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C++ unordered_map using a custom class type as the key

... things: A hash function; this must be a class that overrides operator() and calculates the hash value given an object of the key-type. One particularly straight-forward way of doing this is to specialize the std::hash template for your key-type. A comparison function for equality; this is require...
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Why not use exceptions as regular flow of control?

To avoid all standard-answers I could have Googled on, I will provide an example you all can attack at will. 24 Answers ...
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Difference between JVM and HotSpot?

What exactly is HotSpot and how does it relate to JVM and OpenJDK? Is it a library? What exactly does it do? 6 Answers ...
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WARN Could not determine content-length of response body. Set content-length of the response or set

I just upgraded to rails 3.2.2, and now on rails s, page load, I get all these errors in the log: 3 Answers ...
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Is there any pythonic way to combine two dicts (adding values for keys that appear in both)?

...ith them you'd normally do with that type, such as iterate over their keys and values. share | improve this answer | follow | ...
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Passing arrays as url parameter

...am%5B1%5D=4&aParam%5Ba%5D=b&aParam%5Bc%5D=d" http_build_query() handles all the necessary escaping for you (%5B => [ and %5D => ]), so this string is equal to aParam[0]=1&aParam[1]=4&aParam[a]=b&aParam[c]=d. ...
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xkcd style graphs in MATLAB

...Rody Oldenhuis' solution). The second way is to create a non-jittery plot, and use imtransform to apply a random distortion to the image. This has the advantage that you can use it with any plot, but you will end up with an image, not an editable plot. I'll show #2 first, and my attempt at #1 below...
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Remove sensitive files and their commits from Git history

...ect on GitHub but it contains certain files with sensitive data (usernames and passwords, like /config/deploy.rb for capistrano). ...
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Is there a JSON equivalent of XQuery/XPath?

When searching for items in complex JSON arrays and hashes, like: 15 Answers 15 ...
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Difference between HashMap, LinkedHashMap and TreeMap

What is the difference between HashMap , LinkedHashMap and TreeMap in Java? I don't see any difference in the output as all the three has keySet and values . What are Hashtable s? ...