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Best practices for in-app database migration for Sqlite
I am using sqlite for my iphone and I anticipate the database schema might change over time. What are the gotchas, naming conventions and things to watch out for to do a successful migration each time?
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Push to GitHub without a password using ssh-key
I generated an SSH key pair without a password and added the public key to GitHub.
6 Answers
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Replace values in list using Python [duplicate]
...ns ± 13.6 ns per loop (mean ± std. dev. of 7 runs, 1000000 loops each)
And Python 2.7.6 timings:
In [1]: %%timeit
...: items = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
...: for index, item in enumerate(items):
...: if not (item % 2):
...: items[index] = None
...:
1000000 l...
Get output parameter value in ADO.NET
...ially you just need to create a SqlParameter, set the Direction to Output, and add it to the SqlCommand's Parameters collection. Then execute the stored procedure and get the value of the parameter.
Using your code sample:
// SqlConnection and SqlCommand are IDisposable, so stack a couple using()...
ASP.NET MVC ActionLink and post method
Can anyone tell me how can I submit values to Controller using ActionLink and POST method?
I don't want to use buttons.
I guess it has something with jquery.
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Add Foreign Key to existing table
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Reasons help me understand and remember. This is because you can't add a foreign key to an non-unsigned field, correct?
– PixMach
Sep 28 '15 at 21:25
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How to get Enum Value from index in Java?
...er loop of performance sensitive code you might want to make a static copy and use that.
– Christopher Barber
Oct 4 '13 at 0:11
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how to break the _.each function in underscore.js
...k from the each method—it emulates the native forEach method's behavior, and the native forEach doesn't provide to escape the loop (other than throwing an exception).
However, all hope is not lost! You can use the Array.every method. :)
From that link:
every executes the provided callback fu...
Big O, how do you calculate/approximate it?
...n't a moron, its average case complexity is O(n log n) and it uses a pivot selection strategy that reduces the odds of hitting the O(n²) case). And both bsearch and qsort can be worse if the comparator function is pathological.
– ShadowRanger
Mar 21 '19 at 14:...
How to display gpg key details without importing it?
I have a copy of the postgresql apt repository gpg key and would like to view the details of the gpg key as it comes in the file. Is this possible without importing it into a key ring?
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