iwazer

params = {'key'=>'apikey', 'code'=>'01234', 'start'=>0, 'rows'=>0}
params.map{|k,v| "#{k}=#{v}"}.join('&')
# => "key=apikey&code=01234&start=0&rows=0"

iwazer

params = {key:'apikey', code:'01234', start:0, rows:0}
("#{k}=#{v}" for k, v of params).join('&')
# => 'key=apikey&code=01234&start=0&rows=0'

iwazer

open /Library/Documentation/Jenkins/command-line-preferences.html

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sudo launchctl unload /Library/LaunchDaemons/org.jenkins-ci.plist
sudo launchctl load /Library/LaunchDaemons/org.jenkins-ci.plist

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<dict>
  <key>JENKINS_HOME</key>
  <string>/Users/Shared/Jenkins/Home</string>
</dict>

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sudo mkdir /Users/Shared/Jenkins/Home
sudo chown daemon /Users/Shared/Jenkins/Home
sudo chgrp daemon /Users/Shared/Jenkins/Home

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defaults write /Library/Preferences/org.jenkins-ci httpPort 18080
defaults write /Library/Preferences/org.jenkins-ci ajp13Port 18009
defaults write /Library/Preferences/org.jenkins-ci heapSize 128m

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require 'rmagick'
require 'aws/s3'

AWS::S3::Base.establish_connection!(:access_key_id=>'<YOUR_ID>', :secret_access_key=>'<YOUR_SECRET>')
AWS::S3::DEFAULT_HOST.replace 's3-ap-northeast-1.amazonaws.com' # if use Tokyo Region
img = Magick::ImageList.new('path/to/file.jpg')
AWS::S3::S3Object.store('filename_thumb_m.jpg', img.thumbnail(640,480).to_blob {self.quality=92}, '<bucket-name>')
AWS::S3::S3Object.store('filename_thumb_s.jpg', img.thumbnail(160,120).to_blob {self.quality=92}, '<bucket-name>')
# １時間したらアクセス出来ないURLをゲット
puts AWS::S3::S3Object.url_for('filename_thumb_m.jpg', '<bucket-name>', :expires_in=>3600)

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a = [1,2,3,4,5]
n for n in a when n!=3

iwazer

# gem install awesome_print

require 'ap'
h = {:a=>1, :b=>2, :c=>[1,2,3], :d=>'foobar', :e=>{:x=>100,:y=>200}}
ap h
# =>
{
    :a => 1,
    :b => 2,
    :c => [