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Map

Creates a new list with the results the provided function called for every item of the list.

Description​

The Map brick creates a new list which items are the result values of the provided function (mapper) execution on every item of the original provided list.

In other words, Map transforms each element of a list and is equivalent to Javascript's <a href="https://medium.com/@JeffLombardJr/understanding-foreach-map-filter-and-find-in-javascript-f91da93b9f2c" target="_blank">map()</a>

The output control flow is triggered when all items have been processed.

Example:​

  • inputs:

    1. list: [1, 4, 9, 16]
    2. mapper: (x) =&gt; x * 2

  • outputs:

    1. resulting list: [2, 8, 18, 32]

Inputs​

  • Control Flow (Control Flow)
  • list (List): The original list to iterate on.
  • mapper (Mapper): The function to execute on every item of the list, providing the item of the new list.
    Inputs:
    - start (Control Flow): Triggered when the item is to be processed.
    - item (Object): The current item of the list.
    - rank (Number): The rank of the current item.
    - list (List): The full list being iterated.

    Outputs:
    - end (Control Flow): Triggered when the processing is completed.
    - output item (Object): The transformed item to be placed in returning list.

Outputs​

  • Control Flow (Control Flow)
  • resulting list (List): The generated list with items resulting of the mapper function.