72 lines
1.8 KiB
Markdown
72 lines
1.8 KiB
Markdown
# Nucleotide Count
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Given a DNA string, compute how many times each nucleotide occurs in the string.
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DNA is represented by an alphabet of the following symbols: 'A', 'C',
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'G', and 'T'.
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Each symbol represents a nucleotide, which is a fancy name for the
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particular molecules that happen to make up a large part of DNA.
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Shortest intro to biochemistry EVAR:
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- twigs are to birds nests as
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- nucleotides are to DNA and RNA as
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- amino acids are to proteins as
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- sugar is to starch as
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- oh crap lipids
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I'm not going to talk about lipids because they're crazy complex.
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So back to nucleotides.
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DNA contains four types of them: adenine (`A`), cytosine (`C`), guanine
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(`G`), and thymine (`T`).
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RNA contains a slightly different set of nucleotides, but we don't care
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about that for now.
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## Running tests
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Execute the tests with:
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```bash
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$ elixir bob_test.exs
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```
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(Replace `bob_test.exs` with the name of the test file.)
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### Pending tests
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In the test suites, all but the first test have been skipped.
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Once you get a test passing, you can unskip the next one by
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commenting out the relevant `@tag :pending` with a `#` symbol.
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For example:
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```elixir
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# @tag :pending
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test "shouting" do
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assert Bob.hey("WATCH OUT!") == "Whoa, chill out!"
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end
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```
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Or, you can enable all the tests by commenting out the
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`ExUnit.configure` line in the test suite.
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```elixir
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# ExUnit.configure exclude: :pending, trace: true
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```
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For more detailed information about the Elixir track, please
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see the [help page](http://exercism.io/languages/elixir).
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## Source
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The Calculating DNA Nucleotides_problem at Rosalind [http://rosalind.info/problems/dna/](http://rosalind.info/problems/dna/)
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## Submitting Incomplete Problems
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It's possible to submit an incomplete solution so you can see how others have completed the exercise.
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