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Data structure: insert, remove, contains, get random element, all at O(1)
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How do I update/upsert a document in Mongoose?
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444
Mongoose now supports this natively with findOneAndUpdate (calls MongoDB findAndModify).
The...
ASP.NET MVC: No parameterless constructor defined for this object
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answered Sep 1 '10 at 21:46
SandRockSandRock
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Does Java have a HashMap with reverse lookup?
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edited Feb 6 '14 at 13:05
dARKpRINCE
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Visual Studio 2010 shortcut to find classes and methods?
...Callum Watkins
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answered Jul 17 '10 at 18:42
driisdriis
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Show constraints on tables command
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424
I use
SHOW CREATE TABLE mytable;
This shows you the SQL statement necessary to receate myta...
Visual Studio 2013 IntelliSense stops working for ASP.NET MVC5 Controllers
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answered Jun 1 '14 at 19:57
Rush FrisbyRush Frisby
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How to get the instance id from within an ec2 instance?
...See the EC2 documentation on the subject.
Run:
wget -q -O - http://169.254.169.254/latest/meta-data/instance-id
If you need programatic access to the instance ID from within a script,
die() { status=$1; shift; echo "FATAL: $*"; exit $status; }
EC2_INSTANCE_ID="`wget -q -O - http://169.254.169.2...
In which language are the Java compiler and JVM written?
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174
The precise phrasing of the question is slightly misleading: it is not "the JVM" or "the compile...