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How do you create nested dict in Python?
...t;> d
{'dict1': {'innerkey': 'value'}}
You can also use a defaultdict from the collections package to facilitate creating nested dictionaries.
>>> import collections
>>> d = collections.defaultdict(dict)
>>> d['dict1']['innerkey'] = 'value'
>>> d # currentl...
How do I remove duplicates from a C# array?
I have been working with a string[] array in C# that gets returned from a function call. I could possibly cast to a Generic collection, but I was wondering if there was a better way to do it, possibly by using a temp array.
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Is there a good reason I see VARCHAR(255) used so often (as opposed to another length)?
... chosen so often, other than being a nice round number ? Is it a holdout from some time in the past when there was a good reason (whether or not it applies today)?
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How to Set Opacity (Alpha) for View in Android
....getBackground().setAlpha(128); // 50% transparent
Where the INT ranges from 0 (fully transparent) to 255 (fully opaque).
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Fastest way to find second (third…) highest/lowest value in vector or column
...t I do not see a really fast way to find another value in the order, apart from sorting the whole vector and then picking a value x from this vector.
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SQLite with encryption/password protection
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Get the docs from here system.data.sqlite.org/index.html/doc/trunk/www/index.wiki
– Mangesh
Apr 26 '16 at 15:51
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Commit history on remote repository
...emote branch in that repository, but only the logs that you have "fetched" from their repository to your personal "copy" of the remote repository.
Remember that your clone of the repository will update its state of any remote branches only by doing git fetch. You can't connect directly to the serve...
Git in Powershell saying 'Could not find ssh-agent'
...for a detailed explanation have a read of this blog post. Below is a quote from the blog post. Ultimately the ssh-agent.exe needs to be in the path, or resolved some other way.
EDIT:
It appears most of the people don't bother reading the linked blog and the original extract did not quote the full so...
How do you rotate a two dimensional array?
...e isolate a single layer so we can rotate it? Firstly, we inspect a matrix from the outermost layer, inwards, to the innermost layer. A 5×5 matrix has three layers in total and two layers that need rotating:
. . . . .
. x x x .
. x O x .
. x x x .
. . . . .
Let’s look at columns first. The pos...
Cache Invalidation — Is there a General Solution?
...n be modified outside of it's control.
If you have an idempotent function from a, b to c where, if a and b are the same then c is the same but the cost of checking b is high then you either:
accept that you sometime operate with out of date information and do not always check b
do your level best...