Structures not returning as objects

[gtrcoi]

When I run code to search for structures through Game and Rooms I'm not able to access their methods as I would expect.

To use your tower script as an example:

var towers = _.filter(Game.structures, (t) => t.structureType == STRUCTURE_TOWER);
console.log(towers) // array of objects as expected
console.log(towers[0]) // an object as expected
for (const tower in towers) {
console.log(tower); // Returns "0". What is this data type? It should be the object but isn't?
var target = tower.pos.findClosestByRange(FIND_HOSTILE_CREEPS);
// if one is found...
if (target != undefined) {
// ...FIRE!
tower.attack(target);
}
}

tower.pos and tower.attack both return as undefined.

You can view my screeps repository for another example in the StructureManager.js script.

[gtrcoi]

I'm guessing there has been some change to how javascript handles for loops. It appears the variable tower above was pointing to the index.

The code below fixes this issue:

 var towers = _.filter(Game.structures, (t) => t.structureType == STRUCTURE_TOWER);
    // console.log(towers)
    // console.log(towers[0]);
    for (const key in towers) {
        let tower = towers[key];
        console.log(tower);
        var target = tower.pos.findClosestByRange(FIND_HOSTILE_CREEPS);
        // if one is found...
        if (target != undefined) {
            // ...FIRE!
            tower.attack(target);
        }
    }

Closing issue for now, although I do not know why the projects code has stopped working.