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How to find and return a duplicate value in array

...cate, and doesn't give you all the dups. – Jaime Bellmyer Jan 26 '14 at 22:57  |  show 11 more comments ...
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Why is there a difference in checking null against a value in VB.NET and C#?

...assumptions about usage; in this case the semantics of a NULL comparison. My personal preference is for the VB.NET semantics, which in essence gives NULL the semantics "I don't know yet". Then the comparison of 5 to "I don't know yet". is naturally "I don't know yet"; ie NULL. This has the addition...
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B-Tree vs Hash Table

In MySQL, an index type is a b-tree, and access an element in a b-tree is in logarithmic amortized time O(log(n)) . 5 Answ...
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techniques for obscuring sensitive strings in C++

...ve information (a symmetric encryption key that I want to keep private) in my C++ application. The simple approach is to do this: ...
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Show an image preview before upload

In my HTML form I have input filed with type file for example : 5 Answers 5 ...
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Is there any way in C# to override a class method with an extension method?

...one can let me know what it is actually called. You might have guessed by my "pass-through" method names that I also toyed with the idea of passing delegates to them in the hopes that a single method or two could act as a pass-through for multiple methods with the same signature. Unfortunately it w...
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What is an MvcHtmlString and when should I use it?

...le, I hate trying to remember the <link> tag syntax, so I've created my own extension method to make a <link> tag: <Extension()> _ Public Function CssBlock(ByVal html As HtmlHelper, ByVal src As String, ByVal Optional ByVal htmlAttributes As Object = Nothing) As MvcHtmlString ...
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How to list branches that contain a given commit?

... HEAD problem... then you have a hard question of a preferred branch... In my previous example you could easily say that master is always preferred if it's in this list. From there it's less clear. You could try and read git branch from .gitmodules file: git config -f .gitmodules submodule.src/foo/s...
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In what situations would AJAX long/short polling be preferred over HTML5 WebSockets?

...s I use signalr (one of the best implementations of websocket ever made in my opinion - it runs on the client and server and allows the client to call methods on the server and the server on the client as if there is no difference) on every website I make - dynamic content loading, bottomless pages,...
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Is 'float a = 3.0;' a correct statement?

...er than division by 10f, and more precise than multiplication by 0.1f. My original point was to demonstrate a false example given in another question but this finely demonstrates subtle issues can exist in toy examples. ...