DOC-3933: final 8 tabbed code examples (#2784)

doctests/dt-topk.js

@@ -0,0 +1,48 @@
+// EXAMPLE: topk_tutorial
+// HIDE_START
+import assert from 'assert';
+import { createClient } from 'redis';
+
+const client = createClient();
+await client.connect();
+// HIDE_END
+
+// REMOVE_START
+await client.flushDb();
+// REMOVE_END
+
+// STEP_START topk
+const res1 = await client.topK.reserve('bikes:keywords', 5, {
+    width: 2000,
+    depth: 7,
+    decay: 0.925
+});
+console.log(res1);  // >>> OK
+
+const res2 = await client.topK.add('bikes:keywords', [
+  'store',
+  'seat',
+  'handlebars',
+  'handles',
+  'pedals',
+  'tires',
+  'store',
+  'seat'
+]);
+console.log(res2);  // >>> [null, null, null, null, null, 'handlebars', null, null]
+
+const res3 = await client.topK.list('bikes:keywords');
+console.log(res3);  // >>> ['store', 'seat', 'pedals', 'tires', 'handles']
+
+const res4 = await client.topK.query('bikes:keywords', ['store', 'handlebars']);
+console.log(res4);  // >>> [1, 0]
+// STEP_END
+
+// REMOVE_START
+assert.equal(res1, 'OK')
+assert.deepEqual(res2, [null, null, null, null, null, 'handlebars', null, null])
+assert.deepEqual(res3, ['store', 'seat', 'pedals', 'tires', 'handles'])
+assert.deepEqual(res4, [1, 0])
+await client.quit();
+// REMOVE_END
+