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@Override is not allowed when implementing interface method
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Select Java Compiler
Select module in the table
Change the byte-code version to map what you selected in the previous step for language-level
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How does the socket API accept() function work?
...g on the Server IP maintains a database (meaning I don't care what kind of table/list/tree/array/magic data structure it uses) of active sockets and listens on the Server Port. When it receives a message (via the server's TCP/IP stack), it checks the Client IP and Port against the database. If the...
What is the difference between a database and a data warehouse?
... as Data Warehousing. This records the data from the user for history.
The tables and joins are complex since they are normalized (for RDMS). This is done to reduce redundant data and to save storage space.
Entity – Relational modeling techniques are used for RDMS database design.
Optimized for wr...
JPA - Returning an auto generated id after persist()
... Its not working giving zero as a Return after persisting the data into table. either refresh is not working at this case .. What should i do for this. please suggest a way... Thank you
– Vikrant Kashyap
Jun 13 '16 at 6:57
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How to make a floated div 100% height of its parent?
...ion, and even if you have several floated child elements, it seems an acceptable drawback to style their offset absolutely positioned. +1
– kontur
Jul 7 '14 at 11:26
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Comparing date ranges
... |-----| equal start with end of comparison period
If your table has columns called range_end and range_start, here's some simple SQL to retrieve all the matching rows:
SELECT *
FROM periods
WHERE NOT (range_start > @check_period_end
OR range_end < @check_period_s...
Swift native base class or NSObject
...r by using the '@objc' decoration. Otherwise it will follow a static- and vtable-dispatch style, like C++.
6 Answers
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What is lazy loading in Hibernate?
...e child when parent is loaded from the database.
Example :
If you have a TABLE ? EMPLOYEE mapped to Employee object and contains set of Address objects.
Parent Class : Employee class,
Child class : Address Class
public class Employee {
private Set address = new HashSet(); // contains set of ch...
Trim string in JavaScript?
...pt-5-support-and-more.aspx
Chrome: 5+
Opera: 10.5+
ECMAScript 5 Support Table: http://kangax.github.com/es5-compat-table/
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What does SQL clause “GROUP BY 1” mean?
...d name, you may also group by ordinal, or position of the field within the table. 1 corresponds to the first field (regardless of name), 2 is the second, and so on.
This is generally ill-advised if you're grouping on something specific, since the table/view structure may change. Additionally, it ma...