Function getOrSetFromMap

Given an map, tries to get the given key in that map. If the key is not in that map, then the given createCallback is used to create a new value which is then stored in the given map and returned. Automatically handles an async createCallback.

Example

// instead of doing this
if (!myMap.get(myKey)) {
    myMap.set(myKey, {});
}
myMap.get(myKey)![nextKey] = 'some value';

// do this
getOrSetInObject(myMap, myKey, () => {
    return {};
});
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Package

@augment-vir/common