# Concatenate JSON arrays[¶](https://doc.dataiku.com/dss/latest/preparation/processors/arrays-concat.html#concatenate-json-arrays "Permalink to this headline")

This processor concatenates N input columns containing arrays (as JSON) into a single JSON array.

## Example[¶](https://doc.dataiku.com/dss/latest/preparation/processors/arrays-concat.html#example "Permalink to this headline")

* Input:

§ a       b

§ [1,2]   ["x","y"]

* Output:

§ [1, 2, "x", "y"]
