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How do I extract a sub-hash from a hash?
...h1 = {:a => :A, :b => :B, :c => :C, :d => :D}
h2 = h1.select {|key, value| [:b, :d, :e, :f].include?(key) } # => {:b=>:B, :d=>:D}
h1 = Hash[h1.to_a - h2.to_a] # => {:a=>:A, :c=>:C}
And if you want to patch that into the Hash class:
class Hash
def extract_subhash(...
How do you remove Subversion control for a folder?
...older, c:\websites\test , and it contains folders and files that were checked out from a repository that no longer exists. How do I get Subversion to stop tracking that folder and any of the subfolders and files?
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good example of Javadoc [closed]
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How about the JDK source code, but accessed through a 3rd party like docjar? For example, the Collections source.
That way, there's no big download.
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Remove and Replace Printed items [duplicate]
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gg349
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answered Mar 13 '11 at 18:20
KeithKeith
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How to print a linebreak in a python function?
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You have your slash backwards, it should be "\n"
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Is there already a Google+ API? [closed]
I would like to know if there is already a Google+ API available to the developers. I have not yet found something?
9 Answ...
Create directory if it does not exist
...at\May\Or\May\Not\Exist
You can use Test-Path -PathType Container to check first.
See the New-Item MSDN help article for more details.
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What is :: (double colon) in Python when subscripting sequences?
I know that I can use something like string[3:4] to get a substring in Python, but what does the 3 mean in somesequence[::3] ?
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Python - How to sort a list of lists by the fourth element in each list? [duplicate]
I would like to sort the following list of lists by the fourth element (the integer) in each individual list.
2 Answers
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Samples of Scala and Java code where Scala code looks simpler/has fewer lines?
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Let's improve stacker's example and use Scala's case classes:
case class Person(firstName: String, lastName: String)
The above Scala class contains all features of the below Java class, and some more - for example it supports pattern matchi...