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Why is there no multiple inheritance in Java, but implementing multiple interfaces is allowed?
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@curiousguy Containing more than one subobject of same base class, ambiguity (override from which base class use), complicated rules of resolving such ambiguity.
– Tadeusz Kopec
May 22 '13 at 7:54
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What is the standard Python docstring format? [closed]
...owed. However the default Sphinx docstring format was not mentioned and is based on reStructuredText (reST). You can get some information about the main formats in this blog post.
Note that the reST is recommended by the PEP 287
There follows the main used formats for docstrings.
- Epytext
Histo...
What are the specific differences between .msi and setup.exe file?
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An MSI is a Windows Installer database. Windows Installer (a service installed with Windows) uses this to install software on your system (i.e. copy files, set registry values, etc...).
A setup.exe may either be a bootstrapper or a non-msi installer. A non-...
How to get commit history for just one branch?
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The git merge-base command can be used to find a common ancestor. So if my_experiment has not been merged into master yet and my_experiment was created from master you could:
git log --oneline `git merge-base my_experiment master`..my_ex...
How to rename a single column in a data.frame?
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How there not a wrapper function for this in base?
– ifly6
Sep 6 '18 at 17:03
1
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Is there a query language for JSON?
...or both together. And XPath 3.1 can too.
The list is growing:
JSONiq (based on XQuery)
UNQL (like SQL)
JaQL (functional)
JsonPath (XPath-like)
Json Query (sort of XPath-like)
GraphQL (template-based, typed)
share
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Client-server synchronization pattern / algorithm?
...and distributes the deltas to the clients. This is the typical case. Databases call this "transaction replication".
Client has lost synchronization. Either through a backup/restore or because of a bug. In this case, the client needs to get the current state from the server without going through ...
How can I safely encode a string in Java to use as a filename?
...eason I tend to allow the user to enter what they want, store the filename based on a scheme of my own choosing (eg userId_fileId) and then store the user's filename in a database table. That way you can display it back to the user, store things how you want and you don't compromise security or wipe...
Can I implement an autonomous `self` member type in C++?
...oo)
{
/* ... */
};
You can even do multiple inheritance with as many base classes as you want (thanks to variadic templates and variadic macros):
class WITH_SELF(Foo2)
{
/* ... */
};
class WITH_SELF_DERIVED(Bar2,Foo,Foo2)
{
/* ... */
};
I have verified this to work on gcc 4.8 and c...
How to filter files when using scp to copy dir recursively?
.../me.class the problem is, there are many other useless files such as .svn-base files that i don't want. how can i filter them so I only scp .class files?
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