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Most efficient way to store thousand telephone numbers
...ounts and each count is at most 1000. If we omit the last one (because we know it is 1000 anyway), we can store all of these numbers in a contiguous block of (2^m - 1) * 10 bits. (10 bits is enough for storing a number less than 1024.)
The last k bits of all (reduced) phone numbers are stored conti...
How can I save an image to the camera roll?
...r your patience qegal. I haven't had a chance to revisit this issue until now. Your EDIT us super helpful. The image is in the app's bundle. There are several images in the app and they can be viewed as small thumbnails. When a small thumbnail is selected it goes to a new view and a fullscreen v...
Meaning of Git checkout double dashes
...tory, and I want to revert changes on it.
git checkout path/to/file.txt
Now suppose that the file is named master...
git checkout master
Whoops! That changed branches instead. The -- separates the tree you want to check out from the files you want to check out.
git checkout -- master
It a...
CSS does the width include the padding?
...remember (or find) the names of the different options for a couple of days now... +1 =)
– David says reinstate Monica
Jan 15 '11 at 15:04
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Is there a good reason I see VARCHAR(255) used so often (as opposed to another length)?
...ve to use its "utf8mb4" encoding. But people are much more likely to not know that and go with "utf8", and much more likely to want UTF-8 than any other encoding, so, presto, they wind up with a maximum indexable length of 255 characters in a VARCHAR. Your astoundment notwithstanding.
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How to import classes defined in __init__.py
...d something like this to lib/__init__.py
from .helperclass import Helper
now you can import it directly:
from lib import Helper
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Why can I access private variables in the copy constructor?
...references back to parent/coordination/management objects that might be unknown or write-only for the client code
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The builds tools for v120 (Platform Toolset = 'v120') cannot be found
... this error, you may be invoking the wrong MSBuild. With VS2013, Microsoft now includes MSBuild as part of Visual Studio. See this Visual Studio blog posting for details.
In particular, note the new location of the binaries:
On 32-bit machines they can be found in: C:\Program
Files\MSBuild\12...
Maintain model of scope when changing between views in AngularJS
...oreunload and $rootScope.$broadcast('saveState'); to let all the services know that they should save their state, and $rootScope.$broadcast('restoreState') to let them know to restore their state ( used for when the user leaves the page and presses the back button to return to the page respectively)...
What exactly is nullptr?
We now have C++11 with many new features. An interesting and confusing one (at least for me) is the new nullptr .
14 Answe...