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Cannot drop database because it is currently in use
...io: Right click database: Properties -> Options -> Restrict Access : Set to "Single User" and perform the drop afterwards.
– AceAlfred
Sep 27 '13 at 11:02
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What is the difference between varchar and nvarchar?
...equired than they should be about internationalisation and other character set issues'.
– Cowan
Oct 15 '10 at 21:38
1
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Conversion from Long to Double in Java
...could simply do :
double d = (double)15552451L;
Or you could get double from Long object as :
Long l = new Long(15552451L);
double d = l.doubleValue();
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Swipe to Delete and the “More” button (like in Mail app on iOS 7)
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How to Implement
It looks like iOS 8 opens up this API. Hints of such functionality are present in Beta 2.
To get something working, implement the following two methods on your UITableView's delegate to get the desired effect (see gist for an example).
- tableView:editActionsForRowAtI...
Checking for empty arrays: count vs empty
...ning for count though :
count() may return 0 for a variable that isn't set, but it may also return 0 for a variable that has been initialized with an empty array. Use isset() to test if a variable is set.
In other words, if the variable is not set, you will get a notice from PHP saying it's un...
EOFError: end of file reached issue with Net::HTTP
...e.
url = URI.parse(domain)
req = Net::HTTP::Post.new(url.request_uri)
req.set_form_data({'name'=>'Sur Max', 'email'=>'some@email.com'})
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = (url.scheme == "https")
response = http.request(req)
See more in my blog: EOFError: end of file rea...
How to check task status in Celery?
...ng" state.
In order for Celery to record that a task is running, you must set task_track_started to True. Here is a simple task that tests this:
@app.task(bind=True)
def test(self):
print self.AsyncResult(self.request.id).state
When task_track_started is False, which is the default, the stat...
Why are arrays covariant but generics are invariant?
... did not include generics (a.k.a. parametric polymorphism).
In such a setting, making arrays invariant rules out useful polymorphic programs.
For example, consider writing a function to shuffle an array, or a function that tests two arrays for equality using the Object.equals method on the el...
Why is the minimalist, example Haskell quicksort not a “true” quicksort?
Haskell's website introduces a very attractive 5-line quicksort function , as seen below.
11 Answers
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Creating dataframe from a dictionary where entries have different lengths
...B vs A, which is quite impressive especially when working with a huge data set (mainly with a big number of columns/features).
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