Given a 10 digit phone number, you m 6936 ust return all possible words or combination of words from the provided dictionary, that can be mapped back as a whole to the number.
With this we can generate numbers like 1-800-motortruck which is easier to remember then 1-800-6686787825 The phone number mapping to letters is as follows:
2 = a b c
3 = d e f
4 = g h i
5 = j k l
6 = m n o
7 = p q r s
8 = t u v
9 = w x y z
The phone numbers will never contain a 0 or 1. Words have to be at least 3 characters.
To get give you an initial verification, the following must be true:
6686787825 should return the following list [["motor", "usual"], ["noun", "struck"], ["nouns", "truck"], ["nouns", "usual"], ["onto", "struck"], "motortruck"]
2282668687 should return the following list [["act", "amounts"], ["act", "contour"], ["acta", "mounts"], ["bat", "amounts"], ["bat", "contour"], ["cat", "contour"], "catamounts"]
The conversion of a 10 digit phone number should be performed within 1000ms.
These instructions will get you a copy of the project up and running on your local machine for development and testing purposes
A step by step series of examples that tell you have to get a development env running
- Clone / Download the code.
- You may create gemset in .ruby-gemset if you want.
- Code is tested in ruby version 2.5.3. It may work in other versions as well. You can change, ruby version in .ruby-version file.
- Open terminal and cd in root directory.
- It will create gemset and will ask to install rvm version, if already not installed.
- Install bundler and gems:
gem install bundler
bundle install
rspec spec/conversion_test.rb --format documentationtime ruby lib/benchmark.rb