sample distribution
sample(Object array, Integer size, Boolean replace)
The sample function uniformly sample the subset of a given size from an array of the elements either with or without the replacement.
Parameters
- Object array - 1d-array to be sampled.
- Integer size - the number of elements to choose.
- Boolean replace - (optional) If replace is true, the same element can be sampled multiple times, if false (as default), it can only appear once in the result.