Write a program that will take a string of digits and give you all the contiguous substrings of length n in that string.
For example, the string "49142" has the following 3-digit series:
- 491
- 914
- 142
And the following 4-digit series:
- 4914
- 9142
And if you ask for a 6-digit series from a 5-digit string, you deserve whatever you get.
Note that these series are only required to occupy adjacent positions in the input; the digits need not be numerically consecutive.
For installation and learning resources, refer to the exercism help page.
For running the tests provided, you will need the Minitest gem. Open a terminal window and run the following command to install minitest:
gem install minitest
If you would like color output, you can require 'minitest/pride' in
the test file, or note the alternative instruction, below, for running
the test file.
In order to run the test, you can run the test file from the exercise
directory. For example, if the test suite is called
hello_world_test.rb, you can run the following command:
ruby hello_world_test.rb
To include color from the command line:
ruby -rminitest/pride hello_world_test.rb
The test files may have the execution bit set so you may also be able to run it like this:
./hello_world_test.rb
A subset of the Problem 8 at Project Euler http://projecteuler.net/problem=8