nowlinuxing

# use twitter.gem earlier than 5.0.0

require "pp"
require "twitter"

# 1. Comment out oauth_token and oauth_token_secret.
# 2. Visit https://dev.twitter.com/apps/new. Get consumer_key and consumer_secret.
# 3. Execute.
# 4. Visit the Developper's site agein.
# 5. Go to "settings", and get oauth_token and oauth_token_secret.

nowlinuxing

I try to install libxml-ruby-2.3.3 at MacOSX Marvericks via gem (rbenv, Ruby-2.1.0), get below errors:

  Building native extensions.  This could take a while...
  ERROR:  Error installing libxml-ruby:
          ERROR: Failed to build gem native extension.

      /Users/***/.rbenv/versions/2.1.0/bin/ruby extconf.rb
  extconf.rb:17:in `<main>': Use RbConfig instead of obsolete and deprecated Config.
  extconf.rb:17:in `<main>': Use RbConfig instead of obsolete and deprecated Config.
  checking for socket() in -lsocket... no

nowlinuxing

http://stackoverflow.com/questions/13963404/rails-and-os-x-how-to-install-rmagick

$ cd `Magick-config --prefix`/lib
$ for f in libMagick*-*.[0-9].dylib; do ln -s $f `echo $f | sed -e 's/-.*\.dylib/.dylib/'`; done

nowlinuxing

SELECT id, name FROM users INTO OUTFILE work/users.tsv

nowlinuxing

# spec/support/database_rewinder.rb

RSpec.configure do |config|
  config.before(:suite) do
    DatabaseRewinder['test']

    Octopus.config[Rails.env].each do |shard, shard_config|
      DatabaseRewinder.cleaners << DatabaseRewinder::Cleaner.new(
        config:          shard_config,
        connection_name: shard,

nowlinuxing

#!/bin/sh

DB="some_db"
DB_USER="user"
DB_PASS="pass"

TABLE="users"
CSV_FILE="/tmp/users.csv"
N_RECORD=1000000

nowlinuxing

1. Installation

• Download DMG
  • http://docs.fluentd.org/ja/articles/install-by-dmg
• Launch
  • sudo launchctl load /Library/LaunchDaemons/td-agent.plist
    • less /var/log/td-agent/td-agent.log
• Post Sample Log
  • curl -X POST -d 'json={"json":"message"}' http://localhost:8888/debug.test
• Send to S3

nowlinuxing

# AWS SDK v1
require 'aws-sdk'

AWS.config(:access_key_id => 'foo', :secret_access_key => 'bar')
s3 = AWS::S3.new
key = "path/to/src"
s3.buckets['src_bucket'].objects.with_prefix(key).each do |o|
  o.copy_to(o.key, bucket_name: "dst_bucket")
end

nowlinuxing

require 'aws-sdk'

client = Aws::S3::Client.new(
  access_key_id: "your_access_key_id",
  secret_access_key: "your_access_key",
)
s3.list_objects(bucket: "your-bucket", prefix: "path/to/folder", delimiter: "/").common_prefixes.map(&:prefix)

nowlinuxing

# Proc#call vs. yield - PB memo <http://d.hatena.ne.jp/nagachika/20111105/proc_call_versus_yield>

require 'benchmark'

n = 1_000_000

def m1
  yield :m1
end