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Why can Java Collections not directly store Primitives types?
... me when it autoboxes. (For all I know, it may now, I wrote this answer in 2010).
A good explanation on SO about boxing: Why do some languages need Boxing and Unboxing?
And criticism of Java generics: Why do some claim that Java's implementation of generics is bad?
In Java's defense, it is easy ...
Finding # occurrences of a character in a string in Ruby
...just want the number of a's:
puts "Melanie is a noob".count('a') #=> 2
Docs for more details.
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C# - What does the Assert() method do? Is it still useful?
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201
In a debug compilation, Assert takes in a Boolean condition as a parameter, and shows the erro...
Scala best way of turning a Collection into a Map-by-key?
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234
You can use
c map (t => t.getP -> t) toMap
but be aware that this needs 2 traversals....
How to empty a Heroku database
...eed) into one action by executing this:
$ heroku run rake db:setup
Edit 2014-04-18: rake db:setup doesn't work with Rails 4, it fails with a Couldn't create database error.
Edit 2014-10-09: You can use rake db:setup with Rails 4. It does give you a Couldn't create database error (because the dat...
'python' is not recognized as an internal or external command [duplicate]
So I have recently installed Python Version 2.7.5 and I have made a little loop thing with it but the problem is, when I go to cmd and type python testloop.py I get the error:
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How to resize an image with OpenCV2.0 and Python2.6
I want to use OpenCV2.0 and Python2.6 to show resized images. I used and adopted this example but unfortunately, this code is for OpenCV2.1 and does not seem to be working on 2.0. Here my code:
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Has anyone ever got a remote JMX JConsole to work?
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How to find the files that are created in the last hour in unix
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216
If the dir to search is srch_dir then either
$ find srch_dir -cmin -60 # change time
or
$ ...