shuffled | Python random permutations of large integer ranges | Hashing library

Good effort in pasting the whole dataset creation procedure, is what it needs to be included in order to make the example reproducible.

Let's start first with, how to join several tables: you have your posts table which contains the user_id and we can use it to join with users with the following.

Here's how I would do it.

Generate a set of 15 indices such that none of the indices are adjacent.
In your final list, add 1 if the index is present in the set, otherwise add 2.

Here's what I said in code:

When something like this happens, it's usually due to bad ordering of initialization.

The initialization of the Player class goes this way:

1. the name property has its backing field initialized with the _name value
2. the init block is run, and tries to access name
3. the getter of name tries to read the hometown property, but fails because hometown is still not initialized
4. ...if things had gone right, the hometown property would be initialized now with the lazy delegate

So basically you're trying to access hometown before the lazy delegate is configured. If you move hometown's declaration above the init block, you should be fine.

You can see the fix in action on the playground

I found the problem. It wasn't anything to do with the shuffling algorithm, nor with StellarGraph's implementation. The problem was in the demo, at the following lines:

The update method is a method of the DocumentReference class. So you have to call it on snap.ref as follows:

You need to:

Instead of initializing currentIndex as -1, you could initialize it as a random index:

That's because holding all elements of your dataset in the buffer is expensive. Unless you absolutely need perfect randomness, you should use a smaller buffer_size. All elements will eventually be taken, but in a more deterministic manner.

This is what's going to happen with a smaller buffer_size, say 3. The buffer is the brackets, and Tensorflow samples a random value in this bracket. The one randomly picked is ^

Since the shuffle functions shuffle the arrays indexes, you can just shuffle the array the same way you did but add name strings in the array.