Function containsDuplicateValues

containsDuplicateValues<V>(
array: V[] | readonly V[],
keyFunction?: (itemToMakeStringFor: V) => string,
): boolean
Returns true if array contains duplicate values.
```
containsDuplicateValues(['a','b','a']); // True
containsDuplicateValues([
 { name: 'Apple' },
 { name: 'Apple' }
]); // True
```
Uses JSON.toString() by default to compare values.

See also:
- containsDuplicateInstances: Compare based on reference, rather than value
- unique Get unique set of values in an array
Type Parameters
- V
Parameters
- array: V[] | readonly V[]
  Array to examine
- keyFunction: (itemToMakeStringFor: V) => string = ...
  Function to generate key string for object, uses JSON.stringify by default.
  - (itemToMakeStringFor: V): string
    A default converter to string that uses JSON.stringify if its an object, or the thing itself if it's a string
    
    Parameters
    itemToMakeStringFor: V
    Returns string
Returns boolean