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Getting “CHECKOUT can only be performed on a version resource” when trying to commit using Eclipse s

...om my project (by right clicking on the project from the package explorer, selecting "Team" -> "Commit"), I get the error: ...
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How can I return an empty IEnumerable?

...rExists) yield break; foreach(var descendant in doc.Descendants("user").Select(user => new Friend { ID = user.Element("id").Value, Name = user.Element("name").Value, URL = user.Element("url").Value, Photo = user.Element("photo").Value })) { yield r...
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LINQ .Any VS .Exists - What's the difference?

... Enumerable.Repeat("ABCDEFGHIJKLMNOPQRSTUVWXYZ", 13) .Select(s => { var cryptoResult = new byte[4]; new RNGCryptoServiceProvider().GetBytes(cryptoResult); return s[new Random(BitConverter.ToInt32(cryp...
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400 BAD request HTTP error code meaning?

... Selecting a HTTP response code is quite an easy task and can be described by simple rules. The only tricky part which is often forgotten is paragraph 6.5 from RFC 7231: Except when responding to a HEAD request, the server...
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Look up all descendants of a class in Ruby

...e: class Parent def self.descendants ObjectSpace.each_object(Class).select { |klass| klass < self } end end class Child < Parent end class GrandChild < Child end puts Parent.descendants puts Child.descendants puts Parent.descendants gives you: GrandChild Child puts Child.de...
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How is the default submit button on an HTML form determined?

...cus for any visual element yet will still cause the invisible button to be selected. To avoid this issue, simply set tabindex attributes accordingly and omit a tabindex attribute on the invisible submit button. While it may seem out of place to promote these styles to !important, they should preven...
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An App ID with Identifier '' is not available. Please enter a different string

...s trying to create appeared in appstoreconnect when creating a new app and selecting the bundle ID. It was named "XC com domain appname - com.domain.appname"; * I couldn't see the ID in developer.apple.com because the scroll bar is hidden by default in Safari. Didn't see that there are more entries....
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What is an IndexOutOfRangeException / ArgumentOutOfRangeException and how do I fix it?

...var command = connection.CreateCommand()) { command.CommandText = "SELECT MyColumn1, MyColumn2 FROM MyTable"; using (var reader = command.ExecuteReader()) { while (reader.Read()) { ProcessData(reader.GetString(2)); // Throws! } } }...
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IIS_IUSRS and IUSR permissions in IIS8

...the underline): Press OK to add the user With the new user (your domain) selected, now you can safely provide any Modify or Write permissions share | improve this answer | ...
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Really Cheap Command-Line Option Parsing in Ruby

...y chairs are in the classroom", :default => 1 p.option :room_number, "select room number", :default => 2, :value_in_set => [1,2,3,4] end.process! Calling the script with -h or --help will print Usage: micro-optparse-example [options] -v, --[no-]verbose turn on verbose...