klass in ruby?
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class is a keyword used to define a new class. Since it's a reserved keyword, you're not able ...