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Can overridden methods differ in return type?
... return type must match exactly. In Java 5.0, it introduces a new facility called covariant return type. You can override a method with the same signature but returns a subclass of the object returned. In another words, a method in a subclass can return an object whose type is a subclass of the type...
Resolving a 'both added' merge conflict in git?
...wers : When doing ... git checkout --ours someFile It may seem like it didn't do anything when doing git status. Just Remember to do this afterwards. git add someFile git status
– pec
Oct 26 '15 at 1:27
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if A vs if A is not None:
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The statement
if A:
will call A.__nonzero__() (see Special method names documentation) and use the return value of that function. Here's the summary:
object.__nonzero__(self)
Called to implement truth value testing and the built-in operation...
Big O, how do you calculate/approximate it?
...on is the size of the structure to process. It means that this function is called such as:
Number_Of_Steps = f(data.length)
The parameter N takes the data.length value. Now we need the actual definition of the function f(). This is done from the source code, in which each interesting line is numb...
How to put multiple statements in one line?
... potential exception". The pass then says you wish to not handle it specifically. But that means your code will continue running, which it wouldn't otherwise.
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Allowed characters in Linux environment variable names
...va or perl) initializes a variable with special characters in its name and calls another executable (a child process) the latter executable can access that variable without problems.
– oᴉɹǝɥɔ
May 14 '15 at 20:18
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Remove files from Git commit
... the commit that you want the file to conform to.
git checkout <commit_id> <path_to_file>
you can do this multiple times if you want to remove many files.
2.
git commit -am "remove unwanted files"
3.
Find the commit_id of the commit on which the files were added mistakenly, let's...
Memcache Vs. Memcached [duplicate]
...asker: For many *nix applications, the piece that does the backend work is called a "daemon" (think "service" in Windows-land), while the interface or client application is what you use to control or access the daemon. The daemon is most often named the same as the client, with the letter "d" append...
Build android release apk on Phonegap 3.x CLI
How can I build an android app locally using the Phonegap 3.x CLI, ready to release? I check the bin folder generated inside the platforms/android directory of the project, and only has .debug APKs.
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Rails has_many with alias name
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Give this a shot:
has_many :jobs, foreign_key: "user_id", class_name: "Task"
Note, that :as is used for polymorphic associations.
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