jdesilvio / elixir-dfs

Elixir app that constructs optimal lineups for daily fantasy sports leagues

DailyFantasy

Daily fantasy sports lineup optimizer.

Data

Player data must be in the _data directory. File names should be a CSV named after the league that the players are in (i.e. nba.csv, nfl.csv, etc.)

Mandatory columns are:

• First Name
• Last Name
• Position
• FPPG
• Salary
• Team
• Opponent
• Injury Indicator
• Injury Details

Use in iEx:

# Register players
DailyFantasy.Import.register(:nba)

# Create lineups
data = DailyFantasy.Lineups.create_lineups(:FanduelNBA)

# Print lineups
data |>
Enum.take(2) |>
Enum.map(&DailyFantasy.Lineups.Lineup.print/1)

---

Release Notes:

Release 0.1.3 aka Darrell Green:

• ~23% speed improvement by using integers for player point projections instead of floats

Release 0.1.2 aka Grayson "The Professor" Boucher:

• 100% test coverage (per coveralls)
• Minor refactoring

Release 0.1.1 aka Tim Duncan:

• ~15% speed improvement by optimizing data types for lineup creation
• Invalid input handling

Release 0.1.0 aka William "The Refrigerator" Perry:

• A player registry is created as an ETS table upon initialization
• Player data is stored in player registry
• ~10% speed improvement by caching player data and minimizing lineup payload during lineup creation and optimization

Release 0.0.3 aka Lew Alcindor:

• Implemeted Fanduel NBA lineup creation
• Implemented a general way to create lineups by specifying the lineup as an atom; for example :FanduelNFL specifies the structure for Fanduel NFL contests

Release 0.0.2 aka Barry Sanders:

• Improved speed
• Organized modules

Release 0.0.1 aka Joe Namath:

Brute force script. I went at this the same way I'd write a Python script or any other "procedural" script in an Object Oriented language. The data gets imported and goes through a series of steps until it is transformed into the desired output. There is no utilization of any of the Elixir nicities (maybe Stream concurrency) or other advantages of Functional programming.