Module: HashMultiTool

Defined in:
lib/hash_multi_tool.rb,
lib/hash_multi_tool/version.rb

Constant Summary collapse

VERSION = 
"0.1.5"

Class Method Summary collapse

Class Method Details

.collect_keys(h_object) ⇒ Object 



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# File 'lib/hash_multi_tool.rb', line 18

def collect_keys h_object
  if h_object.is_a? Hash
    (h_object.keys + collect_keys(h_object.values)).flatten.uniq
  elsif h_object.is_a? Array 
    h_object.collect{|value| collect_keys value}
  else
    []
  end
end

.select_by_key_value(hash = [], key = [], value = nil) ⇒ Object 



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# File 'lib/hash_multi_tool.rb', line 14

def select_by_key_value hash = [], key = [], value = nil
	hash.select { |h| h[key] == value }
end

.sort_asc(hash) ⇒ Object 



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# File 'lib/hash_multi_tool.rb', line 46

def sort_asc hash
			Hash[hash.sort_by {|k, v| v}]
end

.sort_by_order(hash = [], order = [], direction = 'ASC') ⇒ Object 



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# File 'lib/hash_multi_tool.rb', line 5

def sort_by_order hash = [], order = [], direction ='ASC'
  hash.sort do |a,b|
    a_arr = []
	  b_arr = []
    order.each{|key| a_arr << a[key]; b_arr << b[key];}
    direction.downcase == "desc" ? b_arr <=> a_arr : a_arr <=> b_arr 
	end
end

.sort_desc(hash) ⇒ Object 



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# File 'lib/hash_multi_tool.rb', line 42

def sort_desc hash
	Hash[hash.sort_by {|k, v| -v}]
end

.transpose_to_array(hash = {}) ⇒ Object 



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# File 'lib/hash_multi_tool.rb', line 35

def transpose_to_array hash = {}
	hash.inject([]){|a, (k,vs)| 
	  vs.each_with_index{|v,i| (a[i] ||= {})[k] = v} 
	  a
	}
end

.transpose_to_hash(arr = []) ⇒ Object 



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# File 'lib/hash_multi_tool.rb', line 28

def transpose_to_hash arr = []
	arr.inject({}){|a, h| 
		h.each_pair{|k,v| (a[k] ||= []) << v}
		a
	}
end

.values_to_percentage(hash) ⇒ Object 



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# File 'lib/hash_multi_tool.rb', line 50

def values_to_percentage hash
  if (hash.values.map{|val| val.is_a? Fixnum || Float }).all? {|boolean| boolean == true}
    sum = hash.values.inject 0, :+
    hash.each { |k,v| hash[k] = (v*100/sum.to_f).round(2) }
  else
    'Percentage can only be calculated for numbers or decimals'
  end
end