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How to reverse a 'rails generate'
I want to delete all the files it created and roll back any changes made, but not necessarily to the database, but more to the config files.
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Distinct() with lambda?
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IEnumerable<Customer> filteredList = originalList
.GroupBy(customer => customer.CustomerId)
.Select(group => group.First());
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Difference between style = “position:absolute” and style = “position:relative”
...ive positioning, on the other hand, is just like stating no positioning at all, but the left, right, top and bottom attributes "nudge" the element out of their normal layout. The rest of the elements on the page still get laid out as if the element was in its normal spot though.
For example, if I h...
How to redirect to a dynamic login URL in ASP.NET MVC
...o good reason you shouldn't), something at the end of the day is going to call FormsAuthentication.RedirectToLoginPage() which is going to look at the one configured URL. There's only one login URL, ever, and that's just how they designed it.
My stab at the problem (possibly a Rube Goldberg impleme...
What is a method group in C#?
...ng format), etc - hence ToString by itself is a "method group".
It can usually convert a method group to a (typed) delegate by using overload resolution - but not to a string etc; it doesn't make sense.
Once you add parentheses, again; overload resolution kicks in and you have unambiguously identi...
How to prevent open last projects when intellij idea start
...actual path may vary depending upon which version of IntelliJ you have installed eg.
IntelliJIdea2016.1/ IntelliJIdea2016.2/ IntelliJIdea2016.3/
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How to set different label for launcher rather than activity title?
This question has been asked before - but with no satisfying answer at all! So I'm trying it again.
8 Answers
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Re-entrant locks in C#
.....} is shorthand for using the Monitor class. As Marc points out, Monitor allows re-entrancy, so repeated attempts to lock on an object on which the current thread already has a lock will work just fine.
If you start locking on different objects, that's when you have to be careful. Pay particular ...
Uniq by object attribute in Ruby
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Do it on the database level:
YourModel.find(:all, :group => "status")
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Is there a command like “watch” or “inotifywait” on the Mac?
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fswatch
fswatch is a small program using the Mac OS X FSEvents API to monitor a directory.
When an event about any change to that directory is received, the specified
shell command is executed by /bin/bash
If you're on GNU/Linux,
inotifywatch (par...