Chunks for the String method.

guda — Wed, 10 Sep 2008 08:59:47 +0000

If you want to generate some sort of chunks from a large strings you can use the following method.
You give as a param an array of arrays, each array is pointing with % the start position of the chunk and the last position.

class String


  def String.random_alphanumeric(size=16)

    (1..size).collect { (i = Kernel.rand(62); i += ((i < 10) ? 48 : ((i < 36) ? 55 : 61 ))).chr }.join

  end
  def chunkanize(parts = [[0,4], [48, 52], [95, 100]])

    return [self] if self.size <= 1
    # working with words

    terms_array = self.split(/ /)

    join_type = " "
    # working with letters

    if terms_array.size <= 100

      terms_array = self.split(//)

      join_type = ""

    end
    one_percent = terms_array.size.to_f / 100
    parts.collect do |part|

      start = part[0]

      stop = part[1]

      terms_array[(start * one_percent)..(stop * one_percent)].join(join_type)

    end

  end

end

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Chunks for the String method.