neighbors.js

var arr = [
    'James Harden, PG',
    'Anthony Davis, PF',
    'LeBron James, SF',
    'Damian Lillard, PG',
    'Giannis Antetokounmpo, PF',
    'Kevin Durant, SF',
    'Russell Westbrook, PG',
    'Kyrie Irving, PG',
    'LaMarcus Aldridge, C',
    'Victor Oladipo, SG',
    'DeMar DeRozan, SG',
    'Joel Embiid, C',
    'Bradley Beal, SG',
    'Lou Williams, SG',
    'Jimmy Butler, SG',
    'Kemba Walker, PG',
    'Paul George, SF',
    'Blake Griffin, PF',
    'CJ McCollum, SG',
    'Karl-Anthony Towns, C',
]

var targets = [
    'James Harden, PG',
    'Kevin Durant, SF',
    'Karl-Anthony Towns, C',
    'Anthony Davis, PF',
]

const neighbor = (degree, idx, arr) => {
    return [
        arr[idx - degree],
        arr[idx + degree]
    ]
}

for (var i = 0; i < arr.length; i++) {
    for (var k = 0; k < targets.length; k++) {
        var target = targets[k]
        if (arr[i] === target) {
            degree = 0
            console.log(degree, '->', (arr[i]));

            degree = 2
            console.log(degree, '->', (neighbor(degree, i, arr)[0]));
            console.log(degree, '->', (neighbor(degree, i, arr)[1]));

            degree = 1
            console.log(degree, '->', (neighbor(degree, i, arr)[0]));
            console.log(degree, '->', (neighbor(degree, i, arr)[1]));

            console.log('\n');
        }
    }
}