feat(wpcarro/rust): Show 1/3 json examples r/4257

See json/src/main.rs

Change-Id: I83ee6b762b741a05932832a9a87eb8161bb95d0f
Reviewed-on: https://cl.tvl.fyi/c/depot/+/5896
Reviewed-by: wpcarro <wpcarro@gmail.com>
Autosubmit: wpcarro <wpcarro@gmail.com>
Tested-by: BuildkiteCI

1 files changed, 37 insertions, 0 deletions

diff --git a/users/wpcarro/scratch/rust/json/src/main.rs b/users/wpcarro/scratch/rust/json/src/main.rs
new file mode 100644
index 000000000000..b810cfa77fe6
--- /dev/null
+++ b/users/wpcarro/scratch/rust/json/src/main.rs
@@ -0,0 +1,37 @@
+use serde_json::json;
+
+// From the serde_json docs:
+//
+// > There are three common ways that you might find yourself needing to work with
+// > JSON data in Rust.
+// >
+// > 1. As text data. An unprocessed string of JSON data that you receive on an
+// >    HTTP endpoint, read from a file, or prepare to send to a remote server.
+// > 2. As an untyped or loosely typed representation. Maybe you want to check
+// >    that some JSON data is valid before passing it on, but without knowing
+// >    the structure of what it contains. Or you want to do very basic
+// >    manipulations like insert a key in a particular spot.
+// > 3. As a strongly typed Rust data structure. When you expect all or most of
+// >    your data to conform to a particular structure and want to get real work
+// >    done without JSON’s loosey-goosey nature tripping you up.
+//
+// So let's take a look at all three...
+
+// 1) Reading/writing from/to plain text.
+//    TL;DR:
+//    - read:  serde_json::from_str(data)
+//    - write: x.to_string()
+fn one() {
+    let data = json!({
+        "fname": "William",
+        "lname": "Carroll",
+        "age": 30,
+    })
+    .to_string();
+
+    println!("result: {:?}", data);
+}
+
+fn main() {
+    one()
+}