Differences in Model Validation and Saving in Rails and Ecto

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Rails is a popular Ruby Web Application Framework
Ecto is a DSL (Domain Specific Language) for database adaptors in Elixir.

A Brief Introduction to Game Theory

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Game Theory is a field shared by math and economics that aims to describe strategies and outcomes of games. A game is simply a set of possible decisions and their outcomes. While Game Theory is immediately applicable to certain board games (Tic-Tac-Toe and Chess among others), its usefulness goes far beyond into areas such as public policy and business strategy.