Represents a unique set of values.
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Adds a new item to the set.
| Name | Type | Description |
|---|---|---|
key |
Object |
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Returns true if it was added to the set; false if the key is already present.
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Returns true if the key is present in the set.
Removes the item from set.
| Name | Type | Description |
|---|---|---|
key |
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Returns true if the key existed and was removed, otherwise it returns false.
Returns an array containing the set items.
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