mirror of
https://github.com/nushell/nushell
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79 lines
2 KiB
Markdown
79 lines
2 KiB
Markdown
# nu-json
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[](https://crates.io/crates/nu-json)
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> a fork of [serde_hjson](https://crates.io/crates/serde-hjson).
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> The changes made to this crate are kept in [CHANGELOG](/crates/nu-json/CHANGELOG.md).
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The Rust implementation of Hjson is based on the [Serde JSON Serialization Library](https://github.com/serde-rs/json).
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This crate is a Rust library for parsing and generating Human JSON [Hjson](https://hjson.github.io). It is built upon [Serde](https://github.com/serde-rs/serde), a high performance generic serialization framework.
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# Install
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This crate works with Cargo and can be found on [crates.io](https://crates.io/crates/nu-json) with a `Cargo.toml` like:
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```toml
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[dependencies]
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serde = "1"
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nu-json = "0.76"
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```
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## From the Commandline
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Add with:
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```
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cargo add serde
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cargo add nu-json
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```
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# Usage
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```rust
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extern crate serde;
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extern crate nu_json;
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use nu_json::{Map,Value};
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fn main() {
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// Now let's look at decoding Hjson data
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let sample_text=r#"
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{
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# specify rate in requests/second
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rate: 1000
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array:
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[
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foo
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bar
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]
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}"#;
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// Decode and unwrap.
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let mut sample: Map<String, Value> = nu_json::from_str(&sample_text).unwrap();
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// scope to control lifetime of borrow
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{
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// Extract the rate
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let rate = sample.get("rate").unwrap().as_f64().unwrap();
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println!("rate: {}", rate);
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// Extract the array
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let array : &mut Vec<Value> = sample.get_mut("array").unwrap().as_array_mut().unwrap();
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println!("first: {}", array.first().unwrap());
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// Add a value
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array.push(Value::String("baz".to_string()));
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}
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// Encode to Hjson
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let sample2 = nu_json::to_string(&sample).unwrap();
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println!("Hjson:\n{}", sample2);
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}
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```
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# DOCS
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At the moment, the documentation on [serde_hjson](https://docs.rs/serde-hjson/0.9.1/serde_hjson/) / [serde_json](https://docs.rs/serde_json/1.0.93/serde_json/) is also relevant for nu-json.
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