大约有 40,000 项符合查询结果（耗时：0.0583秒） [XML]
Difference between Repository and Service Layer?
...mple service could look like:
public interface IUserService
{
User GetByUserName(string userName);
string GetUserNameByEmail(string email);
bool EditBasicUserData(User user);
User GetUserByID(int id);
bool DeleteUser(int id);
IQueryable<User> ListUsers();
bool Chan...
SQL select join: is it possible to prefix all columns as 'prefix.*'?
...ma.html
Otherwise all I can recommend is to fetch columns in a result set by ordinal position rather than by column name, if it's too much trouble for you to type the names of the columns in your query.
This is a good example of why it's bad practice to use SELECT * -- because eventually you'll ha...
How can I access and process nested objects, arrays or JSON?
...ts, i.e. its values are arrays or objects. Such structures can be accessed by consecutively applying dot or bracket notation.
Here is an example:
const data = {
code: 42,
items: [{
id: 1,
name: 'foo'
}, {
id: 2,
name: 'bar'
}]
};
Let's assume we w...
android.view.InflateException: Binary XML file: Error inflating class fragment
...vity_main.
In my case, the root cause exception turned out to be
Caused by: android.content.res.Resources$NotFoundException: Resource
"com.example.myapp:drawable/details_view" (7f02006f) is not a
Drawable (color or path): TypedValue{t=0x1/d=0x7f02006f a=-1
r=0x7f02006f}
This exception...
Is a one column table good design? [closed]
...nce of one column tables are justified.
Edited in response to the comment by: Quassnoi
(source: ggpht.com)
In this schema I can define a foreign key in the table company_factories that does not require me to include Language column on the table, but if I don't have the table countries_id, I m...
Hidden Features of MySQL
.... a web site without persistent connections) you might improve performance by setting thread_cache_size to a non-zero value. 16 is good value to start with. Increase the value until your threads_created do not grow very quickly.
PRIMARY KEY:
There can be only one AUTO_INCREMENT column per table, i...
Is it possible to start a shell session in a running container (without ssh)
...commend against this.
notice: -notrunc is deprecated, it will be replaced by --no-trunc soon.
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Pandas aggregate count distinct
...-02 15 0002
4 2013-04-02 30 0002
>>> df.groupby("date").agg({"duration": np.sum, "user_id": pd.Series.nunique})
duration user_id
date
2013-04-01 65 2
2013-04-02 45 1
>>> df.groupby("date").agg({"...
JPA EntityManager: Why use persist() over merge()?
...rsist() semantics:
It makes sure that you are inserting and not updating by mistake.
Example:
{
AnyEntity newEntity;
AnyEntity nonAttachedEntity;
AnyEntity attachedEntity;
// Create a new entity and persist it
newEntity = new AnyEntity();
em.persist(newEntity);
...
Cookie overflow in rails application?
...nto text for writing to the cookie its probably bigger than that limit.
Ruby on Rails ActionDispatch::Cookies::CookieOverflow error
That way this CookieOverflow Error occurs.
The easiest way to solve this one is, you need change your session_store and don't use the cookie_store. You can use the a...