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Quickest way to compare two generic lists for differences
...2.Except(list1).ToList();
I suspect there are approaches which would actually be marginally faster than this, but even this will be vastly faster than your O(N * M) approach.
If you want to combine these, you could create a method with the above and then a return statement:
return !firstNotSecon...
'this' vs $scope in AngularJS controllers
...rs?"
Short answer:
this
When the controller constructor function is called, this is the controller.
When a function defined on a $scope object is called, this is the "scope in effect when the function was called". This may (or may not!) be the $scope that the function is defined on. So, insi...
How do I stop Entity Framework from trying to save/insert child objects?
When I save an entity with entity framework, I naturally assumed it would only try to save the specified entity. However, it is also trying to save that entity's child entities. This is causing all sorts of integrity problems. How do I force EF to only save the entity I want to save and therefore ig...
Use cases for the 'setdefault' dict method
...e case: Grouping items (in unsorted data, else use itertools.groupby)
# really verbose
new = {}
for (key, value) in data:
if key in new:
new[key].append( value )
else:
new[key] = [value]
# easy with setdefault
new = {}
for (key, value) in data:
group = new.setdefault(k...
How can I calculate the difference between two dates?
...
Not all days have 86400 seconds. For a trivial example that's fine but it's not a good idea in the real world. DST changes, leap seconds, etc can all mess with it. NSCalendar can tell you how many seconds are in a given day.
...
'\r': command not found - .bashrc / .bash_profile [duplicate]
...
When all else fails in Cygwin...
Try running the dos2unix command on the file in question.
It might help when you see error messages like this:
-bash: '\r': command not found
Windows style newline characters can cause issues ...
Why does Hibernate require no argument constructor?
...objects without invoking the constructor. But this is not available across all VMs. For example, XStream can create instances of objects that don't have a public no-arg constructor, but only by running in a so-called "enhanced" mode which is available only on certain VMs. (See the link for details.)...
Where does the @Transactional annotation belong?
...r their methods or is it better to annotate the Service classes which are calling using the DAO objects? Or does it make sense to annotate both "layers"?
...
Get escaped URL parameter
... you may want "decodeURIComponent()" instead of "decodeURI()", especially if you are passing interesting data like return URLs in as a URL parameter
– perfectionist
Feb 27 '12 at 13:14
...
Should I inherit from std::exception?
... just catch the std::exception.
Edit: as Martin and others noted, you actually want to derive from one of the sub-classes of std::exception declared in <stdexcept> header.
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