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What is the behavior difference between return-path, reply-to and from?

... Now, let's describe the different "FROM"s. The return path (sometimes called the reverse path, envelope sender, or envelope from — all of these terms can be used interchangeably) is the value used in the SMTP session in the MAIL FROM command. As you can see, this does not need to be the same v...
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How to convert java.util.Date to java.sql.Date?

...tually not available in the JDBC/Java7 paradigm. – sf_jeff Aug 17 at 1:28 @sf_jeff Java 7 support is covered in the bu...
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Laravel Eloquent Sum of relation's column

...The documentation is a little light for some of the Collection methods but all the query builder aggregates are seemingly available besides avg() that can be found at http://laravel.com/docs/queries#aggregates. share ...
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Xcode can only refactor C and Objective-C code. How to rename swift class name in Xcode 6?

... Identify and type section rename existing class in "name" field. That's all! Previously I manually rename the class name in the class file. share | improve this answer | f...
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Why do we need fibers

...Ruby class in Ruby 1.9. These are incredibly useful. In Ruby 1.9, if you call almost any iterator method on the core classes, without passing a block, it will return an Enumerator. irb(main):001:0> [1,2,3].reverse_each => #<Enumerator: [1, 2, 3]:reverse_each> irb(main):002:0> "abc"....
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Simple proof that GUID is not unique [closed]

...(OutOfMemoryException) { // Release the ram we allocated up front. // Actually, these are pointless too. //GC.KeepAlive(reserveSomeRam); //GC.Collect(); } Console.WriteLine("{0:u} - Built bigHeapOGuid...
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ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)

...ms instead of programming. Recently, I have been following a manual to install a software suite on Ubuntu. I have no knowledge of mySQL at all, actually. I have done the following installations on my Ubuntu. ...
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assign multiple variables to the same value in Javascript

... Yeah, if doing this with an object, all the variables will be aliases of the object. I.E function MyObj(){this.x=1} var a,b; a = b = new MyObj(); ++a.x will also increment the b.x property. – AlexMorley-Finch Mar 10 '14 at...
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How do you work with an array of jQuery Deferreds?

...data be loaded in a certain order: the root URL, then the schemas, then finally initialize the application with the schemas and urls for the various data objects. As the user navigates the application, data objects are loaded, validated against the schema, and displayed. As the user CRUDs the data...
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Using -performSelector: vs. just calling the method

... Basically performSelector allows you to dynamically determine which selector to call a selector on the given object. In other words the selector need not be determined before runtime. Thus even though these are equivalent: [a...