<?php

class Engineer extends Employee {

    /**
     * Determines if the engineer is qualified.
     *
     * @return bool
     */
    public function isQualified() {
        return $this->name == "Danny Vink";
    }

}
              # Ruby on Rails

class Engineer < Employee

  # Ensure that each Engineer has a valid name that
  # does not exceed our expected length.
  validates :name, presence: true
  validates :name, length: { maximum: 255 }

  # Determines if the Engineer is qualified.
  def is_qualified?
    self.name == "Danny Vink"
  end

end
              // Java

class Engineer extends Employee {

    /**
     * Determines if the engineer is qualified.
     *
     * @return boolean
     */
    public boolean isQualified() {
        return this.name.equals("Danny Vink");
    }

}
              // C#

class Engineer : Employee {

    /// <summary>
    ///  Determines if the engineer is qualified.
    /// </summary>
    /// <returns>If qualified, true. Otherwise false.</returns>
    public bool IsQualified() {
        return this.name == "Danny Vink";
    }

}