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Max or Default?
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Although DefaultIfEmpty is now implemented in LINQ to SQL, this answer remains better IMO, as using DefaultIfEmpty results in a SQL statement 'SELECT MyCounter' that returns a row for every value being summed, whereas this answer results in MAX(MyCount...
How to persist a property of type List in JPA?
...tring) {
return Arrays.asList(string.split(SPLIT_CHAR));
}
}
Now use it on your Entities like this:
@Convert(converter = StringListConverter.class)
private List<String> yourList;
In the database your list will be stored as foo;bar;foobar and in your Java object you will get a ...
Understanding generators in Python
...u do not look into until you understand the basic concept of a generator.
Now you may ask: why use generators? There are a couple of good reasons:
Certain concepts can be described much more succinctly using generators.
Instead of creating a function which returns a list of values, one can write ...
What is the relationship between Looper, Handler and MessageQueue in Android?
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It's widely known that it's illegal to update UI components directly from threads other than main thread in android. This android document (Handling Expensive Operations in the UI Thread) suggests the steps to follow if we need to start a...
What to do with commit made in a detached head
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I know this is years later, but thanks for this answer. I didn't consider myself done searching with the accepted answer here because I didn't want to leave around a temporary branch and this answer has the command to delete it....
How to install the JDK on Ubuntu Linux
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As of March 2019 the ppa was disabled and now 99% of the answer regarding this issue around the internet cannot be used anymore.
– Tobbey
Apr 29 '19 at 12:35
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Uses for Optional
Having been using Java 8 now for 6+ months or so, I'm pretty happy with the new API changes. One area I'm still not confident in is when to use Optional . I seem to swing between wanting to use it everywhere something may be null , and nowhere at all.
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How to check String in response body with mockMvc
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@SotiriosDelimanolis is correct...I'm looking right now at the JSON returned by getContentAsString() that came from my @RestController-annotated controller.
– Paul
Dec 10 '14 at 18:57
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How do I install and use curl on Windows?
... needed. Close open console windows and reopen, so they get the new PATH.
Now enjoy typing curl at any command prompt. Party time!
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What is the correct way to restore a deleted file from SVN?
I deleted a file from a repo and now want to put it back. The best I can figure out is to:
9 Answers
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