Module: ArrayHelper

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

Instance Method Summary collapse

Instance Method Details

#average ⇒ Object

Use the sum and divide by the size of the array. 0 if no element.



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

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

#averagef ⇒ Object

Same than average but use to_f instead of to_i



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# File 'lib/rubyhelper/arrayhelper.rb', line 43

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

#compacti ⇒ Object

The Same as compact but remove empty string too



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# File 'lib/rubyhelper/arrayhelper.rb', line 72

def compacti
  return self.map{|e| e = nil if e == "" ; e}.compact
end

#compacti! ⇒ Object 



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# File 'lib/rubyhelper/arrayhelper.rb', line 75

def compacti!
  return self.replace(self.compacti)
end

#joini(sep) ⇒ Object

This function return a pretty good string. Like join but with an array You can use an array as separator : [“,”, “ ”] will successively ‘,’ and ‘ ’ Exemple : [“a”, “b”, “c”].joini([“x”, “y”]) => “axbyc”

Errors

ArgumentError : if sep in not an array

Params

sep: (Array) array of separator

Returns

str: (String) string joined

Raises:

  • (ArgumentError) 


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# File 'lib/rubyhelper/arrayhelper.rb', line 14

def joini sep
  raise ArgumentError, 'Argument is not an array' unless sep.is_a? Array
  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..-2]
end

#maxs(n = 1) ⇒ Object

get the n higher values of the array

Errors

ArgumentError : if n in not an integer

Params

n: (Integer) number of elements

Raises:

  • (ArgumentError) 


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# File 'lib/rubyhelper/arrayhelper.rb', line 52

def maxs(n=1)
  raise ArgumentError, 'Argument is not an integer' unless n.is_a? Integer
  n = 1 if n < 1
  n = self.size if n > self.size
  return Array(self.sort[(-n)..(-1)])
end

#mins(n = 1) ⇒ Object

get the n lower values of the array

Errors

ArgumentError : if n in not an integer

Params

n: (Integer) number of elements

Raises:

  • (ArgumentError) 


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# File 'lib/rubyhelper/arrayhelper.rb', line 64

def mins(n=1)
  raise ArgumentError, 'Argument is not an integer' unless n.is_a? Integer
  n = 1 if n < 1
  n = self.size if n > self.size
  return Array(self.sort[0..(n-1)])
end

#sum ⇒ Object

Do the sum of an array of integer. if there is not integer, it will do a to_s.to_i of the element to try find an integer in the element. else, replace by a simple 0



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# File 'lib/rubyhelper/arrayhelper.rb', line 28

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

#sumf ⇒ Object

lke sum by with a to_f instead of to_i



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# File 'lib/rubyhelper/arrayhelper.rb', line 33

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