Thank you, you were correct I was missing brackets which was causing some confusion.

For reference to someone in the future looking at this, I should have brackets after the return up till && as below:

{filter: function(object){ return (object.structureType === STRUCTURE_ROAD || object.structureType === STRUCTURE_CONTAINER) && (object.hits < object.hitsMax); }

Hi noob to the game but loving it so far!

Maybe a silly question but when ever I attempt to repair a container I get error code -7 (Invalid Target) are you not able to repair them or am I doing something stupid?

var repTarget = creep.room.find(FIND_STRUCTURES, {filter: function(object){ return object.structureType === STRUCTURE_ROAD || object.structureType === STRUCTURE_CONTAINER && (object.hits < object.hitsMax); } });

if (repTarget.length > 0)
{
if(creep.repair(repTarget[0]) == ERR_NOT_IN_RANGE)
{
creep.moveTo(repTarget[0]);
}
}