cassidyChallenge.js

# Cassidoo Newsletter Challenge - 2/21/19
removeForOdd = (arr) => {
    const sum = arr.reduce((a, b) => a + b);
    if (sum % 2 !== 0) {
        return -1;
    }
    return arr.findIndex(x => x % 2 !== 0);
}


# Same thing in a line. Coz, why not?
removeForOdd = arr => arr.reduce((a, b) => a + b) % 2 !== 0 ? -1 : arr.findIndex(x => x % 2 !== 0);