rc-js-util/docs/rc-js-util.dirtycheckeduniquecollection.mapinitializeadd_1.md

A collection of TS and C++ utilities to help writing performant and correct applications, achieved through strict typing and (removable) invariant checking.

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[Home](./index.md) &gt; [rc-js-util](./rc-js-util.md) &gt; [DirtyCheckedUniqueCollection](./rc-js-util.dirtycheckeduniquecollection.md) &gt; [mapInitializeAdd](./rc-js-util.dirtycheckeduniquecollection.mapinitializeadd_1.md)

## DirtyCheckedUniqueCollection.mapInitializeAdd() method

**Signature:**

```typescript
static mapInitializeAdd<TKey extends object, TValue>(map: WeakMap<TKey, IDirtyCheckedUniqueCollection<TValue>>, key: TKey, value: TValue): boolean;
```

## Parameters

<table><thead><tr><th>

Parameter


</th><th>

Type


</th><th>

Description


</th></tr></thead>
<tbody><tr><td>

map


</td><td>

WeakMap&lt;TKey, [IDirtyCheckedUniqueCollection](./rc-js-util.idirtycheckeduniquecollection.md)<!-- -->&lt;TValue&gt;&gt;


</td><td>


</td></tr>
<tr><td>

key


</td><td>

TKey


</td><td>


</td></tr>
<tr><td>

value


</td><td>

TValue


</td><td>


</td></tr>
</tbody></table>
**Returns:**

boolean