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What algorithms compute directions from point A to point B on a map?
...stead of doing Dijkstra's once from source to dest, you start at each end, and expand both sides until they meet in the middle. This eliminates roughly half the work (2*pi*(r/2)^2 vs pi*r^2).
To avoid exploring the back-alleys of every city between your source and destination, you can have several l...
What makes a keychain item unique (in iOS)?
...ws (derived from open source files from Apple, see Schema.m4, KeySchema.m4 and SecItem.cpp):
For a keychain item of class kSecClassGenericPassword, the primary key is the combination of
kSecAttrAccount and kSecAttrService.
For a keychain item of class kSecClassInternetPassword, the primary key is...
How to find where a method is defined at runtime?
...d occurred, a backend process failed to run. Now, we were good little boys and girls and ran rake test after every check-in but, due to some oddities in Rails' library loading, it only occurred when we ran it directly from Mongrel in production mode.
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Querying DynamoDB by date
I'm coming from a relational database background and trying to work with amazon's DynamoDB
7 Answers
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Visual Studio refuses to forget breakpoints?
... window, you can view all breakpoints in the application. Here, you select and clear the breakpoint by clicking the Delete button from the toolbar on the Breakpoints pane.
– jams
May 12 '11 at 20:50
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Is there a max array length limit in C++?
... the restrictions of the size type used to describe an index in the array (and the size thereof). It is given by the maximum value the system's std::size_t can take. This data type is large enough to contain the size in bytes of any object
The other limit is a physical memory limit. The larger your...
Highlight a word with jQuery
...ipt-text-higlighting-jquery-plugin.html
*
* Code a little bit refactored and cleaned (in my humble opinion).
* Most important changes:
* - has an option to highlight only entire words (wordsOnly - false by default),
* - has an option to be case sensitive (caseSensitive - false by default)
* ...
Pandas timeseries plot setting x-axis major and minor ticks and labels
I want to be able to set the major and minor xticks and their labels for a time series graph plotted from a Pandas time series object.
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Why is pow(a, d, n) so much faster than a**d % n?
I was trying to implement a Miller-Rabin primality test , and was puzzled why it was taking so long (> 20 seconds) for midsize numbers (~7 digits). I eventually found the following line of code to be the source of the problem:
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Git stash pop- needs merge, unable to refresh index
...y stash because I merged a branch which apparently conflicts with my stash and now my stash is seemingly unable to be popped.
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