(WIP) https://twitter.com/quephird/status/928812154307973122

emojiGraph.js

function makeGraphBase(width, height) {
    return Array(height).fill(undefined).map(row => Array(width).fill('⬜'));
};

function makeData() {
    return [0, 1, 2, 4, 4, 3];
};

function diff(val, index, array) {
    return array[index + 1] - val;
};

/** Return an array with one fewer elements */
function getSlopes(data) {
    return data.map(diff).filter(val => !isNaN(val));
};

function normalizeSlopes(slopes) {
    return slopes.map((slope) => {
        if (slope > 0) {
            return 1
        } else if (slope < 0) {
            return -1
        } else {
            return 0
        };
    });
};

function cleanupSlopes(slopes) {
    const noZeroes = slopes.filter(val => val !== 0);
    const bigSlopes = noZeroes.map(diff)

};

console.log('hey ⬜📈📉');
console.log(makeGraphBase(10, 5));
console.log(makeData());
console.log(getSlopes(makeData()));
console.log(normalizeSlopes(getSlopes(makeData())));