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Iterator: Filter

Run a predicate sub-graph once per element of an input list and keep only the elements whose collected boolean is true. Mirrors JavaScript's Array.prototype.filter.

The auto-created Iterator::Collect expects a Bool on its collect connector (shown as "Keep element (boolean)" in the editor) to decide whether the current element survives.

Example
Input:  [1, 2, 3, 4, 5]
Body:   el → el % 2 === 0
Output: [2, 4]

Parameters​

This function has no parameters.

Input​

Arrayrequired

List to iterate over (Array or JSON array).

Value

Optional value injected into every iteration as value on the entry node.

Output​

Array

List of the elements whose predicate returned true, in original order.