How to equally divide the elements of an array among other arrays?

Question

PHP

There is an initial array A - it contains 1500 unique numbers.

The task is to get 400 arrays containing 30 numbers from array A, so that each number from array A occurs the same number of times.

The code will be in php, but would I understand the scheme? Especially if the number of array elements can change.

Answer 1

In a loop, extract a random string from array A , and place it in the target array while deleting it from A
And so on until A becomes empty. If A becomes empty, then we restore its original state (1500 rows) and continue decomposing random rows into target arrays.
And so on in a circle until we fill all the target arrays.