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Determine if a sequence contains all elements of another sequence using Linq [duplicate]
...nt> hashSet = new HashSet<int>(superset);
bool contained = subset.All(i => hashSet.Contains(i));
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Setting the filter to an OpenFileDialog to allow the typical image formats?
I have this code, how can I allow it to accept all typical image formats? PNG, JPEG, JPG, GIF?
11 Answers
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Where should virtualenvs be created?
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Many people use the virtualenvwrapper tool, which keeps all virtualenvs in the same place (the ~/.virtualenvs directory) and allows shortcuts for creating and keeping them there. For example, you might do:
mkvirtualenv djangoproject
and then later:
workon djangoproject
It's ...
Get OS-level system information
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You can get some limited memory information from the Runtime class. It really isn't exactly what you are looking for, but I thought I would provide it for the sake of completeness. Here is a small example. Edit: You can also get disk usage information from the java.io.File class. The disk space us...
Duplicate and rename Xcode project & associated folders [closed]
...the associated files without Xcode going mental, and without having to manually re-import all files to the project.
9 Answe...
How do I (or can I) SELECT DISTINCT on multiple columns?
I need to retrieve all rows from a table where 2 columns combined are all different. So I want all the sales that do not have any other sales that happened on the same day for the same price. The sales that are unique based on day and price will get updated to an active status.
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JOIN two SELECT statement results
...COUNT(*) AS '# Late' FROM Table WHERE Age > Palt GROUP BY ks
Or UNION ALL if you want duplicates:
SELECT ks, COUNT(*) AS '# Tasks' FROM Table GROUP BY ks
UNION ALL
SELECT ks, COUNT(*) AS '# Late' FROM Table WHERE Age > Palt GROUP BY ks
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Do python projects need a MANIFEST.in, and what should be in it?
...oth, distutils and setuptools are including in source
distribution package all the files mentioned in setup.py - modules, package python files,
README.txt and test/test*.py. If this is all you want to have in distribution package, you do
not have to use MANIFEST.in.
If you want to manipulate (add o...
Why do we need fibers
...Ruby class in Ruby 1.9. These are incredibly useful.
In Ruby 1.9, if you call almost any iterator method on the core classes, without passing a block, it will return an Enumerator.
irb(main):001:0> [1,2,3].reverse_each
=> #<Enumerator: [1, 2, 3]:reverse_each>
irb(main):002:0> "abc"....
What is the right way to check for a null string in Objective-C?
...that people who are new to Objective C have trouble getting used to, especially coming form other languages where messages/method calls to nil crash.
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