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Diffstat (limited to 'users/wpcarro/scratch/rust/json/src')
-rw-r--r-- | users/wpcarro/scratch/rust/json/src/main.rs | 89 |
1 files changed, 0 insertions, 89 deletions
diff --git a/users/wpcarro/scratch/rust/json/src/main.rs b/users/wpcarro/scratch/rust/json/src/main.rs deleted file mode 100644 index 6481224fffe7..000000000000 --- a/users/wpcarro/scratch/rust/json/src/main.rs +++ /dev/null @@ -1,89 +0,0 @@ -use serde::{Deserialize, Serialize}; -use serde_json::{json, Value}; - -// 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... - -//////////////////////////////////////////////////////////////////////////////// -// Types -//////////////////////////////////////////////////////////////////////////////// - -#[derive(Serialize, Deserialize, Debug)] -struct Person { - fname: String, - lname: String, - age: u8, -} - -//////////////////////////////////////////////////////////////////////////////// -// Functions -//////////////////////////////////////////////////////////////////////////////// - -// 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); -} - -// 2) Parse into a loosely typed representation; mutate it; serialize it back. -// TL;DR: -// - read: serde_json::from_str(data) -// - write: x.to_string() -fn two() { - let data = r#"{"fname":"William","lname":"Carroll","age":30}"#; - - let mut parsed: Value = serde_json::from_str(data).unwrap(); - parsed["fname"] = json!("Norm"); - parsed["lname"] = json!("Macdonald"); - parsed["age"] = json!(61); - - let result = parsed.to_string(); - println!("result: {:?}", result); -} - -// 3) Parse into a strongly typed structure. -// TL;DR: -// - read: serde_json::from_str(data) -// - write: serde_json::to_string(x).unwrap() -fn three() { - let data = r#"{"fname":"William","lname":"Carroll","age":30}"#; - - let mut read: Person = serde_json::from_str(data).unwrap(); - read.fname = "Norm".to_string(); - read.lname = "Macdonald".to_string(); - read.age = 61; - - let write = serde_json::to_string(&read).unwrap(); - println!("result: {:?}", write); -} - -//////////////////////////////////////////////////////////////////////////////// -// Main -//////////////////////////////////////////////////////////////////////////////// - -fn main() { - three() -} |