Skip to content
master
Go to file
Code

Files

Permalink
Failed to load latest commit information.
Type
Name
Latest commit message
Commit time
 
 
lib
 
 
src
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

README.md

Abacus Build status

A parser for mathematical expressions.

https://hex.pm/packages/abacus

Usage

Abacus.eval(expression, scope)

Parses and evaluates the given expression. Variables can be supplied as a map of binaries in the scope.

Examples

iex> Abacus.eval("1 + 1")
{:ok, 2}
iex> Abacus.eval("sin(floor(3 + 2.5)) / 3")
{:ok, -0.3196414248877128}
iex> Abacus.eval("a * b", %{"a" => 10, "b" => 10})
{:ok, 100}

Abacus.parse(expression)

Parses the expression and returns the syntax tree.

Features

An incomplete list of supported and planned features

  • basic operators (+, -, *, /, ^)
  • factorial (!)
  • bitwise operators (|, &, >>, <<, ~, |^ (xor))
  • support for functions
    • trigonometric functions(sin, cos, tan)
    • floating point manipulation(ceil, floor, round)
  • support for variables
  • support for parsing units
  • support for converting units

Installation

  1. Add abacus to your list of dependencies in mix.exs:
```elixir
def deps do
  [{:abacus, "~> 0.4.2"}]
end
```
  1. Ensure abacus is started before your application:
```elixir
def application do
  [applications: [:abacus]]
end
```

About

Parses and evaluates mathematical expressions in Elixir. Inspired by math.js

Topics

Resources

License

Packages

No packages published