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How to check if an email address exists without sending an email?
... can connect to the server, and issue a VRFY command. Very few servers support this command, but it is intended for exactly this. If the server responds with a 2.0.0 DSN, the user exists.
VRFY user
You can issue a RCPT, and see if the mail is rejected.
MAIL FROM:<>
RCPT TO:<user@domain&...
WPF Databinding: How do I access the “parent” data context?
... like this:
...Binding="{Binding RelativeSource={RelativeSource FindAncestor,
AncestorType={x:Type Window}}, Path=DataContext.AllowItemCommand}" ...
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Mongoose and multiple database in single node.js project
.... One sub project will have one Mongodb database and Mongoose will be use for wrapping and querying db. But the problem is
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Why aren't Java Collections remove methods generic?
...e get method
of Map, remove method and some other, but "it simply didn't work".
There are too many reasonable programs that could not be generified if
you only allow the generic type of the collection as parameter type.
The example given by him is an intersection of a List of Numbers and a
List...
appending array to FormData and send via AJAX
I'm using ajax to submit a multipart form with array, text fields and files.
9 Answers
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What is the yield keyword used for in C#?
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The yield keyword actually does quite a lot here.
The function returns an object that implements the IEnumerable<object> interface. If a calling function starts foreaching over this object, the function is called again until it "yie...
How to keep up with the latest versions of Node.js in Ubuntu? PPA? Compiling?
Where can (can I ?) find .deb packages for the latest versions of Node.js ?
6 Answers
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Deprecation warning when using has_many :through :uniq in Rails 4
...ed a deprecation warning when using :uniq => true with has_many :through. For example:
2 Answers
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Non-Singleton Services in AngularJS
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I don't think we should ever have a factory return a newable function as this begins to break down dependency injection and the library will behave awkwardly, especially for third parties. In short, I am not sure there are any legitimate use cases for non-singleton...
How to change the playing speed of videos in HTML5?
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According to this site, this is supported in the playbackRate and defaultPlaybackRate attributes, accessible via the DOM. Example:
/* play video twice as fast */
document.querySelector('video').defaultPlaybackRate = 2.0;
docume...