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How to generate a random alpha-numeric string?

I've been looking for a simple Java algorithm to generate a pseudo-random alpha-numeric string. In my situation it would be used as a unique session/key identifier that would "likely" be unique over 500K+ generation (my needs don't really require anything much more sophisticated). ...
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How to avoid the “Circular view path” exception with Spring MVC test

I have the following code in one of my controllers: 20 Answers 20 ...
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href=“tel:” and mobile numbers

If I use tel: I should write the international phone code, like that. 5 Answers 5 ...
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Is JavaScript's “new” keyword considered harmful?

In another question , a user pointed out that the new keyword was dangerous to use and proposed a solution to object creation that did not use new . I didn't believe that was true, mostly because I've used Prototype, Scriptaculous and other excellent JavaScript libraries, and everyone of them us...
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Python int to binary string?

Are there any canned Python methods to convert an Integer (or Long) into a binary string in Python? 35 Answers ...
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What does Python's eval() do?

In the book that I am reading on Python, it keeps using the code eval(input('blah')) 10 Answers ...
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What's a reliable way to make an iOS app crash?

I want to test my app's crash reporting out in the field by deliberately having it crash when the user performs a particular action that a real user is unlikely to do accidentally. ...
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Ukkonen's suffix tree algorithm in plain English

I feel a bit thick at this point. I've spent days trying to fully wrap my head around suffix tree construction, but because I don't have a mathematical background, many of the explanations elude me as they start to make excessive use of mathematical symbology. The closest to a good explanation that ...
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Looking for a 'cmake clean' command to clear up CMake output

Just as make clean deletes all the files that a makefile has produced, I would like to do the same with CMake. All too often I find myself manually going through directories removing files like cmake_install.cmake and CMakeCache.txt , and the CMakeFiles folders. ...
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ALTER TABLE to add a composite primary key

I have a table called provider . I have three columns called person , place , thing . There can be duplicate persons, duplicate places, and duplicate things, but there can never be a dupicate person-place-thing combination. ...