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Difference between two lists
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242
Using Except is exactly the right way to go. If your type overrides Equals and GetHashCode, or ...
How to express a NOT IN query with ActiveRecord/Rails?
...e this since it seems a lot of people come to this, if you are using Rails 4 look at the answers by Trung Lê` and VinniVidiVicci.
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Best way to create an empty map in Java
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243
1) If the Map can be immutable:
Collections.emptyMap()
// or, in some cases:
Collections.<...
How to generate a random string in Ruby
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34 characters and blazing fast: ('a'..'z').to_a.shuffle[0,8].join. Note you'll need Ruby >=1.9 to shuffle.
– fny
Jun 14 '12 at 17:35
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Create a GUID in Java
...l Bourque
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answered Jun 6 '10 at 1:14
Mark ByersMark Byers
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System.MissingMethodException: Method not found?
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34 Answers
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#pragma mark in Swift?
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answered Jun 4 '14 at 12:46
Frank SchmittFrank Schmitt
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Devise Secret Key was not set
I am developing a Rails 4 app using the Active Admin gem for the administration back end. Active Admin in turn uses Devise for user authentication. Now, when I try to deploy the app using capistrano on the VPS server, I get the below error:
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What's the simplest way to test whether a number is a power of 2 in C++?
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answered Sep 20 '08 at 14:45
AnonymousAnonymous
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Programmatically Hide/Show Android Soft Keyboard [duplicate]
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4 Answers
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