Function func

Create a Dataset that produces each element by calling a provided function.

Note that repeated iterations over this Dataset may produce different results, because the function will be called anew for each element of each iteration.

Also, beware that the sequence of calls to this function may be out of order in time with respect to the logical order of the Dataset. This is due to the asynchronous lazy nature of stream processing, and depends on downstream transformations (e.g. .shuffle()). If the provided function is pure, this is no problem, but if it is a closure over a mutable state (e.g., a traversal pointer), then the order of the produced elements may be scrambled.

let i = -1;
const func = () =>
   ++i < 5 ? {value: i, done: false} : {value: null, done: true};
const ds = tf.data.func(func);
await ds.forEachAsync(e => console.log(e));
Copy