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How should I have explained the difference between an Interface and an Abstract class?
...Implement the same default behavior here
// that is shared by all subclasses.
}
// Each subclass needs to provide their own implementation of this only:
public abstract void checkDBforUser();
}
Now in each child class, we only need to implement one method - the method that i...
SQL query to select dates between two dates
...should put those two dates between single quotes like..
select Date, TotalAllowance from Calculation where EmployeeId = 1
and Date between '2011/02/25' and '2011/02/27'
or can use
select Date, TotalAllowance from Calculation where EmployeeId = 1
and Date >= '2011/02/...
How can I dynamically set the position of view in Android?
... position of this view relative to its parent. This method is meant to be called by the layout system and should not generally be called otherwise, because the property may be changed at any time by the layout. - so maybe thats not that good an idea ;)
– katzenhut
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Create a date from day month and year with T-SQL
...
Assuming y, m, d are all int, how about:
CAST(CAST(y AS varchar) + '-' + CAST(m AS varchar) + '-' + CAST(d AS varchar) AS DATETIME)
Please see my other answer for SQL Server 2012 and above
...
How do 20 questions AI algorithms work?
...o get an answer after log2(N) questions.
With 20 question, we should optimally be able to find a word among 2^20 = 1 million words.
One easy way to eliminate outliers (wrong answers) would be to probably use something like RANSAC. This would mean, instead of taking into account all questions whic...
How to loop through a directory recursively to delete files with certain extensions
I need to loop through a directory recursively and remove all files with extension .pdf and .doc . I'm managing to loop through a directory recursively but not managing to filter the files with the above mentioned file extensions.
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Converting a generic list to a CSV string
...st) and would like to generate a string of comma delimited values. That is all items in the list output to a single comma delimted list.
...
Positions fixed doesn't work when using -webkit-transform
...
Actually I found another way to fix this "bug":
I have container element which hold page with css3 animations. When the page completed the animation, the css3 property has value: transform: translate(0,0);. So, I just removed th...
Scheduling R Script
...
Actually under Windows you do not even have to create a batch file first to use the Scheduler.
Open the scheduler: START -> All Programs -> Accesories -> System Tools -> Scheduler
Create a new Task
under tab Actio...
When does invoking a member function on a null instance result in undefined behavior?
...) and (b) result in undefined behavior. It's always undefined behavior to call a member function through a null pointer. If the function is static, it's technically undefined as well, but there's some dispute.
The first thing to understand is why it's undefined behavior to dereference a null poin...