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How do I execute a program using Maven?
...
In order to execute multiple programs, I also needed a profiles section:
<profiles>
<profile>
<id>traverse</id>
<activation>
<property>
<name>traverse</name>...
Rails “validates_uniqueness_of” Case Sensitivity
...hreaded server. That's because you might get this sequence of events (the order is important):
Process A gets a request to create a new user with the name 'foo'
Process B does the same thing
Process A validates the uniqueness of 'foo' by asking the DB if that name exists yet and the DB says the n...
Simplest way to wait some asynchronous tasks complete, in Javascript?
... be the recommended way of structuring several async calls in the required order going forward I guess.
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When to use a Content Provider
...e 5 tables in your database, but you need to join a few of them in certain orders before using them. And make a content URI for each of these joins. You could then each use these URIs as a table :)
I suggest you go ahead with Content Provider, you'll be amazed to see how powerful it is.
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What is the difference between `raise “foo”` and `raise Exception.new(“foo”)`?
...xception in your code, this code will not catch it:
begin
rescue
end
In order to catch the Exception you will have to do this:
begin
rescue Exception
end
This means that in a sense, an Exception is a "worse" error than a RuntimeError, because you have to do more work to recover from it.
So wh...
Can modules have properties the same way that objects can?
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I would do this in order to properly inherit all the attributes of a module, and be correctly identified by isinstance()
import types
class MyModule(types.ModuleType):
@property
def y(self):
return 5
>>> a=MyModule(...
Why does Python code use len() function instead of a length method?
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len, str, etc. can be used with higher-order functions like map, reduce, and filter without the need to define a function or lambda just to call a method. Not everything revolves around OOP, even in Python.
– Evicatos
Nov 7 '...
Best exception for an invalid generic type argument
...ons using ildasm/ilasm ...
... it seems like a new Exception might be in order despite the high burden of proof we justly have to meet before creating custom Exceptions. Something like InvalidTypeParameterException might be useful throughout the library (or maybe not - this is surely an edge case...
Custom Python list sorting
...d if each number contained in the string is encoded using an encoding that orders the numbers lexicographically, such as Levenshtein coding. But I consider this more as a workaround to the fact that sort doesn’t take a comparison function as argument in Python 3, and not as something that I actual...
How to specify an element after which to wrap in css flexbox? [duplicate]
...ses the complexity of both the HTML and CSS and, sadly, frequently renders order useless. Similarly, forcing the width of an item to 100% reduces the "responsive" potential of the flex layout or requires a lot of highly specific queries or count selectors (e.g. the techniques that may accomplish the...