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In Hibernate Validator 4.1+, what is the difference between @NotNull, @NotEmpty, and @NotBlank?
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@NotEmpty: The CharSequence, Collection, Map or Array object is not null and size > 0.
@NotBlank: The string is not null and the trimmed length is greater than zero.
To help you understand, let's look into how these constraints are defined and carried out (I'm using version 4.1):
The @Not...
How can I prevent Visual Studio 2013 from closing my IIS Express app when I end debugging?
Previously in 2012, if I debugged in Chrome (for example), and then stopped the debugger, the website would remain running in IIS Express. This no longer seems to be the case in 2013.
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Spring Data: “delete by” is supported?
...ing JPA for database access. I am able to find examples such as findByName and countByName, for which I dont have to write any method implementation. I am hoping to find examples for delete a group of records based on some condition.
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Why does one hot encoding improve machine learning performance?
...ced that when One Hot encoding is used on a particular data set (a matrix) and used as training data for learning algorithms, it gives significantly better results with respect to prediction accuracy, compared to using the original matrix itself as training data. How does this performance increase h...
Maven plugins can not be found in IntelliJ
...ment -> Build Tools -> Maven (IntelliJ Ultimate 2020.2 on Ubuntu)... and then I needed to invalidate caches and restart (File -> Invalid Caches / Restart). Problem solved, thank you!
– Lambart
Aug 20 at 21:25
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JavaScript - onClick to get the ID of the clicked button
...l reference exception using JQuery's event.target.id (for me, both Firefox and IE were throwing it), this is a great solution that works in all three major browsers.
– X3074861X
Aug 8 '13 at 16:30
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Python (and Python C API): __new__ versus __init__
...stion I'm about to ask seems to be a duplicate of Python's use of __new__ and __init__? , but regardless, it's still unclear to me exactly what the practical difference between __new__ and __init__ is.
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public friend swap member function
In the beautiful answer to the copy-and-swap-idiom there is a piece of code I need a bit of help:
2 Answers
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How to read from a file or STDIN in Bash?
...e following Perl script ( my.pl ) can read from either the file on the command line args or from STDIN:
15 Answers
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Is there Unicode glyph Symbol to represent “Search” [closed]
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There is U+1F50D LEFT-POINTING MAGNIFYING GLASS (????) and U+1F50E RIGHT-POINTING MAGNIFYING GLASS (????).
You should use (in HTML) 🔍 or 🔎
They are, however not supported by many fonts (fileformat.info only lists a few fonts as supporting the Codepoint w...