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Commit 3f1de98

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programmiri
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Add excercise and solution for RNA Transcription
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‎rna-transcription/.eslintrc‎

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{
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"root": true,
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"parser": "babel-eslint",
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"parserOptions": {
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"ecmaVersion": 7,
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"sourceType": "module"
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},
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"env": {
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"es6": true,
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"node": true,
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"jest": true
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},
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"extends": [
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"eslint:recommended",
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"plugin:import/errors",
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"plugin:import/warnings"
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],
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"rules": {
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"linebreak-style": "off",
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"import/extensions": "off",
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"import/no-default-export": "off",
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"import/no-unresolved": "off",
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"import/prefer-default-export": "off"
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}
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}

‎rna-transcription/README.md‎

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# RNA Transcription
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Given a DNA strand, return its RNA complement (per RNA transcription).
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Both DNA and RNA strands are a sequence of nucleotides.
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The four nucleotides found in DNA are adenine (**A**), cytosine (**C**),
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guanine (**G**) and thymine (**T**).
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The four nucleotides found in RNA are adenine (**A**), cytosine (**C**),
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guanine (**G**) and uracil (**U**).
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Given a DNA strand, its transcribed RNA strand is formed by replacing
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each nucleotide with its complement:
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* `G` -> `C`
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* `C` -> `G`
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* `T` -> `A`
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* `A` -> `U`
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## Setup
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Go through the setup instructions for Javascript to install the necessary
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dependencies:
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[https://exercism.io/tracks/javascript/installation](https://exercism.io/tracks/javascript/installation)
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## Requirements
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Install assignment dependencies:
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```bash
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$ npm install
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```
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## Making the test suite pass
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Execute the tests with:
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```bash
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$ npm test
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```
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In the test suites all tests but the first have been skipped.
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Once you get a test passing, you can enable the next one by changing `xtest` to
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`test`.
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## Source
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Hyperphysics [http://hyperphysics.phy-astr.gsu.edu/hbase/Organic/transcription.html](http://hyperphysics.phy-astr.gsu.edu/hbase/Organic/transcription.html)
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## Submitting Incomplete Solutions
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It's possible to submit an incomplete solution so you can see how others have
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completed the exercise.

‎rna-transcription/babel.config.js‎

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module.exports = {
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presets: [
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[
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'@babel/env',
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{
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targets: {
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node: 'current',
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},
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useBuiltIns: false,
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},
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],
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],
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};

‎rna-transcription/package.json‎

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{
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"name": "exercism-javascript",
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"version": "0.0.0",
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"description": "Exercism exercises in Javascript.",
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"author": "Katrina Owen",
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"private": true,
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"repository": {
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"type": "git",
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"url": "https://github.com/exercism/javascript"
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},
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"devDependencies": {
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"@babel/cli": "^7.2.3",
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"@babel/core": "^7.4.0",
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"@babel/preset-env": "^7.4.2",
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"@types/jest": "^24.0.13",
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"@types/node": "^12.0.4",
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"babel-eslint": "^10.0.1",
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"babel-jest": "^24.5.0",
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"eslint": "^5.15.3",
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"eslint-plugin-import": "^2.16.0",
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"jest": "^24.5.0"
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},
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"jest": {
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"modulePathIgnorePatterns": [
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"package.json"
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]
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},
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"scripts": {
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"test": "jest --no-cache ./*",
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"watch": "jest --no-cache --watch ./*",
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"lint": "eslint .",
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"lint-test": "eslint . && jest --no-cache ./* "
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},
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"license": "MIT",
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"dependencies": {}
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}
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//
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// This is only a SKELETON file for the 'RNA Transcription' exercise. It's been provided as a
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// convenience to get you started writing code faster.
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//
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const translationMap = {
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G: 'C',
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C: 'G',
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T: 'A',
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A: 'U',
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};
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export const toRna = (string) => {
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return string
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.split('')
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.map((char) => translationMap[char] || char)
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.join('');
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};
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import { toRna } from './rna-transcription';
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describe('Transcription', () => {
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test('empty rna sequence', () => {
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expect(toRna('')).toEqual('');
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});
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test('transcribes cytosine to guanine', () => {
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expect(toRna('C')).toEqual('G');
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});
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test('transcribes guanine to cytosine', () => {
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expect(toRna('G')).toEqual('C');
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});
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test('transcribes thymine to adenine', () => {
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expect(toRna('T')).toEqual('A');
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});
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test('transcribes adenine to uracil', () => {
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expect(toRna('A')).toEqual('U');
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});
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test('transcribes all dna nucleotides to their rna complements', () => {
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expect(toRna('ACGTGGTCTTAA')).toEqual('UGCACCAGAAUU');
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});
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});

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