Miscellaneous (Morphia)

java.lang.Object
- dev.morphia.aggregation.experimental.expressions.Miscellaneous

```
public final class Miscellaneous
extends Object
```
Defines miscellaneous operators for aggregations.

Since:

2.2

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static Expression`	`rand()`	Returns a random float between 0 and 1.
`static Filter`	`sampleRate(double rate)`	Matches a random selection of input documents.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - rand
```
public static Expression rand()
```
    Returns a random float between 0 and 1.
    
    Returns:
    
    the filter
    
    Since:
    
    2.2
    
    MongoDB documentation
    Aggregration Expression: $rand
  - sampleRate
```
public static Filter sampleRate(double rate)
```
    Matches a random selection of input documents. The number of documents selected approximates the sample rate expressed as a percentage of the total number of documents.
    
    Parameters:
    
    rate - the rate to check against
    
    Returns:
    
    the filter
    
    Since:
    
    2.2
    
    MongoDB documentation
    Aggregration Expression: $sampleRate