====== Calc Lookup Table Difference ======

===== Description =====

Calculates the difference between two lookup tables.

===== Inputs =====

^ Name  ^ Type  ^ Description  ^
| First Table  | [[Lookup Table Type]]  | The first lookup table.  |
| Second Table  | [[Lookup Table Type]]  | The second lookup table.  |

===== Optional Inputs =====

^ Name  ^ Type  ^ Description  ^ Default Value  ^
| Use Symmetrical Difference  | [[Boolean Value Type]]  | If true, the symmetrical difference between First Table and Second Table is calculated, keeping the keys present in only one of the two tables; if false, the relative complement is calculated instead, keeping only the keys of First Table that do not occur in Second Table.  | False  |

===== Outputs =====

^ Name  ^ Type  ^ Description  ^
| Result  | [[Lookup Table Type]]  | The resulting lookup table.  |

===== Group =====

[[Functor List#Lookup Table | Lookup Table]]

===== Notes =====

The key and value column names of Result are inherited from First Table.

For background on the two set operations this functor can compute, see [[https://en.wikipedia.org/wiki/Complement_(set_theory)#Relative_complement|relative complement]] and [[https://en.wikipedia.org/wiki/Symmetric_difference|symmetric difference]].

===== Internal Name =====

CalcLookupTableDifference