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We are working towards making exercises stand-alone. That is to say: no more generating READMEs on the fly. This will give maintainers more control over each individual exercise README, and it will also make some of the backend logic for delivering exercises simpler. The README template uses the Go text/template package, and the default templates generate the same READMEs as we have been generating on the fly. See the documentation in [regenerating exercise readmes][regenerate-docs] for details. The READMEs can be generated at any time using a new 'generate' command in configlet. This command has not yet landed in master or been released, but can be built from source in the generate-readmes branch on [configlet][]. [configlet]: https://github.com/exercism/configlet [regenerate-docs]: https://github.com/exercism/docs/blob/master/maintaining-a-track/regenerating-exercise-readmes.md
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Nucleotide Count
Given a DNA string, compute how many times each nucleotide occurs in the string.
DNA is represented by an alphabet of the following symbols: 'A', 'C', 'G', and 'T'.
Each symbol represents a nucleotide, which is a fancy name for the particular molecules that happen to make up a large part of DNA.
Shortest intro to biochemistry EVAR:
- twigs are to birds nests as
- nucleotides are to DNA and RNA as
- amino acids are to proteins as
- sugar is to starch as
- oh crap lipids
I'm not going to talk about lipids because they're crazy complex.
So back to nucleotides.
DNA contains four types of them: adenine (A), cytosine (C), guanine
(G), and thymine (T).
RNA contains a slightly different set of nucleotides, but we don't care about that for now.
Elm Installation
Refer to the Exercism help page 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.
$ npm install
Execute the tests with:
$ npm test
Automatically run tests again when you save changes:
$ 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
The Calculating DNA Nucleotides_problem at Rosalind http://rosalind.info/problems/dna/
Submitting Incomplete Solutions
It's possible to submit an incomplete solution so you can see how others have completed the exercise.