Ch. 17 §05: describe how to use Streams with Iterators

Also start laying the foundation for (a) showing how that interacts with
previous material, e.g. around slow operations; and (b) showing how it
composes nicely with other async operations, e.g. timeouts, throttling,
and (maybe!) even merging streams.

listings/ch17-async-await/listing-17-36/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "async_await"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+[dependencies]
+trpl = { path = "../../../packages/trpl" }

listings/ch17-async-await/listing-17-36/src/main.rs

@@ -0,0 +1,8 @@
+fn main() {
+    trpl::block_on(async {
+        // ANCHOR: range
+        let values = 1..101;
+        let iter = values.map(|n| n * 2);
+        // ANCHOR_END: range
+    });
+}