FlexibleKey class

A flexible key class that supports up to 20 independent Object fields.

This class is designed to represent a composite key, where each objectX field can hold any type of object. It is suitable for use cases like cache keys, map keys, or other scenarios where a combination of multiple values is needed to form a unique identifier.

object1 to object20: These fields can hold any object type, such as String, int, DateTime, or custom objects.
The == operator and hashCode method ensure correct equality comparison and hash generation based on all non-null fields.
The toString() method concatenates all non-null fields into a human-readable string, joined by underscores (_), for easy debugging.

Example usage:

Comparing two identical keys:

var key1 = FlexibleKey('user', 123, 'profile');
var key2 = FlexibleKey('user', 123, 'profile');
print(key1 == key2);  // Output: true

Comparing two different keys:

var key1 = FlexibleKey('user', 123, 'profile');
var key3 = FlexibleKey('user', 456, 'profile');
print(key1 == key3);  // Output: false

Constructors

FlexibleKey.new(Object? object1, [Object? object2 = _sentinelValue, Object? object3 = _sentinelValue, Object? object4 = _sentinelValue, Object? object5 = _sentinelValue, Object? object6 = _sentinelValue, Object? object7 = _sentinelValue, Object? object8 = _sentinelValue, Object? object9 = _sentinelValue, Object? object10 = _sentinelValue, Object? object11 = _sentinelValue, Object? object12 = _sentinelValue, Object? object13 = _sentinelValue, Object? object14 = _sentinelValue, Object? object15 = _sentinelValue, Object? object16 = _sentinelValue, Object? object17 = _sentinelValue, Object? object18 = _sentinelValue, Object? object19 = _sentinelValue, Object? object20 = _sentinelValue])

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key library