v0.2.0 — sorted-map surface

Adds sorted-map query operations and structural helpers.

Added

• Min() — smallest (key, value, ok).
• Max() — largest (key, value, ok).
• Ceiling(target) — successor (smallest key ≥ target).
• Floor(target) — predecessor (largest key ≤ target).
• Clone() — independent structural copy.
• Clear() — O(1) remove-all.
• Six new ExampleTree_* functions (12 total).

Documented

• Nil-key / empty-key equivalence contract across doc.go, Put, Get, Delete.

Tests

• +17 unit tests (92 total).
• Fuzzer extended with Min / Max / Ceiling / Floor / Clone / Clear operations, cross-checked against a sorted oracle.

Install

go get github.com/KentBeck/AdaptiveRadixTree2@v0.2.0

Compare: v0.1.0...v0.2.0