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In Hibernate Validator 4.1+, what is the difference between @NotNull, @NotEmpty, and @NotBlank?
...o this constraint uses the @NotNull constraint above, and @Size whose definition differs based on the object but should be self explanitory.
Finally, the @NotBlank constraint is defined as:
@NotNull
@Constraint(validatedBy = {NotBlankValidator.class})
So this constraint also uses th...
JavaScript “new Array(n)” and “Array.prototype.map” weirdness
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It appears that the first example
x = new Array(3);
Creates an array with undefined pointers.
And the second creates an array with pointers to 3 undefined objects, in this case the pointers them self are NOT undefined, on...
When to use “ON UPDATE CASCADE”
...regularly but I never use "ON UPDATE CASCADE" as I am not so sure in what situation it will be useful.
7 Answers
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What is the difference between C# and .NET?
...difference between C# and .NET? When I think of C#, right away I would say it is a .NET language, but when I search for job posts, they require candidates to have C# and .NET experience. Can someone give me an explanation?
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Text blinking jQuery
What is an easy way to make text blinking in jQuery and a way to stop it? Must work for IE, FF and Chrome. Thanks
35 Answer...
hexadecimal string to byte array in python
...ex String into a byte array so that I can shift each value out and convert it into its proper data type.
8 Answers
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Is there ever a time where using a database 1:1 relationship makes sense?
I was thinking the other day on normalization, and it occurred to me, I cannot think of a time where there should be a 1:1 relationship in a database.
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Checking network connection
...the IP addresses for google.com. Change http://216.58.192.142 to whatever site can be expected to respond quickly.
This fixed IP will not map to google.com forever. So this code is
not robust -- it will need constant maintenance to keep it working.
The reason why the code above uses a fixed IP a...
time.sleep — sleeps thread or process?
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It blocks the thread. If you look in Modules/timemodule.c in the Python source, you'll see that in the call to floatsleep(), the substantive part of the sleep operation is wrapped in a Py_BEGIN_ALLOW_THREADS and Py_END_ALLOW...
Error 330 (net::ERR_CONTENT_DECODING_FAILED):
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It happens when your HTTP request's headers claim that the content is gzip encoded, but it isn't.
Turn off gzip encoding setting or make sure the content is in fact encoded.
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