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How to prevent buttons from submitting forms
In the following page, with Firefox the remove button submits the form, but the add button does not.
17 Answers
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How do I sort a list by different parameters at different timed
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I think your enum approach is basically sound, but the switch statements really need a more object oriented approach. Consider:
enum PersonComparator implements Comparator<Person> {
ID_SORT {
public int compare...
How to open the Google Play Store directly from my Android application?
I have open the Google Play store using the following code
23 Answers
23
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Get size of all tables in database
I have inherited a fairly large SQL Server database. It seems to take up more space than I would expect, given the data it contains.
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Convert JSON String to JSON Object c#
I have this String stored in my database:
8 Answers
8
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MongoDB, remove object from array
...ed Mar 26 '13 at 16:09
sambomartinsambomartin
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How to perform a real time search and filter on a HTML table
I've been Googling and searching Stack Overflow for a while, but I just can't get around this problem.
9 Answers
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How should equals and hashcode be implemented when using JPA and Hibernate
How should model class's equals and hashcode be implemented in Hibernate? What are the common pitfalls? Is the default implementation good enough for most cases? Is there any sense to use business keys?
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Foreign Key to non-primary key
I have a table which holds data, and one of those rows needs to exist in another table. So, I want a foreign key to maintain referential integrity.
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'IF' in 'SELECT' statement - choose output value based on column values
...unctions.html.
Additionally, you could handle when the condition is null. In the case of a null amount:
SELECT id,
IF(type = 'P', IFNULL(amount,0), IFNULL(amount,0) * -1) as amount
FROM report
The part IFNULL(amount,0) means when amount is not null return amount else return 0.
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