calculate.ts

calculate.ts

export const calculateAverageScore = (getContent: () => Promise<string>) =>
    getContent().then((result) => {
        const lines = result.split("\n")
            .map((l) => l.split(","))
            .filter((_, i) => i !== 0);
        const scores = lines.map((l) => Number(l[3]));
        return scores.reduce((a, c) => a + c) / scores.length;
    });

parseStuff.ts

import { calculateAverageScore } from './calculate.ts'

const getContentFromInternet = () =>
    fetch(
        "https://raw.githubusercontent.com/minnacaptain/have-you-tried-deno-yet/master/example_data.txt",
    ).then((t) => t.text());

console.log(
    "Average score: " + await calculateAverageScore(getContentFromInternet),
);