Module: ArrayHelper

Included in:
Array
Defined in:
lib/rubyhelper/arrayhelper.rb

Instance Method Summary collapse

Instance Method Details

#average ⇒ Object 



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# File 'lib/rubyhelper/arrayhelper.rb', line 42

def average
  return (self.size > 0) ? (self.sum / self.size) : (0)
end

#averagef ⇒ Object 



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# File 'lib/rubyhelper/arrayhelper.rb', line 46

def averagef
  return (self.size > 0) ? (self.sumf / self.size.to_f) : (0.0)
end

#maxs(n = 1) ⇒ Object

TODO benchmark with sort{|e| -e}



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# File 'lib/rubyhelper/arrayhelper.rb', line 51

def maxs(n=1)
  return Array(self.sort[(-n)..(-1)])
end

#sum ⇒ Object 



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# File 'lib/rubyhelper/arrayhelper.rb', line 34

def sum
  return (self.size > 0) ? (self.map{|e| e.to_s.to_i}.reduce(:+)) : (0)
end

#sumf ⇒ Object 



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# File 'lib/rubyhelper/arrayhelper.rb', line 38

def sumf
  return (self.size > 0) ? (self.map{|e| e.to_s.to_f}.reduce(:+)) : (0.0)
end

#to_clean_s(sep = ' ') ⇒ Object

A simple function like to_s(), but return a clean String for exemple :

[1,2,3].to_clean_s(" ; ")

> “1 ; 2 ; 3”

Parameters:

sep:
A String to separe each element (or an Array, see to_clean_s_with_array)



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# File 'lib/rubyhelper/arrayhelper.rb', line 12

def to_clean_s(sep=' ')
  return to_clean_s_with_array(sep) if sep.is_a?Array
  to_clean_s_with_string(sep.to_s)
end

#to_clean_s_with_array(sep) ⇒ Object

You can use an array as separator : [“,”, “ ”] will successively ‘,’ and ‘ ’



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# File 'lib/rubyhelper/arrayhelper.rb', line 24

def to_clean_s_with_array sep
  str = String.new
  i = 0
  self.each do |e|
    str = str + e.to_s + sep[i % sep.size].to_s
    i += 1
  end
  return str[0..(-sep.size - 1)]
end

#to_clean_s_with_string(sep) ⇒ Object 



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# File 'lib/rubyhelper/arrayhelper.rb', line 17

def to_clean_s_with_string sep
  str = String.new
  self.each{|e| str = str + e.to_s + sep.to_s}
  return str[0..(-sep.size - 1)]
end