array_shift_left()
Applies to: ✅ Azure Data Explorer ✅ Azure Monitor ✅ Microsoft Sentinel
Shifts the values inside a dynamic array to the left.
Syntax
array_shift_left(array, shift_count [, default_value ])
Learn more about syntax conventions.
Parameters
| Name | Type | Required | Description |
|---|---|---|---|
| array | dynamic |
✔️ | The array to shift. |
| shift_count | int |
✔️ | The number of positions that array elements are shifted to the left. If the value is negative, the elements are shifted to the right. |
| default_value | scalar | The value used for an element that was shifted and removed. The default is null or an empty string depending on the type of elements in the array. |
Returns
Returns a dynamic array containing the same number of elements as in the original array. Each element has been shifted according to shift_count. New elements that are added in place of removed elements have a value of default_value.
Examples
Shifting to the left by two positions:
print arr=dynamic([1,2,3,4,5])
| extend arr_shift=array_shift_left(arr, 2)
Output
| arr | arr_shift |
|---|---|
| [1,2,3,4,5] | [3,4,5,null,null] |
Shifting to the left by two positions and adding default value:
print arr=dynamic([1,2,3,4,5])
| extend arr_shift=array_shift_left(arr, 2, -1)
Output
| arr | arr_shift |
|---|---|
| [1,2,3,4,5] | [3,4,5,-1,-1] |
Shifting to the right by two positions by using negative shift_count value:
print arr=dynamic([1,2,3,4,5])
| extend arr_shift=array_shift_left(arr, -2, -1)
Output
| arr | arr_shift |
|---|---|
| [1,2,3,4,5] | [-1,-1,1,2,3] |
Related content
- To shift an array to the right, use array_shift_right().
- To rotate an array to the right, use array_rotate_right().
- To rotate an array to the left, use array_rotate_left().