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Adding multiple columns AFTER a specific column in MySQL
...d by commas. This is a MySQL extension to standard SQL, which permits only one of each clause per ALTER TABLE statement.
– informatik01
May 1 '19 at 13:21
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What is the difference between the Data Mapper, Table Data Gateway (Gateway), Data Access Object (DA
...O, DataTableGateway and Repository, all have a similar purpose (when I use one, I expect to get back a Customer object), but different intent/meaning and resulting implementation.
A Repository "acts like a collection, except with more elaborate querying capability" [Evans, Domain Driven Design] and...
How do I find the location of my Python site-packages directory?
...oris Bruynooghe, Brianna Laugher, Florian Bruhin and others
Author-email: None
License: MIT license
Location: /home/peter/.local/lib/python3.4/site-packages
Requires: more-itertools, atomicwrites, setuptools, attrs, pathlib2, six, py, pluggy
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Is there a VB.NET equivalent for C#'s '??' operator?
...r (Visual Basic)
Uses short-circuit evaluation to conditionally return one of two
values. The If operator can be called with three arguments or with two
arguments.
If( [argument1,] argument2, argument3 )
If Operator Called with Two Arguments
The first argument to If can be omit...
Is it possible in Java to catch two exceptions in the same catch block? [duplicate]
...feature where if you rethrow ex in the catch, the compiler knows that only one of the listed exceptions can be thrown.
Java 6 and earlier
Prior to Java 7, there are ways to handle this problem, but they tend to be inelegant, and to have limitations.
Approach #1
try {
// stuff
} catch (Exc...
In C#, What is a monad?
...his is a simple monad, it is a way of combing small computations to bigger ones. The ; says "do the thing on the left, then do the thing on the right".
Another thing that can be seen as a monad in object oriented languages is the .. Often you find things like this:
a.b().c().d()
The . basically ...
How to Find And Replace Text In A File With C#
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@Alexander Right. One chunk ends with "...som", and the next begins with "e text...". Makes it a much more complicated problem.
– djv
May 16 '16 at 20:11
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Seeking clarification on apparent contradictions regarding weakly typed languages
...quired to enforce or merely encourage type restrictions. As I pointed out, one could reasonably say that C# is strongly typed because it allows and encourages static typing, and one could just as reasonably say that it is weakly typed because it allows the possibility to violate type safety.
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Is there an IDictionary implementation that, on missing key, returns the default value instead of th
... decided this was good enough to add to System.Collections.Generic.CollectionExtensions, as I just tried and it's there.
– theMayer
Feb 21 '19 at 19:43
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When to use -retainCount?
...don't use -retainCount. It's a truly worthless method.
edit
Please everyone go to http://bugreport.apple.com and request that -retainCount be deprecated. The more people that ask for it, the better.
edit #2
As an update,[NSNumber numberWithInt:1] now has a retainCount of 9223372036854775807. ...