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@UniqueConstraint and @Column(unique = true) in hibernate annotation
....id = 1 and tries to insert another record with mask.id = 1, you'll get an error, because that column should have unique values. The same aplies for group.
On the other hand,
@Table(
name = "product_serial_group_mask",
uniqueConstraints = {@UniqueConstraint(columnNames = {"mask", "group"})}...
Moment.js: Date between dates
...is calculation always ignores the year. For example, If I give startDate ='05-01-2019', endDate = '05-31-2019' and date as '05-21-2017', it will give me result as "Yay", although it is false.
– Aakash Maurya
May 9 '19 at 8:44
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What makes JNI calls slow?
...s are specified in strings and queried from the JVM. This is both slow and error-prone.
Java Strings are objects, have length and are encoded. Accessing or creating a string may require an O(n) copy.
Some additional discussion, possibly dated, can be found in "Java¿ Platform Performance: Strategi...
What are the differences between various threading synchronization options in C#?
...ation detail and not relevant. By returning a TCS, you can return results, errors or handle cancellation and it's easily composable with other async operation (such as async await or ContinueWith).
– Simon Gillbee
Aug 13 '15 at 20:13
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How do I vertically center UITextField Text?
... if it's just numbers
So, unfortunately, it may need a bit of trial and error and manual adjustment to get it looking visually correct.
I placed the below code in a subclass of UITextField. It calls superclass methods as this takes into account the clear button being present.
override func awak...
What are the calling conventions for UNIX & Linux system calls (and user-space functions) on i386 an
... the system-call. A value in the range between -4095 and -1 indicates
an error, it is -errno.
Only values of class INTEGER or class MEMORY are passed to the kernel.
Remember this is from the Linux-specific appendix to the ABI, and even for Linux it's informative not normative. (But it is ...
sqlalchemy flush() and get inserted id?
...ing closer to an answer that might work for me but I receive the following error: InvalidRequestError: Could not refresh instance '<....>'. It appears after the flush that the instance simply no longer exists. Appreciate any insight.
– PlaidFan
Dec 21 ...
Formatting NSDate into particular styles for both year, month, day, and hour, minute, seconds
...Rob Napier
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Matplotlib different size subplots
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I am getting this error ValueError: Expected the given number of height ratios to match the number of rows of the grid. I solved it by saying {'width_ratios':[1]} for 1 row, etc.
– Markus Weber
Mar 22 '19...
Detect Windows version in .net
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What about the getOSArchitecture() method? Error: "The name 'getOSArchitecture' does not exist in the current context."
– Lonnie Best
May 21 '10 at 21:08
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