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Analyzing DNA

A Learning TypeScript > Arrays 🥗 appetizer project.

Hello! You're a research biologist at the Strongly Typed Institute of Biochemistry. We've got a great task for you today: analyzing sequences of DNA to find mutations!

Don't worry, you won't have to draw on your vast experience of biochemical studies. We reduced the DNA information to arrays of single-character strings. Your task is to write TypeScript functions that take in DNA and return the differences. We'll walk you through each of the functions you need to write.

Setup

If you haven't yet, set up the github.com/LearningTypeScript/projects repository locally.

shell
git clone https://github.com/LearningTypeScript/projects learning-typescript-projects
cd learning-typescript-projects
npm i
shell
git clone https://github.com/LearningTypeScript/projects learning-typescript-projects
cd learning-typescript-projects
npm i

Change your terminal directory to this project's:

shell
cd projects/arrays/analyzing-dna
shell
cd projects/arrays/analyzing-dna

In one terminal, run the TypeScript compiler via the tsc script within whichever step you're working on. For example, to start the TypeScript compiler on the first step in watch mode:

shell
npm run tsc -- --project 01-shallow-equality --watch
shell
npm run tsc -- --project 01-shallow-equality --watch

In another terminal, run Jest via the test script on whichever step you're working on. For example, to start tests for the first step in watch mode:

shell
npm run test -- 1 --watch
shell
npm run test -- 1 --watch

Steps

Notes

  • Please solve these with for loops, not fancy .map/.reduce shenanigans or with npm libraries.
    • For bonus points, you can try making versions of all the steps that only use array methods instead of for loops!
  • Don't import code from one step into another.