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How to replace a hash key with another key

...n't like "smart" ruby code because it takes some time to tell what it is really doing. Your solution is in other hand simple and descriptive. – Lucas Nov 13 '14 at 18:55 3 ...
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Time complexity of Sieve of Eratosthenes algorithm

...oose upper-bound is n(1+1/2+1/3+1/4+1/5+1/6+…1/n) (sum of reciprocals of all numbers up to n), which is O(n log n): see Harmonic number. A more proper upper-bound is n(1/2 + 1/3 + 1/5 + 1/7 + …), that is sum of reciprocals of primes up to n, which is O(n log log n). (See here or here.) The "find...
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Why is Python 3.x's super() magic?

In Python 3.x, super() can be called without arguments: 1 Answer 1 ...
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Creating C macro with ## and __LINE__ (token concatenation with positioning macro)

...lizing) unless the result needs to be "stringified". Gcc has features but ALL can be done with plain C version 1 (and some argue Berkeley 4.3 C is so much faster it's worth learning how to use). **Clang (llvm) DOES NOT DO WHITE SPACE CORRECTLY for macro expansion - it adds whitespace (which certai...
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Jackson enum Serializing and DeSerializer

... I really dislike this solution for the simple fact that you introduce two sources of truth. The developer will always have to remember to add the name in two places. I much prefer a solution that just does the right thing without...
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How to call base.base.method()?

...Derived { public override void Say() { Console.WriteLine("Called from Special Derived."); var ptr = typeof(Base).GetMethod("Say").MethodHandle.GetFunctionPointer(); var baseSay = (Action)Activator.CreateInstance(typeof(Action), this, ptr); baseSay(...
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How to color System.out.println output? [duplicate]

...minals simply won't support some (if any) ANSI escape sequences and, especially, 24-bit colors. Usage Please refer to the section Curses at the bottom for the best solution. For a personal or easy solution (although not as cross-platform solution), refer to the ANSI Escape Sequences section. TL...
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How to find the duration of difference between two dates in java?

... Hi first of all thank you so much for your short and nice answer, I am facing one problem on your solution like I have two date 06_12_2017_07_18_02_PM and another one is 06_12_2017_07_13_16_PM, I am getting 286 seconds instead I should g...
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Is it possible to preview stash contents in git?

...shows the last tone, 1 the second last one.. etc. git stash list will show all the available. – brita_ Jul 18 '14 at 21:13 7 ...
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How to prevent caching of my Javascript file? [duplicate]

... Add a random query string to the src You could either do this manually by incrementing the querystring each time you make a change: <script src="test.js?version=1"></script> Or if you are using a server side language, you could automatically generate this: ASP.NET: <scri...