# ARRAYCROSS Function

Generates a nested array containing the cross-product of all elements in two or more arrays.

Input arrays can be referenced as column names or array literals.

If Array1 has M elements and Array2 has N elements, the generated array has M X N elements.

**Note**

Be careful applying this function across columns of large arrays. A limit is automatically applied on large arrays to prevent overloading the browser. Avoid apply the `ARRAYCROSS`

transform to very wide columns.

**Wrangle vs. SQL:** This function is part of Wrangle, a proprietary data transformation language. Wrangle is not SQL. For more information, see Wrangle Language.

## Basic Usage

**Array literal reference example:**

arraycross[["A","B"],["1","2","3"]])

** Output:** Returns a single array:

[["A","1"],["A","2"],["A","3"],["B","1"],["B","2"],["B","3"]]

**Column reference example:**

arraycross(array1,array2,array3)

**Output:** Returns an array containing a single array listing all combinations of elements between `array1`

, `array2`

, and `array3`

.

## Syntax and Arguments

arraycross(array_ref1,array_ref2)

Argument | Required? | Data Type | Description |
---|---|---|---|

array_ref1 | Y | string or array | Name of first column or first array literal to apply to the function |

array_ref2 | Y | string or array | Name of second column or second array literal to apply to the function |

For more information on syntax standards, see Language Documentation Syntax Notes.

### array_ref1, array_ref2

Array literal or name of the array column whose intersection you want to derive.

** Usage Notes:**

Required? | Data Type | Example Value |
---|---|---|

Yes | Array literal or column reference | |

## Examples

**Astuce**

For additional examples, see Common Tasks.

### Example - Simple cross example

This example illustrates how to use the nested functions.

**Functions**:

Item | Description |
---|---|

ARRAYCONCAT Function | Combines the elements of one array with another, listing all elements of the first array before listing all elements of the second array. |

ARRAYINTERSECT Function | Generates an array containing all elements that appear in multiple input arrays, referenced as column names or array literals. |

ARRAYCROSS Function | Generates a nested array containing the cross-product of all elements in two or more arrays. |

ARRAYUNIQUE Function | Generates an array of all unique elements among one or more arrays. |

**Source:**

Code formatting has been applied to improve legibility.

Item | ArrayA | ArrayB |
---|---|---|

Item1 | ["A","B","C"] | ["1","2","3"] |

Item2 | ["A","B"] | ["A","B","C"] |

Item3 | ["D","E","F"] | ["4","5","6"] |

**Transformation:**

You can apply the following transforms in the following order. Note that the column names must be different from the transform name, which is a reserved word.

Transformation Name | |
---|---|

Parameter: Formula type | Single row formula |

Parameter: Formula | ARRAYCONCAT([Letters,Numerals]) |

Parameter: New column name | 'concat2' |

Transformation Name | |
---|---|

Parameter: Formula type | Single row formula |

Parameter: Formula | ARRAYINTERSECT([Letters,Numerals]) |

Parameter: New column name | 'intersection2' |

Transformation Name | |
---|---|

Parameter: Formula type | Single row formula |

Parameter: Formula | ARRAYCROSS([Letters,Numerals]) |

Parameter: New column name | 'cross2' |

Transformation Name | |
---|---|

Parameter: Formula type | Single row formula |

Parameter: Formula | ARRAYUNIQUE([Letters,Numerals]) |

Parameter: New column name | 'unique2' |

**Results:**

For display purposes, the results table has been broken down into three separate sets of columns.

Column set 1:

Item | ArrayA | ArrayB | concat2 | intersection2 |
---|---|---|---|---|

Item1 | | ["1","2","3"] | ["A","B","C","1","2","3"] | |

Item2 | ["A","B"] | ["A","B","C"] | ["A","B","A","B","C"] | ["A","B"] |

Item3 | ["D","E","F"] | ["4","5","6"] | ["D","E","F","4","5","6"] | [ ] |

Column set 2:

Item | cross2 |
---|---|

Item1 | [["A","1"],["A","2"],["A","3"],["B","1"],["B","2"],["B","3"],["C","1"],["C","2"],["C","3"]] |

Item2 | [["A","A"],["A","B"],["A","C"],["B","A"],["B","B"],["B","C"]] |

Item3 | [["D","4"],["D","5"],["D","6"],["E","4"],["E","5"],["E","6"], ["F","4"],["F","5"],["F","6"]] |

Column set 3:

Item | unique2 |
---|---|

Item1 | ["A","B","C","1","2","3"] |

Item2 | ["A","B","C"] |

Item3 | ["D","E","F","4","5","6"] |