Internal array to store food and tools

[mrfatguy]

Please, implement and internal arrays that will hold IDs of user possessions in the Food Inventory and Tools Inventory.

For Food Inventory it is suggested to use 4 x 28 array. Example:

let food = [
    [28, 29, 29, null, null, null, null, 4, 3, 10],
    [1, null, null, 1, 2, 3, 9, 5, 6, 4],
    [31, 4, 9, null, 31, 9, 8, 4, 7, 6],
    [29, 29, 29, 29, 29, 29, 29, 29, 29, 29]
];

But, these are non-mandatory suggestions to consider only. Details: here.

When starting a new game the entire array should have all items' initial values set to null.

For the reasons explained here, for Tools Inventory it is suggested to use 4 x 28 array as well, but such that will hold quantity as well. Example:

let tools = [
    [[19, 1], [21, 1], [22, 1], null, null, null, null, null, null, null],
    [null, null, null, null, null, null, null, null, null, null],
    [[24, 1], [23, 1], [27, 1], [12, 1], [14, 1], null, null, null, null, null],
    [[25, 1], [26, 50], [26, 50], [26, 50], [26, 50], [26, 11], [16, 1], [17, 1], [21, 1], [13, 1]]
];

But, these are non-mandatory suggestions to consider only. Details: here.

When starting a new game the entire array should also have all items' initial values set to null.