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Best way to convert an ArrayList to a string

...that having any sort of output (be it to disk or to the screen) will be at least an order of a magnitude slower than having to worry about the performance of string concatenations. Edit: As pointed out in the comments, the above compiler optimization is indeed creating a new instance of StringBuild...
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When to use Amazon Cloudfront or S3

...end user and is used to make the information available on Amazon S3 in the least possible time. A sample use case is Video on Demand. You stores your videos at one place. S3 stores all the pre-recorded videos in different formats. You have global user case CloudFront is used to cache the video to...
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CSS background image to fit width, height should auto-scale in proportion

...ly what I want, thanks. It doesn't seem to work in Chrome (or Chromium, at least) -- got any bright ideas? – spraff Feb 14 '12 at 12:40 ...
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Security of REST authentication schemes

...that would generate the same hash. Easy to do with MD5 hash values now at least and when SHA-1 is broken, well, you get the picture. To secure the body from tampering, you would need to require a signature of the body, which a man-in-the-middle attack would be less likely to be able to break since...
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How to rethrow InnerException without losing stack trace in C#?

...lways throws an exception. throw; will never be called as a result, but at least the compiler won't complain if your method requires a return object or is an async function. – Todd Jul 9 '14 at 23:19 ...
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IIS 500.19 with 0x80070005 The requested page cannot be accessed because the related configuration d

...permissions. The access rights should be fairly straightforward, i.e. at least Read, and, depending on your app, maybe Write. Above, you mention IUSR etc. not being in the properties for web.config. If by that you mean that IUSR is not listed in the security tab of the file then it's a good thing...
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Visual Studio Solutions Folder as real Folders

...s not really explain how. I guess what I'm describing here is possibly the least awkward way of achieving that... :-P The problem with regular project files is that they eventually will be compiled by MSBUILD. And if you want have a project which only contains non-compilable files, that will be an ...
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Does Java have a HashMap with reverse lookup?

... really guaranteed by taking care of it when changing a value by a put (at least I hope to guarantee it hereby) Usage is just like a normal map, to get a reverse view on the mapping call getReverseView(). The content is not copied, only a view is returned. I'm not sure this is totally fool-proof ...
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Checking if a list is empty with LINQ

... IEnumerable.GetEnumerator method, create an instance and call MoveNext at least once. /EDIT @Matt: I can only assume that the Count() extension method for IEnumerable is doing something like this: Yes, of course it does. This is what I meant. Actually, it uses ICollection instead of IList bu...
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When would you use the different git merge strategies?

...g the conflict. Or, if these are slight changes that do cause conflict, at least the conflict should be easy for the developer to handle.. I have successfully merged trees using "resolve" that failed with the default recursive strategy. I was getting fatal: git write-tree failed to write a tree err...