- 授权协议: LGPL
- 开发语言: Ruby
- 操作系统: 跨平台
- 软件首页: http://www.kiba-etl.org/
- 软件文档: https://github.com/thbar/kiba
软件介绍
Kiba 是一个轻量级的 Ruby 的 ETL 框架。
作业定义 xxx.etl:
# declare a ruby method here, for quick reusable logic def parse_french_date(date) Date.strptime(date, '%d/%m/%Y') end # or better, include a ruby file which loads reusable assets # eg: commonly used sources / destinations / transforms, under unit-test require_relative 'common' # declare a pre-processor: a block called before the first row is read pre_process do # do something end # declare a source where to take data from (you implement it - see notes below) source MyCsvSource, 'input.csv' # declare a row transform to process a given field transform do |row| row[:birth_date] = parse_french_date(row[:birth_date]) # return to keep in the pipeline row end # declare another row transform, dismissing rows conditionally by returning nil transform do |row| row[:birth_date].year < 2000 ? row : nil end # declare a row transform as a class, which can be tested properly transform ComplianceCheckTransform, eula: 2015 # before declaring a definition, maybe you'll want to retrieve credentials config = YAML.load(IO.read('config.yml')) # declare a destination - like source, you implement it (see below) destination MyDatabaseDestination, config['my_database'] # declare a post-processor: a block called after all rows are successfully processed post_process do # do something end
执行作业:bundle exec kiba my-data-processing-script.etl
Approximation Algorithms
Vijay V. Vazirani / Springer / 2001-07-02 / USD 54.95
'This book covers the dominant theoretical approaches to the approximate solution of hard combinatorial optimization and enumeration problems. It contains elegant combinatorial theory, useful and inte......一起来看看 《Approximation Algorithms》 这本书的介绍吧!