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How to persist a property of type List in JPA?
... String> {
private static final String SPLIT_CHAR = ";";
@Override
public String convertToDatabaseColumn(List<String> stringList) {
return String.join(SPLIT_CHAR, stringList);
}
@Override
public List<String> convertToEntityAttribute(String string) {
...
How do I validate a date string format in python?
...('2003-12-23')
>>> validate('2003-12-32')
Traceback (most recent call last):
File "<pyshell#20>", line 1, in <module>
validate('2003-12-32')
File "<pyshell#18>", line 5, in validate
raise ValueError("Incorrect data format, should be YYYY-MM-DD")
ValueError: In...
When to use .First and when to use .FirstOrDefault with LINQ?
... @driis - I'd imagine we can use the mantra of the exceptional exception guideline when choosing between First and FirstOrDefault. Thanks for the clear answer.
– Metro Smurf
Jun 21 '09 at 21:21
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JsonMappingException: No suitable constructor found for type [simple type, class ]: can not instanti
...
@Suman I would not call this a dummy constructor - it's just the default constructor. Not only is it perfectly valid, but is required for many kinds of java bean-type processing. (And, of course, it tripped me up. :-) )
– ...
Check if checkbox is checked with jQuery
How can I check if a checkbox in a checkbox array is checked using the id of the checkbox array?
23 Answers
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When to use window.opener / window.parent / window.top
...
window.opener refers to the window that called window.open( ... ) to open the window from which it's called
window.parent refers to the parent of a window in a <frame> or <iframe>
window.top refers to the top-most window from a window nested in one or m...
Jenkins Host key verification failed
...tal: The remote end hung up unexpectedly
– A. M. Mérida
Mar 4 '13 at 8:40
6
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PHP & mySQL: Year 2038 Bug: What is it? How to solve it?
...can we do to the existing applications that use TIMESTAMP, to avoid the so-called problem, when it really occurs?
Few PHP applications will still be around in 2038, though it's hard to foresee as the web hardly a legacy platform yet.
Here is a process for altering a database table column to conver...
How are 3D games so efficient? [closed]
...t's common for demos of graphics APIs (like dxdemo) to fall back to what's called a software renderer when your hardware doesn't support all of the features needed to show a pretty example. These features might include things like shadows, reflection, ray-tracing, physics, et cetera.
This mimics th...
廉价共享存储解决方案2-drbd+cman+gfs2 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...lic/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa):
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/id_rsa.pub.
The key fingerprint is:
a9:8a:3a:3d:64:eb:0b:de:94:a5:92:e4:ba:5d:f3:de root@gfs_1
The key's rand...