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How to map calculated properties with JPA and Hibernate
...read: Hibernate Derived Properties - Performance and Portability.
Without more details, I can't give a more precise answer but the above link should be helpful.
See also:
Section 5.1.22. Column and formula elements (Hibernate Core documentation)
Section 2.4.3.1. Formula (Hibernate Annotations do...
npm install vs. update - what's the difference?
...ev flag is added
Why use npm install at all?
Because npm install does more when you look besides handling your dependencies in package.json.
As you can see in npm install you can ...
manually install node-modules
set them as global (which puts them in the shell's PATH) using npm install -g &l...
Add UIPickerView & a Button in Action sheet - How?
...
A much more elegant solution IMHO is to set your textfield's input view to UIPickerView and its accessory to UIToolbar. You can check out the QuickDialog project for an example.
– Steve Moser
J...
Difference between using bean id and name in Spring configuration file
...From the Spring reference, 3.2.3.1 Naming Beans:
Every bean has one or more ids (also
called identifiers, or names; these
terms refer to the same thing). These
ids must be unique within the
container the bean is hosted in. A
bean will almost always have only one
id, but if a bean has...
Searching subversion history (full text)
... can take a while depending on the size of your repository. For me it took more than an hour.
– user247702
Aug 7 '15 at 16:31
21
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vector::at vs. vector::operator[]
... case" option rather than at() everywhere. That way you can hope for a bit more performance in release mode, just in case you ever need it.
– Steve Jessop
Feb 21 '12 at 11:01
...
What's the difference between utf8_general_ci and utf8_unicode_ci?
...icode or _general. Much of what's written below is not of much interest anymore if you can use one of the newer collations instead.
Key differences
utf8mb4_unicode_ci is based on the official Unicode rules for universal sorting and comparison, which sorts accurately in a wide range of languages.
u...
Most efficient way to concatenate strings?
...nd that, when executing 1000 concatenations or less, String.Join() is even more efficient than StringBuilder.
StringBuilder sb = new StringBuilder();
sb.Append(someString);
The only problem with String.Join is that you have to concatenate the strings with a common delimiter.
Edit: as @ryanversaw...
How do I check if string contains substring? [duplicate]
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