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# Given an array
arr = [1, 2, 3]

# I want to build an hash starting from an array
# like { 1 => 1, 2 => 4, 3 => 9} (where the values are the square of keys)

# long form:
hash = {}
arr.each do |e|
  hash[e] = e**2

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# file: mongoid.yml
default:
  sessions:
    production:
      database: foobar
      hosts:
        - localhost:27017


# file: mongoid.rb

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Write the file q1.txt:
query=
<!DOCTYPE Query>
<Query client="true" processor="TSV" limit="100" header="1">
     <Dataset name="hsapiens_snp" config="snp_1_config">
          <Filter name="chr_name" value="22"/>
          <Filter name="chrom_start" value="1"/>
          <Filter name="chrom_end" value="80000000"/>
    
          <Attribute name="refsnp_id"/>

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Routes file (routes.rb):

resources :data_loaders do
  collection do
    delete 'multiple_destroy'
  end
end

The controller:

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# Given two 'linked' array, you want to sort one and reorder the second to preserve the same sequence of the first:

a = [3,2,7,5,1,9,3]
b = [:a, :b, :c, :d, :e, :f, :g]

def a.sort_with(arr)
  raise "the two array must have the same size" if size!=arr.size
  h = self.collect.with_index{|e,i| [e, arr[i]]}.sort{|x,y| y.first<=>x.first}
  [h.map{|e| e.first}, h.map{|e| e.last}]
end

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FIXME:
  WARNING: Nokogiri was built against LibXML version 2.7.3, but has dynamically loaded 2.7.8
                  or
  ERROR -: Incompatible library version: nokogiri.bundle requires version 11.0.0 or later, but libxml2.2.dylib provides version 10.0.0


gem uninstall nokogiri libxml-ruby
 
brew update
brew uninstall libxml2

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# NOTE below gems are only for development purpose can be removed and commented out as per requirement
group :development do
  gem 'rails-erd','1.0.0'
  gem 'hirb','0.7.0'
  gem 'railroady'
  gem 'itslog','0.6.1'
  gem 'quiet_assets'
  gem 'sextant' # now included in Rails 4.0
end

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module Zo
  extend ActiveSupport::Concern

  included do
    # ...
  end

  def an_instance_method
    # ...
  end

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Visualize the magnitude of table row values

The goal is to visualize the magnitude of table row values using histogram bars.

Languages and libraries:

• html + css
• coffescript / javascript
• d3 library

Features: