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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 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/groovy).

Run the tests by executing the test script.

```
$ groovy ./PhoneNumberSpec.groovy
```

After the first test(s) pass, continue by commenting out or removing the `@Ignore` annotations prepending other tests.

When all tests pass, congratulations!

## 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

71 entries across 71 versions & 1 rubygems

Version Path
trackler-2.2.1.180 tracks/groovy/exercises/phone-number/README.md
trackler-2.2.1.179 tracks/groovy/exercises/phone-number/README.md
trackler-2.2.1.178 tracks/groovy/exercises/phone-number/README.md
trackler-2.2.1.177 tracks/groovy/exercises/phone-number/README.md
trackler-2.2.1.176 tracks/groovy/exercises/phone-number/README.md
trackler-2.2.1.175 tracks/groovy/exercises/phone-number/README.md
trackler-2.2.1.174 tracks/groovy/exercises/phone-number/README.md
trackler-2.2.1.173 tracks/groovy/exercises/phone-number/README.md
trackler-2.2.1.172 tracks/groovy/exercises/phone-number/README.md
trackler-2.2.1.171 tracks/groovy/exercises/phone-number/README.md
trackler-2.2.1.170 tracks/groovy/exercises/phone-number/README.md
trackler-2.2.1.169 tracks/groovy/exercises/phone-number/README.md
trackler-2.2.1.167 tracks/groovy/exercises/phone-number/README.md
trackler-2.2.1.166 tracks/groovy/exercises/phone-number/README.md
trackler-2.2.1.165 tracks/groovy/exercises/phone-number/README.md
trackler-2.2.1.164 tracks/groovy/exercises/phone-number/README.md
trackler-2.2.1.163 tracks/groovy/exercises/phone-number/README.md
trackler-2.2.1.162 tracks/groovy/exercises/phone-number/README.md
trackler-2.2.1.161 tracks/groovy/exercises/phone-number/README.md
trackler-2.2.1.160 tracks/groovy/exercises/phone-number/README.md