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reference assignment is atomic so why is Interlocked.Exchange(ref Object, Object) needed?

In my multithreaded asmx web service I had a class field _allData of my own type SystemData which consists of few List<T> and Dictionary<T> marked as volatile . The system data ( _allData ) is refreshed once in a while and I do it by creating another object called newData and fill...
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SAML vs federated login with OAuth

...tion. OAuth is more about delegating access to something. You are basically allowing someone to "act" as you. Its most commonly used to grant access api's that can do something on your behalf. They are two completely different things. Some examples that might help out. OAuth think of an tw...
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Accessing console and devtools of extension's background.js

...updated the picture. The triangle has been removed, that step now automatically happens when Developer mode is activated. – Rob W Oct 23 '14 at 9:28 ...
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How to select the nth row in a SQL database table?

... this feature built-in. Use the ROW_NUMBER() function. It is excellent for web-pages with a << Prev and Next >> style browsing: Syntax: SELECT * FROM ( SELECT ROW_NUMBER () OVER (ORDER BY MyColumnToOrderBy) AS RowNum, * FROM T...
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How to find a Java Memory Leak

... supposed to be able to find the root reference ( ref ) or whatever it is called. Basically, I can tell that there are several hundred megabytes of hash table entries ([java.util.HashMap$Entry or something like that), but maps are used all over the place... Is there some way to search for large maps...
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Solving a “communications link failure” with JDBC and MySQL [duplicate]

...hat have been mentioned in different web sites, but non of them worked. Finally I changed my code and found out what was the problem. I'll try to tell you about different approaches and sum them up here. While I was seeking the internet to find the solution for this error, I figured out that there ...
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When would you use a WeakHashMap or a WeakReference?

...th user-supplied images, like the web site design tool I work on. Naturally you want to cache these images, because loading them from disk is very expensive and you want to avoid the possibility of having two copies of the (potentially gigantic) image in memory at once. Because an...
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How to Store Historical Data

...current, active record. So, let's say I have table FOO. Under my system, all active records will go in FOO, and all historical records will go in FOO_Hist. Many different fields in FOO can be updated by the user, so I want to keep an accurate account of everything updated. FOO_Hist holds the exa...
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Anti forgery token is meant for user “” but the current user is “username”

...user as part of the encrypted token for better validation. When you first call the @Html.AntiForgeryToken() the user is not logged in so the token will have an empty string for the username, after the user logs in, if you do not replace the anti-forgery token it will not pass validation because the ...
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Spring 3 RequestMapping: Get path value

...ameter methodParameter, ModelAndViewContainer modelAndViewContainer, NativeWebRequest nativeWebRequest, WebDataBinderFactory webDataBinderFactory) throws Exception { HttpServletRequest request = nativeWebRequest.getNativeRequest(HttpServletRequest.class); return request == nu...