📚 docs(README): Add simple example.

README.md

@@ -8,6 +8,27 @@ See [docs](https://trie-data-structure.github.io/uncompressed-trie/index.html).
 > `regeneratorRuntime` to be defined, for instance by importing
 > [regenerator-runtime/runtime](https://www.npmjs.com/package/regenerator-runtime).
 
+```js
+import {Trie, ArrayNode} from '@trie-data-structure/uncompressed-trie';
+import {range} from '@iterable-iterator/range';
+import {map} from '@iterable-iterator/map';
+
+const encode = (key) => map((i) => key.charCodeAt(i), range(key.length));
+const degree = 256;
+const trie = new Trie(new ArrayNode(degree));
+
+const set = (key, value) => trie.set(encode(key), value);
+const get = (key) => trie.get(encode(key));
+
+set('abra', 1);
+set('cadabra', 2);
+set('abracadabra', 3);
+
+get('abra'); // 1
+get('cadabra'); // 2
+get('abracadabra'); // 3
+```
+
 [![License](https://img.shields.io/github/license/trie-data-structure/uncompressed-trie.svg)](https://raw.githubusercontent.com/trie-data-structure/uncompressed-trie/main/LICENSE)
 [![Version](https://img.shields.io/npm/v/@trie-data-structure/uncompressed-trie.svg)](https://www.npmjs.org/package/@trie-data-structure/uncompressed-trie)
 [![Tests](https://img.shields.io/github/workflow/status/trie-data-structure/uncompressed-trie/ci:test?event=push&label=tests)](https://github.com/trie-data-structure/uncompressed-trie/actions/workflows/ci:test.yml?query=branch:main)

test/src/example.js

@@ -0,0 +1,24 @@
+import test from 'ava';
+
+import {range} from '@iterable-iterator/range';
+import {map} from '@iterable-iterator/map';
+
+import {Trie, ArrayNode} from '../../src/index.js';
+
+test('README', (t) => {
+	// eslint-disable-next-line unicorn/prefer-code-point
+	const encode = (key) => map((i) => key.charCodeAt(i), range(key.length));
+	const degree = 256;
+	const trie = new Trie(new ArrayNode(degree));
+
+	const set = (key, value) => trie.set(encode(key), value);
+	const get = (key) => trie.get(encode(key));
+
+	set('abra', 1);
+	set('cadabra', 2);
+	set('abracadabra', 3);
+
+	t.is(get('abra'), 1);
+	t.is(get('cadabra'), 2);
+	t.is(get('abracadabra'), 3);
+});