jgomo3

import heapq

def top(n, col, key=None):
  return heapq.nsmallest(n, col, key)


# Alternative, descent only for small n.
from itertools import count

def top_small_n(n, col, key=None):

jgomo3

from collections import Counter

def even_word(word):
    return sum(1 for w, n in Counter(word).items() if n%2 != 0)

jgomo3

'''
>>> periodos = [(3, 5), (7, 8), (11, 12), (-10, -1), (6, 10), (-2, 2)]
>>> periods_intersection((3, 5), (7, 8))
>>> periods_intersection((7, 8), (6, 10))
(7, 8)
>>> periods_intersection((-10, -1), (-2, 2))
(-2, -1)
>>> periods_union((-10, -1), (-2, 2))
(-10, 2)
>>> periods_union((6, 10), (7, 8))

jgomo3

'''
Defines the function serie, which...
From an starting point generates all the values following
by the given period.
It works with numbers, anything that support adding or
anything that support the optional binary opperation
provided.
>>> ns = serie(10, 4)
>>> next(ns); next(ns); next(ns)
10

jgomo3

import ipaddress

def ip_in_sn(ip_str, sn_str):
    ip = ipaddress.ip_address(ip_str)
    sn = ipaddress.ip_network(sn_str)
    return ip in sn

if __name__ == '__main__':
    ip = '192.0.2.1'
    sn = '192.0.2.0/24'

jgomo3

-- Pre: The names of the relations to consider are in a relation named nodes in
--      the public schema (it could be parametrized)

SELECT
    tc.table_name watcher
  , ctu.table_name target
FROM
             information_schema.table_constraints tc
  INNER JOIN information_schema.constraint_table_usage ctu ON tc.constraint_name = ctu.constraint_name
  INNER JOIN nodes pt ON tc.table_name = pt."name"

jgomo3

README

Services declared as oneshot are expected to take some action and exit immediatelly (thus, they are not really services, no running processes remain). A common pattern for these type of service is to be defined by a setup and a teardown action.

Let's create a example foo service that when started creates a file, and when stopped it deletes it.

Define setup/teardown actions

Create executable file /opt/foo/setup-foo.sh:

jgomo3

/*
 * Copyright (c) 1995, 2008, Oracle and/or its affiliates. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *

jgomo3

module Notification
  def self.publisher_worker_class(klass)
    Class.new do
      include(Sidekiq::Worker, Wisper::Publisher)
      sidekiq_options(:queue => :report)
      define_method :perform do |*args, **kwargs|
        success = false
        begin
          context = klass.new.perform(*args, **kwargs)
          broadcast(:deliveried_report_delivery, context)

jgomo3

;; Code folding
(add-hook 'ruby-mode-hook
          (lambda () (hs-minor-mode)))

(eval-after-load "hideshow"
  '(add-to-list 'hs-special-modes-alist
                `(ruby-mode
                  ,(rx (or "def" "class" "module" "do" "{" "[")) ; Block start
                  ,(rx (or "}" "]" "end"))                       ; Block end
                  ,(rx (or "#" "=begin"))                        ; Comment start