System wartości

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Truth = Honesty
Love = Compassion
Courage = Valor
Truth + Love = Justice
Truth + Courage = Honor
Love + Courage = Sacrifice
Truth + Love + Courage = Spirituality
The absence of Truth, Love, and Courage is Pride, the opposite of which is Humility.

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Ruby vs Kotlin: Custom Comparable classes

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Often it's nice to be able to sort custom objects and compare which one is bigger or smaller. Today we are going to implement such MyDate class in Ruby and Kotlin. I found it interesting that interfaces in Kotlin, similarly to modules in Ruby, can contain an implementation. Let's see a very simple example.

First in Ruby:

class MyDate < Struct.new(:year, :month, :day_of_month)
  include Comparable

  def <=>(other)
    diff_year = year - other.year
    return diff_year if diff_year.nonzero?

    diff_month = month - other.month
    return diff_month if diff_month.nonzero?

    day_of_month - other.day_of_month
  end
end

def check_in_range(date, first, last)
  Range.new(first, last).cover?(date)
end


and now in Kotlin.

data class MyDate(
  val year: Int, 
  val month: Int, 
  val dayOfMonth: Int
) : Comparable {
    override operator fun compareTo(other: MyDate): Int {
        val diffYear = year - other.year
        if (diffYear != 0) { return diffYear }

        val diffMonth = month - other.mo…
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re-enable tray icons in ubuntu 13.10?

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sudo apt-get install libappindicator1
sudo add-apt-repository ppa:mc3man/systray-white
sudo apt-get update; sudo apt-get dist-upgrade gsettings set com.canonical.Unity.Panel systray-whitelist "['all']" # log in again
More on this sad subject: https://bugs.launchpad.net/ayatana-design/+bug/974480https://bugs.launchpad.net/ayatana-ubuntu/+bug/1119420http://askubuntu.com/questions/362135/how-to-re-enable-tray-icons-for-applications-in-ubuntu-13-10https://launchpad.net/~mc3man/+archive/systray-whitehttp://www.ubuntugeek.com/ubuntu-tip-simplified-way-to-add-ppa-repositories-in-karmic.html
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