カーネギーメロンのDBに関する講義が面白いのでおすすめ - だいたいよくわからないブログ
ここに書くことによって途中でやめられなくするメソッドです。 ハッカーニュースを眺めていたら以下のようなCS系講義動画のまとめリポジトリが流れていました。 GitHub - Developer-Y/cs-video-courses: List of Computer Science courses with video lectures. へーっと思いながら何個かポチってみたところ以下に出くわしました。 15721.courses.cs.cmu.edu 英語が（自分にとって）聞き取りやすく、動画の品質（画質やスライドがちゃんと見えるかどうかといった部分）も良いものでかつ興味のある内容で出来ればスライドもおしゃれで・・・となるとなかなか少ないですが、これはかなり見やすいです。 スライドも概念図が頻繁に登場したりして、これだけでも聞き取れなかった部分などをかなり補完できます。 スケジュールページ
Optimizing Rails for Memory Usage Part 3: Pluck and Database Laziness | Collective Idea
Optimizing Rails for Memory Usage Part 3: Pluck and Database Laziness This is part three in a four-part series on optimizing a potentially memory-heavy Rails action without resorting to pagination. The posts in the series are: Part 1: Before You Optimize Part 2: Tuning the GC Part 3: Pluck and Database Laziness Part 4: Lazy JSON Generation and Final Thoughts Pluck the Chicken If changing Ruby’s GC
Rails Multi-Database Best Practices Roundup - CustomInk Technology Blog
Seamless second database integration for Rails. 2016-01-11: We just finished a new version of SecondBase, our own gem that provides support for Rails to manage dual databases by extending ActiveRecord tasks that create, migrate, and test your application. It supports Rails 4.x and up. Check it out on GitHub. Since landing my first job programming with Ruby, most Rails applications I have worked wi
CodernityDB pure python, fast, NoSQL database — CodernityDB
CodernityDB pure python, fast, NoSQL database¶ CodernityDB is opensource, pure Python (no 3rd party dependency), fast (even 100 000 insert and more than 100 000 get operations per second, check Speed if you don’t believe in words), multi platform, schema-less, NoSQL database. You can also call it a more advanced key-value database, with multiple key-values indexes in the same engine (for sure it’s
R3 by heynemann
r³ is a map-reduce engine written in python using redis as a backend View project onGitHub r³ r³ is a map reduce engine written in python using a redis backend. It's purpose is to be simple. r³ has only three concepts to grasp: input streams, mappers and reducers. The diagram below relates how they interact: If the diagram above is a little too much to grasp right now, don't worry. Keep reading an
A Simple SqlAlchemy 0.7 / 0.8 Tutorial - Mouse Vs Python
A couple years ago I wrote a rather flawed tutorial about SQLAlchemy. I decided it was about time for me to re-do that tutorial from scratch and hopefully do a better job of it this time around. Since I’m a music nut, we’ll be creating a simple database to store album information. A database isn’t a database without some relationships, so we’ll create two tables and connect them. Here are a few ot
UsefulModules - Python Wiki
Useful Modules, Packages and Libraries The intent of this page is to list some of the most commonly used Python modules, in the hope that it will provide useful recommendations for other programmers (especially beginners). Remember that in addition to the listings below, there are other directories of Python modules - see PublishingPythonModules for details. Another collection of library details c
SQLAlchemyとpeeweeの比較 - PYTHONIC BOOM BOOM HEAD
とりあえず導入部分だけざっくりと。 データベースへの接続 SQLAlchemy from sqlalchemy import create_engine engine = create_engine('sqlite:///:memory:', echo=True) peewee from peewee import SqliteDatabase engine = SqliteDatabase('db.sqlite') engine.connect() peeweeでsqlite:///:memory:する方法はめんどくさくて調べてません... ※2012.1.15 追記 peewee.SqliteDatabase(":memory:")でいけた モデルの定義 SQLAlchemy from sqlalchemy import Column, Integer, String, BOOLEAN
The State of Ruby ORM
UPDATE: DataMapper 2 was renamed to Ruby Object Mapper (ROM). For more info check out rom-rb.org We have a lot of different Object-Relational Mapper implementations in Ruby (and a ton and a half of Mongo mappers ;)) and it’s probably a good thing. It seems like the only ORM that really matters right now is ActiveRecord although in “the background” we still have DataMapper and Sequel with growing c
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Database smells