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OSGi, Java Modularity and Jigsaw
...Jigsaw is probably necessary for the JRE only, but that it will create far more problems than it claims to solve if used by other Java libraries or apps.
The JRE is a very difficult and special case. It is over 12 years old and is a frightful mess, riddled with dependency cycles and nonsensical dep...
How exactly do Django content types work?
..., now we're going to take a close look at our models and rework them to be more "reusable" and intuitive. Let's start by getting rid of the two foreign keys on our Comment model and replace them with a GenericForeignKey.
# ourapp.models
from django.contrib.contenttypes.fields import GenericForeign...
How can I convert a long to int in Java?
...it integer with the same 32 lower order bits. With objects, you cast to a more specific child class, but with primitve types, a cast is not really a cast, but a conversion.
– dspyz
Dec 6 '10 at 18:09
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Can a project have multiple origins?
Can a project have two (or more) "origins" in Git?
7 Answers
7
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Why can't strings be mutable in Java and .NET?
...ment, and use than mutable classes. They are less prone
to error and are more secure.
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"Immutable objects are simple. An immutable object can be in
exactly one state, the state in which it was created. If you make sure
that all constructors establish class invariants, then it is...
Significant new inventions in computing since 1980
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Python ValueError: too many values to unpack [duplicate]
...terating over just the keys (which are strings).
Since self.materials has more than two keys*, they can't be unpacked into the tuple "k, m", hence the ValueError exception is raised.
In Python 2.x, to iterate over the keys and the values (the tuple "k, m"), we use self.materials.iteritems().
Howe...
How to get last N records with activerecord?
... That was the other method I was thinking of, but that seems like even more work since that's 2 queries against the database instead of 1. I guess I assume that you need to iterate over the array at some point, so you could let ruby sort it at at that time. (ie. records.reverse.each do ..)
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Namespace + functions versus static methods on a class
...ve a lower encapsulation value than namespaces. And isolating data is even more important in threaded execution.
– paercebal
Feb 17 '12 at 17:41
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Use JavaScript to place cursor at end of text in text input element
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