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When to use EntityManager.find() vs EntityManager.getReference() with JPA
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@Arthur Ronald what happens if there is a Version annotation in the entity called by getReference?
– David Hofmann
Mar 25 '16 at 13:28
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Remove columns from dataframe where ALL values are NA
...nswered May 14 '19 at 21:48
André.BAndré.B
30433 silver badges1414 bronze badges
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Manual deployment vs. Amazon Elastic Beanstalk
...nstance and setting up tomcat server and deploy etc for a typical java web applicaion. Are load balancing, Monitoring and autoscaling the only advantages?
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One-liner to check whether an iterator yields at least one element?
... Thanks, I think I'm going to use next().
– Bastien Léonard
Jun 24 '10 at 23:07
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@Bastien, fine...
Why is React's concept of Virtual DOM said to be more performant than dirty model checking?
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Here's a comment by React team member Sebastian Markbåge which sheds some light:
React does the diffing on the output (which is a known serializable format, DOM attributes). This means that the source data can be of any format. It can be immutable data structures and state in...
What's the reason I can't create generic array types in Java?
...r second example may throw a ClassCastException
– José Roberto Araújo Júnior
Jan 31 '14 at 2:27
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C++ IDE for Linux? [closed]
...ng support (etc) for C++ is so minimal anyway (even in IDEs), this doesn't apply to C++.
– Konrad Rudolph
Jun 10 '09 at 13:56
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Why do we need private subnet in VPC?
...outbound access to the Internet. This is where Network Address Translation² and a NAT instance come in.
The machines on a private subnet can access the Internet because the default route on a private subnet is not the VPC "Internet Gateway" object -- it is an EC2 instance configured as a NAT in...
Retrieving the last record in each group - MySQL
There is a table messages that contains data as shown below:
27 Answers
27
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How do I get an animated gif to work in WPF?
...tialize()
{
_gifDecoder = new GifBitmapDecoder(new Uri("pack://application:,,," + this.GifSource), BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.Default);
_animation = new Int32Animation(0, _gifDecoder.Frames.Count - 1, new Duration(new TimeSpan(0, 0, 0, _gifDecoder....