VariableExpressions (Morphia)

java.lang.Object
- dev.morphia.aggregation.expressions.VariableExpressions

```
public final class VariableExpressions
extends Object
```
Defines helper methods for the variable expressions

Since:

2.0

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static dev.morphia.aggregation.expressions.impls.LetExpression`	`let(dev.morphia.aggregation.expressions.impls.Expression in)`	Binds variables for use in the specified expression, and returns the result of the expression.

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

- Method Detail
  - let
```
public static dev.morphia.aggregation.expressions.impls.LetExpression let(dev.morphia.aggregation.expressions.impls.Expression in)
```
    Binds variables for use in the specified expression, and returns the result of the expression.
    
    Parameters:
    
    in - the expression to evaluate. variables can be defined using the LetExpression.variable(String, Expression) method
    
    Returns:
    
    the new expression
    
    MongoDB documentation
    Aggregration Expression: $let