distcalc

Distributed Ruby Calculator

Distcalc

A simple distributed calculator for basic arithmetic. Resolve simple math expression of +,-,*,/ with () to enforce precedence.

Installation

Add this line to your application's Gemfile:

gem 'distcalc'

And then execute:

$ bundle

Or install it yourself as:

$ gem install distcalc

Usage

Simple usage:

$ distcalc
  usage: distcalc calc [--verbose] [-s[=<uri|ip>]] [<math_expr>]
     or: distcalc eval-server [--verbose] -t[=<add|sub|mul|div>] [--port=[=<port>]]
     or: distcalc calc-server [--verbose] [-p[=<port>]] <config-file>
     or: distcalc --version

  when math_expr is not passed, it reads from stdin
  when -s|--server is not passed, it uses localhost
  when -p|--port of eval-server is not passed, it uses 3741
  when -p|--port of calc-server is not passed, it uses 6416
  when config-file is not passed, it reads from stdin

  config-file is a YAML file using the following structure:
  ----------
  add: { server: <URL>, port: <PORT>}
  sub: { server: <URL>, port: <PORT>}
  mul: { server: <URL>, port: <PORT>}
  div: { server: <URL>, port: <PORT>}
  ----------

  use --verbose to Debug and Trace Operations

Simple Expression :

$ distcalc --server=mycalc.server.com:1234 5 + 3 * 2 + (3 - 5)
  9

or from a file to a file:

$ echo 1 + 2 + 3 + 4 + 5 > math.txt
$ distcalc < math_expr.txt > math_result.txt
$ cat math_result.txt
  15

Create calc server:

$ distcalc calc-server -p 8080 < eval_servers.yaml

Create an operator server:

$ distcalc eval-server -t add -p 54321

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request