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What is the use of making constructor private in a class?

...ared public, others private. For reducing code size, public constructors 'call' private constructors which in turn do all the work. Your public constructors are thus called delegating constructors: class MyClass { public: MyClass() : MyClass(2010, 1, 1) { } private: MyClass(int theYear, int th...
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How to send email via Django?

...self an email! The above article mentioned by miku was perfect. Note the small typo correction in the comments of the article. (And I just used my regular computer/localhost. I had not set anything else up before hand.) – user984003 Oct 24 '12 at 16:11 ...
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Setting environment variables on OS X

... extensive research and if you want to set variables that are available in all GUI applications, your only option is /etc/launchd.conf. Please note that environment.plist does not work for applications launched via Spotlight. This is documented by Steve Sexton here. Open a terminal prompt Type su...
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@UniqueConstraint and @Column(unique = true) in hibernate annotation

... The same aplies for group. On the other hand, @Table( name = "product_serial_group_mask", uniqueConstraints = {@UniqueConstraint(columnNames = {"mask", "group"})} ) Implies that the values of mask + group combined should be unique. That means you can have, for example, a record with mask...
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How to use OpenFileDialog to select a folder?

... Basically you need the FolderBrowserDialog class: Prompts the user to select a folder. This class cannot be inherited. Example: using(var fbd = new FolderBrowserDialog()) { DialogResult result = fbd.ShowDialog(); i...
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“find: paths must precede expression:” How do I specify a recursive search that also finds files in

...me reason single quotes didn't work for me. I had to use double quotes. ¯\_(ツ)_/¯ – Planky Mar 24 '17 at 21:41 ...
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A html space is showing as %2520 instead of %20

...e using) double encoding characters? Edit: Expanding a bit on this, especially for LOCAL links. Assuming you want to link to the resource C:\my path\my file.html: if you provide a local file path only, the browser is expected to encode and protect all characters given (in the above, you should gi...
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Why would iterating over a List be faster than indexing through it?

...nt head -> item1 -> print item1 -> item2 -> print item2 etc. all in a single traversal, which is O(N). Now, going to the other implementation of List which is ArrayList, that one is backed by a simple array. In that case both of the above traversals are equivalent, since an array is c...
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how to convert from int to char*?

... The first part doesn't actually answer the question (although it is good helpful information as I wasn't aware of that function) – jcoder Jun 1 '12 at 9:31 ...
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Authorize Attribute with Multiple Roles

...ttpContext.Current.User.Identity as ClaimsIdentity; string _role = claimsIdentity.FindFirst(ClaimTypes.Role).Value; bool isAuthorize = Roles.Any(role => role == _role); if(!isAuthorize) HandleUnauthorizedRequest(actionContext); ...