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What is a plain English explanation of “Big O” notation?
... have polynomial complexity or is solvable in polynomial time.
O(n), O(n2) etc. are all polynomial time. Some problems cannot be solved in polynomial time. Certain things are used in the world because of this. Public Key Cryptography is a prime example. It is computationally hard to find two prime f...
Visual Studio Copy Project
...uld rather not start doing it from scratch by adding files and references, etc. Please note that I don't mean copy for deployment. Just plain copy.
...
Should services always return DTOs, or can they also return domain models?
...ax)
Project lifetime is 2 years or so.
No separate team for GUI, backend, etc.
Arguments Against DTO
Duplication of code.
Cost of development time, debugging. (use DTO generation tools http://entitiestodtos.codeplex.com/)
You must synchronize both models all the time.
Cost of developement: Ad...
Unable to Cast from Parent Class to Child Class
... what if he wants a dog that's the same eye color/weight/hair pattern/age, etc as the cat that's being held in the mammal object? Essentially copying the common properties.
– FastAl
Jun 18 '10 at 14:02
...
what is the difference between XSD and WSDL
... code to make complete use of the given XSD and make Web Service calls to fetch data from servicer and convert data returned into their suitable requirement and then display or publish data or information about the product on their website. A simple example would be FLIGHT Ticket booking. An airline...
Center content of UIScrollView when smaller
... more jerky than using Liam's NYOBetterZoom. Maybe it depend on image size etc. The moral; use the solution that best suits your needs
– wuf810
Apr 15 '11 at 10:36
2
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Difference between Node object and Element object?
... are many other types of nodes (text nodes, comment nodes, document nodes, etc...).
The DOM consists of a hierarchy of nodes where each node can have a parent, a list of child nodes and a nextSibling and previousSibling. That structure forms a tree-like hierarchy. The document node would have its...
What do the makefile symbols $@ and $< mean?
...icate filenames removed since for most uses, such as
compiling, copying, etc., duplicates are not wanted.
$+: Similar to $^, this is the names of all the prerequisites separated
by spaces, except that $+ includes duplicates. This variable was
created for specific situations such as arguments...
How do I use the lines of a file as arguments of a command?
...ne argument in quotes so that it can contain whitespace, escape sequences, etc., reading from the file will not do the same thing. For example, if your file contains:
a "b c" d
the arguments you will get are:
a
"b
c"
d
If you want to pull each line as an argument, use the while/read/do constru...
MongoDB with redis
...s associated operations (union, intersection, difference on multiple sets, etc ...). It is quite easy to implement a basic faceted search or tagging engine on top of this feature, which is an interesting addition to MongoDB more traditional indexing capabilities.
Redis supports efficient blocking po...