elm/exercises/pascals-triangle/README.md
2017-10-07 14:38:24 -04:00

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# Pascals Triangle
Compute Pascal's triangle up to a given number of rows.
In Pascal's Triangle each number is computed by adding the numbers to
the right and left of the current position in the previous row.
```text
1
1 1
1 2 1
1 3 3 1
1 4 6 4 1
# ... etc
```
## Elm Installation
Refer to the [Exercism help page](http://exercism.io/languages/elm) for Elm
installation and learning resources.
## Writing the Code
The first time you start an exercise, you'll need to ensure you have the
appropriate dependencies installed.
```bash
$ npm install
```
Execute the tests with:
```bash
$ npm test
```
Automatically run tests again when you save changes:
```bash
$ npm run watch
```
As you work your way through the test suite, be sure to remove the `skip <|`
calls from each test until you get them all passing!
## Source
Pascal's Triangle at Wolfram Math World [http://mathworld.wolfram.com/PascalsTriangle.html](http://mathworld.wolfram.com/PascalsTriangle.html)
## Submitting Incomplete Solutions
It's possible to submit an incomplete solution so you can see how others have completed the exercise.