- Reference >
- Operators >
- Aggregation Pipeline Operators >
- Array Aggregation Operators
Array Aggregation Operators¶
Note
For details on specific operator, including syntax and examples, click on the specific operator to go to its reference page.
Name | Description |
---|---|
$arrayElemAt |
Returns the element at the specified array index. |
$concatArrays |
Concatenates arrays to return the concatenated array. |
$filter |
Selects a subset of the array to return an array with only the elements that match the filter condition. |
$isArray |
Determines if the operand is an array. Returns a boolean. |
$size |
Returns the number of elements in the array. Accepts a single expression as argument. |
$slice |
Returns a subset of an array. |