Map List
Uncontrolled node
Overview
The Map List node applies a transformation pattern to each item in a list and returns a new list with the transformed values.
This is useful for formatting data, applying logic across a collection of values, or modifying structure—without writing full code blocks.
Inputs
| Input | Type | Description | Default |
|---|---|---|---|
| List | List | A list of items (e.g., text, number, boolean, dictionary) to transform | - |
Outputs
| Output | Type | Description |
|---|---|---|
| Output | List | A new list of transformed values based on the pattern |
Panel Controls
The right-side panel includes a Pattern field, where you can define a Python-style transformation for each list item using the variable value.
Example
If your list is:
"hello", "world"
and the pattern is: value[:3]
The output will be:
"hel","wor"
Example: Mapping into Dictionaries with Index
You can return a dictionary from each list item using both value and index.
Pattern:
{"a": value, "b": index}
If your list is:
"apple", "banana"
Then the output will be:
[{"a": "apple", "b": 0}, {"a": "banana", "b": 1}]
You can then use the Get Value node with a path input like:
0.a
To retrieve "apple" from the first mapped object, or:
1.b
To retrieve 1 (the index of "banana").
The value keyword refers to the current item in the list. You can use Python syntax like value.upper(), len(value), value["key"], etc.
Use value to access the item, and index to reference its position in the list. Combined with the Get Value node, this enables precise referencing and extraction from mapped lists.