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        final Collection<Integer> ids =
                Collections2.filter(Lists.transform(Arrays.asList(
                        input.split(",")),
                        new Function<String, Integer>() {
                            @Override
                            public Integer apply(@Nullable final String s) {
                                return s != null ? Ints.tryParse(s) : null;
                            }
                        }), new Predicate<Integer>() {
                    @Override

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- hosts: production
  sudo: yes
  roles:
    - ntp
    - postgresql
    - nginx
    - role: deploy
      tags: deploy
      vars_prompt:
        - name: "version"

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Reproducible development environments using Vagrant

Meta: Originally published by me on the internal Statoil developer blog. (2013-11-12)

The complexity of any given development environment often grows at the same rate as the project itself.

A large project can have countless dependencies such as a web server, a database, a caching system, a queue and more. This amounts to a lot of configuration and administration overhead. Suddenly, adding a new developer to the project means spending days just installing build tools, services, libraries and other dependencies before he/she can write any code.

Each developer might also be running different operating systems and using different tools, some might run Windows, others Linux or OS X. This adds to the complexity as some dependencies might have subtle platform-specific differences and/or bugs. Developing on an OS that differs from the production OS can also lead to subtle bugs when the application is deploye

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# files/env:
Defaults env_keep += "SSH_AUTH_SOCK"

# tasks/main.yml
- name: ensure sudo keeps SSH_AUTH_SOCK in environment
  copy: src=env
        dest=/etc/sudoers.d/env
        mode=0440
        owner=root
        group=root

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---
- hosts: all
  sudo: yes
  roles:
    - role: postgresql
      tags: postgresql

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# Install vim-mode
apm install vim-mode

# Open keymap (cmd-shift-p "keymap") and add
'.vim-mode.insert-mode:not(.mini)':
  'j j': 'vim-mode:activate-command-mode'

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$ vagrant status
/Applications/Vagrant/embedded/lib/ruby/2.0.0/rubygems/version.rb:191:in `initialize': Malformed version number string virtualbox (ArgumentError)
        from /Applications/Vagrant/embedded/gems/gems/vagrant-1.5.0/lib/vagrant/box_collection.rb:273:in `new'
        from /Applications/Vagrant/embedded/gems/gems/vagrant-1.5.0/lib/vagrant/box_collection.rb:273:in `block (2 levels) in find'
        from /Applications/Vagrant/embedded/gems/gems/vagrant-1.5.0/lib/vagrant/box_collection.rb:270:in `map'
        from /Applications/Vagrant/embedded/gems/gems/vagrant-1.5.0/lib/vagrant/box_collection.rb:270:in `block in find'
        from /Applications/Vagrant/embedded/gems/gems/vagrant-1.5.0/lib/vagrant/box_collection.rb:416:in `block in with_collection_lock'
        from /Applications/Vagrant/embedded/lib/ruby/2.0.0/monitor.rb:211:in `mon_synchronize'
        from /Applications/Vagrant/embedded/gems/gems/vagrant-1.5.0/lib/vagrant/box_collection.rb:415:in `with_collection_lock'
        from /Applications

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#!/usr/bin/env python
# -*- coding: utf-8 -*-

from celery import Celery
from celery.schedules import crontab

app = Celery()
app.conf.CELERY_TIMEZONE = 'Europe/Oslo'
app.conf.CELERYBEAT_SCHEDULE = {
    'every-minute': {t

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def filter_iterable(key, iterable):
    filtered = {}
    for v in iterable:
        if v[key] not in filtered:
            filtered[v[key]] = v
    return filtered.values()

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;; result from clojure.xml/parse
{:tag :foo,
 :attrs nil,
 :content
 [{:tag :bar,
   :attrs
   {:text "some text"
    :more-text "some more text"},
   :content nil}]}