// . O 〇 o #=# <- space station // → ← → ← // // mass 1 5 7 3 // direction 1 -1 1 +1 // // answer: 1 // . o O 〇 #=# // → → → ← // // mass 1 3 5 7 // direction 1 1 1 -1 // // answer: 0 // O . o #=# // → → ← // // mass 5 1 4 // direction 1 1 -1 // // answer: 1 // . O o #=# // → → ← // // mass 1 5 4 // direction 1 1 -1 // // answer: 2 function Asteroid(mass, direction) { this.mass = mass; this.direction = direction; } function countHits(asteroids) { return 0; // TODO } var case1 = [ new Asteroid(1, 1), new Asteroid(5, -1), new Asteroid(7, 1), new Asteroid(3, -1), ]; var case2 = [ new Asteroid(1, 1), new Asteroid(3, 1), new Asteroid(5, 1), new Asteroid(7, -1), ]; var case3 = [ new Asteroid(5, 1), new Asteroid(1, 1), new Asteroid(4, -1), ]; var case4 = [ new Asteroid(1, 1), new Asteroid(5, 1), new Asteroid(4, -1), ]; function testCase(caseNum, asteroids, expected) { var actual = countHits(asteroids); var output = 'Case ' + caseNum + ': '; if (actual == expected) { output += 'PASSED'; } else { output += 'FAILED; got ' + actual + ' expected ' + expected; } console.log(output); } testCase(1, case1, 1); testCase(2, case2, 0); testCase(3, case3, 1); testCase(4, case4, 2);