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Check if value exists in Postgres array
...is works great. It has a side effect of automatic casting. Ex: SELECT 1::smallint = ANY ('{1,2,3}'::int[]) works. Just make sure to put ANY() on the right side of expression.
– Mike Starov
Jun 27 '12 at 23:52
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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...
Is XSLT worth it? [closed]
...is can lead to "unfortunate moments" when novices design code, then frantically search the web for hints how to implement functions they assumed would just be there and didn't give themselves time to write.
Functional language.
One way to get procedural behaviour, by the way, is to chain multiple ...
How do I create a namespace package in Python?
In Python, a namespace package allows you to spread Python code among several projects. This is useful when you want to release related libraries as separate downloads. For example, with the directories Package-1 and Package-2 in PYTHONPATH ,
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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?
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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.
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'\r': command not found - .bashrc / .bash_profile [duplicate]
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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 ...
How to split a string into a list?
...d, it might be a typo, but you have your loop a little messed up. If you really did want to use append, it would be:
words.append(word)
not
word.append(words)
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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"?
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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
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