Cassidy Interview QOTW: 9/15

cassidoo_9-15.js

// You are given an array of arrays, where each inner array represents 
// the runs scored by each team in an inning of a baseball game: 
// [[home1, away1], [home2, away2], ...]. Write a function that returns 
// an object with the total runs for each team, which innings each team 
// led, and who won the game.

function analyzeBaseballGame(innings) {
  let homeTotal = 0;
  let awayTotal = 0;
  const homeLedInnings = [];
  const awayLedInnings = [];

  innings.reduce((runningScores, currentInningRuns, index) => {
    const [homeInningRuns, awayInningRuns] = currentInningRuns;

    const currentHomeScore = runningScores.home + homeInningRuns;
    const currentAwayScore = runningScores.away + awayInningRuns;

    const inningNumber = index + 1;

    if (currentHomeScore > currentAwayScore) {
      homeLedInnings.push(inningNumber);
    } else if (currentAwayScore > currentHomeScore) {
      awayLedInnings.push(inningNumber);
    }

    return { home: currentHomeScore, away: currentAwayScore };
  }, { home: 0, away: 0 });

  homeTotal = innings.reduce((sum, inning) => sum + inning[0], 0);
  awayTotal = innings.reduce((sum, inning) => sum + inning[1], 0);

  let winner;
  if (homeTotal > awayTotal) {
    winner = "home";
  } else if (awayTotal > homeTotal) {
    winner = "away";
  } else {
    winner = "tie";
  }

  return {
    homeTotal,
    awayTotal,
    homeLedInnings,
    awayLedInnings,
    winner,
  };
}