Sha256: b8bc06aa60c7fc113a40d22d2972cbd71ae6536163624b5fe6080b7878761400

Contents?: true

Size: 1.75 KB

Versions: 53

Compression:

Stored size: 1.75 KB

Contents

# 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
```
(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 formated 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.

## Running the tests

To run the tests, run the command `busted .` from within the exercise directory.

## Further information

For more detailed information about the Lua track, including how to get help if
you're having trouble, please visit the exercism.io [Lua language page](http://exercism.io/languages/lua/about).

## 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.

Version data entries

53 entries across 53 versions & 1 rubygems

Version Path
trackler-2.2.1.27 tracks/lua/exercises/phone-number/README.md
trackler-2.2.1.26 tracks/lua/exercises/phone-number/README.md
trackler-2.2.1.25 tracks/lua/exercises/phone-number/README.md
trackler-2.2.1.24 tracks/lua/exercises/phone-number/README.md
trackler-2.2.1.23 tracks/lua/exercises/phone-number/README.md
trackler-2.2.1.22 tracks/lua/exercises/phone-number/README.md
trackler-2.2.1.21 tracks/lua/exercises/phone-number/README.md
trackler-2.2.1.20 tracks/lua/exercises/phone-number/README.md
trackler-2.2.1.19 tracks/lua/exercises/phone-number/README.md
trackler-2.2.1.18 tracks/lua/exercises/phone-number/README.md
trackler-2.2.1.17 tracks/lua/exercises/phone-number/README.md
trackler-2.2.1.16 tracks/lua/exercises/phone-number/README.md
trackler-2.2.1.15 tracks/lua/exercises/phone-number/README.md
trackler-2.2.1.14 tracks/lua/exercises/phone-number/README.md
trackler-2.2.1.13 tracks/lua/exercises/phone-number/README.md
trackler-2.2.1.12 tracks/lua/exercises/phone-number/README.md
trackler-2.2.1.11 tracks/lua/exercises/phone-number/README.md
trackler-2.2.1.10 tracks/lua/exercises/phone-number/README.md
trackler-2.2.1.9 tracks/lua/exercises/phone-number/README.md
trackler-2.2.1.8 tracks/lua/exercises/phone-number/README.md