60 lines
2.1 KiB
Markdown
60 lines
2.1 KiB
Markdown
|
# Phone Number
|
||
|
|
|
||
|
|
Clean up user-entered phone numbers so that they can be sent SMS messages.
|
||
|
|
|
||
|
|
The **North American Numbering Plan (NANP)** is a telephone numbering system used by many countries in North America like the United States, Canada or Bermuda. All NANP-countries share the same international country code: `1`.
|
||
|
|
|
||
|
|
NANP numbers are ten-digit numbers consisting of a three-digit Numbering Plan Area code, commonly known as *area code*, followed by a seven-digit local number. The first three digits of the local number represent the *exchange code*, followed by the unique four-digit number which is the *subscriber number*.
|
||
|
|
|
||
|
|
The format is usually represented as
|
||
|
|
|
||
|
|
```text
|
||
|
|
(NXX)-NXX-XXXX
|
||
|
|
```
|
||
|
|
|
||
|
|
where `N` is any digit from 2 through 9 and `X` is any digit from 0 through 9.
|
||
|
|
|
||
|
|
Your task is to clean up differently formatted telephone numbers by removing punctuation and the country code (1) if present.
|
||
|
|
|
||
|
|
For example, the inputs
|
||
|
|
- `+1 (613)-995-0253`
|
||
|
|
- `613-995-0253`
|
||
|
|
- `1 613 995 0253`
|
||
|
|
- `613.995.0253`
|
||
|
|
|
||
|
|
should all produce the output
|
||
|
|
|
||
|
|
`6139950253`
|
||
|
|
|
||
|
|
**Note:** As this exercise only deals with telephone numbers used in NANP-countries, only 1 is considered a valid country code.
|
||
|
|
|
||
|
|
* * * *
|
||
|
|
|
||
|
|
For installation and learning resources, refer to the
|
||
|
|
[exercism help page](http://exercism.io/languages/ruby).
|
||
|
|
|
||
|
|
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.
|
||
|
|
|
||
|
|
Run the tests from the exercise directory using the following command:
|
||
|
|
|
||
|
|
ruby phone_number_test.rb
|
||
|
|
|
||
|
|
To include color from the command line:
|
||
|
|
|
||
|
|
ruby -r minitest/pride phone_number_test.rb
|
||
|
|
|
||
|
|
|
||
|
|
## Source
|
||
|
|
|
||
|
|
Event Manager by JumpstartLab [http://tutorials.jumpstartlab.com/projects/eventmanager.html](http://tutorials.jumpstartlab.com/projects/eventmanager.html)
|
||
|
|
|
||
|
|
## Submitting Incomplete Solutions
|
||
|
|
It's possible to submit an incomplete solution so you can see how others have completed the exercise.
|