Code

Robot Rumble ALPHA
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function robot(state, unit) {
  console.log("Bum bum bum buuuum!");
  enemies = state.objsByTeam(state.otherTeam)
  closestEnemy = _.minBy(enemies,
    e => e.coords.distanceTo(unit.coords) + e.health/10
  )
  direction = unit.coords.directionTo(closestEnemy.coords);

  if(unit.coords.distanceTo(closestEnemy.coords) < 3) {
    let closeGuys=0;
    for(let i=-2;i<3;i++){
      for(let j=-2;j<3;j++){
        let obj=state.objByCoords(new Coords(closestEnemy.coords.y+i,closestEnemy.coords.x+j));
        if(obj&&obj.team==unit.team){
          closeGuys++;
        } 
      }
    }
    if(closeGuys<2){
      return Action.move(direction.opposite);
    }
    if(unit.coords.distanceTo(closestEnemy.coords) === 1) {
      return Action.attack(direction);
    } else {
      return Action.move(direction);
    }
  }
  
  let to = unit.coords.directionTo(new Coords(10,10));
  let inward = state.objByCoords(new Coords(unit.coords.y+to.toCoords.y,unit.coords.x+to.toCoords.x));
  
  if(!state.objByCoords(new Coords(unit.coords.y+to.opposite.toCoords.y,unit.coords.x+to.opposite.toCoords.x))){
    return Action.move(unit.coords.directionTo(new Coords(10,10)).opposite);
  }

  if(!inward){
    return Action.attack(to);
  }
  console.log("do nothing");
  return null;
}