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  def max(xs: List[Int]): Int = {
    def maxOfTwo(a:Int, b:Int) = if(a>b) a else b

    def maxOfHeadAndTail(i: Int, l: List[Int]): Int = if (l.isEmpty) i else maxOfHeadAndTail(maxOfTwo(i, l.head), l.tail)

    maxOfHeadAndTail(xs.head, xs.tail)
  }

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def non_tail_recursive_factorial(n)
  if n < 2
    1
  else
    n * non_tail_recursive_factorial(n-1)
  end
end

def tail_recursive_factorial(n, r = 1)
  if n < 2

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Cheat Sheet

This cheat sheet originated from the forum, credits to Laurent Poulain. We copied it and changed or added a few things.

Evaluation Rules

• Call by value: evaluates the function arguments before calling the function
• Call by name: evaluates the function first, and then evaluates the arguments if need be

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# Path to your oh-my-zsh configuration.
ZSH=$HOME/.oh-my-zsh
HISTSIZE=1000
SAVEHIST=1000
setopt append_history
setopt inc_append_history
setopt extended_history
setopt hist_find_no_dups
setopt hist_ignore_all_dups
setopt hist_reduce_blanks

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<snippet>
  <content><![CDATA[
do
  ${1:code}
end]]></content>
  <description>do...end block</description>
  <tabTrigger>doe</tabTrigger>
  <scope>source.ruby</scope>
</snippet>

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{
  "tab_size": 2,
  "translate_tabs_to_spaces": true,
  "highlight_line": true,
  "caret_style": "wide",
  "ensure_newline_at_eof_on_save": true
}

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class UsersToPayQuery
  def self.find
    # Select users who have no errors in groups, likes and shares, have wmr and have balanse to pay.
    # A bit strange indentation. But it's easier to read this SQL in console with this indendation.
    User.where("
      NOT EXISTS(
        SELECT id FROM shares
          WHERE shares.error = 1
          AND shares.declined = false
          AND shares.user_id = users.id)

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            params = 'app_id='+ mailru.app_id +
                'ext_perm=stream' +
                'method=users.hasAppPermission' +
                'session_key=' + mailru.session.session_key +
                'url=' + encodeURIComponent(data.url)

              network_url = 'http://www.appsmail.ru/platform/api?method=users.hasAppPermission' +
                '&app_id=' + mailru.app_id +
                '&session_key=' + mailru.session.session_key +
                '&sig=' + hex_md5(mailru.session.oid + params + mailru.private_key) +

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params = 'app_id='+ mailru.app_id +
  'method=stream.share' +
  'session_key=' + mailru.session.session_key +
  'url=' + encodeURIComponent(data.url)
  
network_url = 'http://www.appsmail.ru/platform/api?method=stream.share' +
  '&app_id=' + mailru.app_id +
  '&session_key=' + mailru.session.session_key +
  '&sig=' + hex_md5(mailru.session.oid + params + mailru.private_key) +
  // '&sig=' + mailru.session.sig +

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    def check_share?(url, uid)
      # According to documentation from:
      # http://api.mail.ru/docs/reference/rest/stream.getByAuthor/
      request_url = "http://www.appsmail.ru/platform/api?" + request_params(url, uid)
      responce = HTTParty.get(request_url)
    end

    private

      def request_params(url, uid)