Discussion on: Daily Challenge #6 - Grandma and her friends

[Valerio Narcisi]

//TS
//TDD

enum Map {
    X1 = 100.0,
    X2 = 200.0,
    X3 = 250.0,
    X4 = 300.0,
}

const grannyFriends = [
    ['A1', 'X1'],
    ['A2', 'X2'],
    ['A3', 'X3'],
    ['A4', 'X4'],
];

export default (friends: string[]): number => {
    return friends
        .map(f => {
            for (const gf of grannyFriends) {
                if (gf.includes(f)) {
                    return Map[gf[1]];
                }
            }
            return 0;
        })
        .reduce((acc, curr) => (curr > 0 ? acc + (curr - acc) : acc), 0);
};

TEST

import grannyTrip from './help-your-granny';

describe('tdd granny trip', () => {
    test('should calculate distances', () => {
        expect(grannyTrip(['A1', 'A2', 'A3', 'A4', 'A5'])).toEqual(300);
        expect(grannyTrip(['A1', 'A2', 'A3'])).toEqual(250);
        expect(grannyTrip(['A1', 'A2', 'A4'])).toEqual(300);
    });
});