---
title: Sets
summary: Set construction and set member functions.
description: Set construction and set member functions.
icon: phosphor-duotone:circles-three
order: 15
---

Set construction and set member functions. 21 entries. This page is generated from the MatchBox source; see the [function reference index](index.md) for how to read the tables and what each gate means.

| Function | Forms | Gate | Notes |
| --- | --- | --- | --- |
| `listToSet` | `listToSet( ... )`, `string.listToSet( ... )` | always | Creates a set from a list. |
| `objectToSet` | `objectToSet( ... )` | always |  |
| `setNew` | `setNew( ... )` | always | Creates a set; the first argument may be a type such as "linked" (keeps insertion order). |
| `setOf` | `setOf( ... )` | always | Creates a set from its arguments; duplicates are dropped. |
| `structKeySet` | `structKeySet( ... )`, `struct.keySet( ... )` | always |  |
| `structValueSet` | `structValueSet( ... )`, `struct.valueSet( ... )` | always |  |
| `toSet` | `toSet( ... )`, `array.toSet( ... )` | always | Creates a set from an array. |
| `array.addAll` | `array.addAll( ... )` | always | Appends all values of another array in place. |
| `array.difference` | `array.difference( ... )` | always |  |
| `array.has` | `array.has( ... )` | always | Returns true when the array contains the value. |
| `array.intersection` | `array.intersection( ... )` | always |  |
| `array.isCaseSensitive` | `array.isCaseSensitive( ... )` | always |  |
| `array.isDisjointFrom` | `array.isDisjointFrom( ... )` | always |  |
| `array.isSubsetOf` | `array.isSubsetOf( ... )` | always |  |
| `array.isSupersetOf` | `array.isSupersetOf( ... )` | always |  |
| `array.remove` | `array.remove( ... )` | always | Removes the element equal to the value (not the element at that index) and returns the array. |
| `array.removeAll` | `array.removeAll( ... )` | always | Removes every element that appears in the other array. |
| `array.retainAll` | `array.retainAll( ... )` | always | Keeps only the elements that also appear in the other array. |
| `array.symmetricDifference` | `array.symmetricDifference( ... )` | always |  |
| `array.toArray` | `array.toArray( ... )` | always |  |
| `array.union` | `array.union( ... )` | always |  |