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What exactly is an “open generic type” in .NET? [duplicate]

... be a type that's either a type argument or a generic type defined with unknown type arguments: All types can be classified as either open types or closed types. An open type is a type that involves type parameters. More specifically: A type parameter defines an open type. An array type is an open...
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Cannot download Docker images behind a proxy

...tory for the Docker service: mkdir /etc/systemd/system/docker.service.d Now create a file called /etc/systemd/system/docker.service.d/http-proxy.conf that adds the HTTP_PROXY environment variable: [Service] Environment="HTTP_PROXY=http://proxy.example.com:80/" If you have internal Docker regis...
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Using querySelectorAll to retrieve direct children

...do "combinator rooted queries" (as John Resig called them) did not exist. Now the :scope pseudo-class has been introduced. It is not supported on [pre-Chrominum] versions of Edge or IE, but has been supported by Safari for a few years already. Using that, your code could become: let myDiv = getEle...
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Direct casting vs 'as' operator?

...n explicitly defined, e.g.: int? i; string s = "5"; i = s as int; // i is now 5 s = null; i = s as int; // i is now null – Anheledir Sep 25 '08 at 10:41 3 ...
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How to trigger a build only if changes happen on particular set of files

...s://github.com/jenkinsci/git-plugin/pull/49 Update: The Git plugin (1.16) now has the 'included' region feature. share | improve this answer | follow | ...
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How do I implement a callback in PHP?

... With PHP 5.3, you can now do this: function doIt($callback) { $callback(); } doIt(function() { // this will be done }); Finally a nice way to do it. A great addition to PHP, because callbacks are awesome. ...
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How to make an anchor tag refer to nothing?

... @eugene this question is 3 years old now, but IE used to make images disappear when surrounded by a link to a void function. Not sure when it was fixed, but it works in IE10, which is all I have installed. I personally now use <a href="javascript:;"> ...
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What to do with commit made in a detached head

... I know this is years later, but thanks for this answer. I didn't consider myself done searching with the accepted answer here because I didn't want to leave around a temporary branch and this answer has the command to delete it....
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Alternative to iFrames with HTML5

I would like to know if there is an alternative to iFrames with HTML5. I mean by that, be able to inject cross-domains HTML inside of a webpage without using an iFrame. ...
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Metadata file … could not be found error when building projects

... explorer window but I removed and readded it anyway. It builds just fine now! share | improve this answer | follow | ...