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PersistentObjectException: detached entity passed to persist thrown by JPA and Hibernate
... to the corresponding getters. A big word of caution is not to mix "Field" and "Property" access types within the entity class otherwise the behavior is undefined by the JSR-317 specifications.
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Expand a random range from 1–5 to 1–7
Given a function which produces a random integer in the range 1 to 5, write a function which produces a random integer in the range 1 to 7.
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Private vs Protected - Visibility Good-Practice Concern [closed]
I've been searching and I know the theoretic difference.
6 Answers
6
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What does the “yield” keyword do?
What is the use of the yield keyword in Python, and what does it do?
42 Answers
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How to think in data stores instead of databases?
As an example, Google App Engine uses Google Datastore, not a standard database, to store data. Does anybody have any tips for using Google Datastore instead of databases? It seems I've trained my mind to think 100% in object relationships that map directly to table structures, and now it's hard t...
Autolayout - intrinsic size of UIButton does not include title insets
...on width is derived from the title width plus the icon width plus the left and right content edge insets.
If a button has both an image and text, they’re centered as a group, with no padding between.
If you add a left content inset, it’s calculated relative to the text, not the text + icon.
If y...
Why must wait() always be in synchronized block
... to explicitly acquire the monitor by making particular block synchronized and then release the monitor by calling wait() ?
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What is the difference between Factory and Strategy patterns?
Can any one explain the difference between factory and strategy patterns?
12 Answers
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How to store a list in a column of a database table
...ould create another table that effectively holds the elements of said list and then link to it directly or through a junction table. However, the type of list I want to create will be composed of unique items (unlike the linked question's fruit example). Furthermore, the items in my list are exp...
Batch script: how to check for admin rights
...erything except Windows 8. Running AT on Windows 8 results in:
The AT command has been deprecated. Please use schtasks.exe instead.
The request is not supported.
(see screenshot #1) and will return %errorLevel% 1.
Research
So, I went searching for other commands that require elevated permi...