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2023-09-05 12:08:55 +02:00
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---
hide_title: true
hide_table_of_contents: true
title: Array Map
---
<##head##>
# Array Map
This node takes an input array, runs a small map script on each item, and outputs the resulting mapped array. That is an array with new objects, each created in the mapping script.
<div className="ndl-image-with-background l">
![](/nodes/data/array/array-map/array-map.png)
</div>
<##head##>
## Inputs
| Data | Description |
| --------------------------------------- | ------------------------------------------------------------ |
| <span className="ndl-data">Items</span> | <##input:items##>The array that should be mapped.<##input##> |
### Script
The mapping script used to map the objects in the input array to new objects in the mapped output array. The script should be provided in the following format:
```javascript
map({
FullName: () => object.first_name + object.last_name,
Age: 'years_old',
})
```
You can either provide a string with the name of the property that should be mapped with the syntax _to:'from'_ which will simply rename a property taking the value directly from the input object. Or you can provide a mapping function that takes the object (of the type [Noodl.Object](/javascript/reference/object)) and the function should return the mapped value.
Sometimes you need to extract the **Id** of the objects you are mapping, this can be done in the following way:
```javascript
map({
Value: () => object.getId(),
Label: 'PhotoName',
})
```
Note that the objects that are created when mapping are new objects so they will have their own Id as well.
## Outputs
### General
| Data | Description |
| --------------------------------------- | ---------------------------------------------------------------------------------------------------------------- |
| <span className="ndl-data">Items</span> | <##output:items##>The mapped array.<##output##> |
| <span className="ndl-data">Count</span> | <##output:count##>The number of items in the mapped array (this will be the same as the input array)<##output##> |
| Signal | Description |
| ------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| <span className="ndl-signal">Changed</span> | <##output:changed##>A signal is emitted here when the input array has been modified which will trigger the _Array Map_ node to remap the input and produce a new output _Items_.<##output##> |