Array append

Description

Appends an element to an array in place and returns the updated array. Has execution pins (not pure).

When to use

Use Array append when you need to build up an array element by element — for example, collecting results inside a loop. Wire an existing array (from a local variable or a previous node) into the Array input and the new value into Element. The node mutates the array in place and outputs the updated reference.

Pins

Input pins

Pin	Type	Default	Notes
Array	generic[]	—	The array to append to. The element type resolves at design-time from the connected source.
Element	generic	—	The element to append. Must match the array's element type.

Output pins

Pin	Type	Notes
Array	generic[]	The same array after the element has been appended.

Execution pins

Pin	Direction
In	Input
Out	Output

Example

Inside a For each loop, append each processed item to an accumulator array stored in a local variable. Wire the local variable read into Array, the loop body’s transformed value into Element, then wire the output Array back into a local variable set to persist the change for the next iteration.