rustHow to convert a Rust HashMap to a JSON string?

To convert a Rust HashMap to a JSON string, you can use the serde_json crate.

Example code

use serde_json::json;

let mut map = HashMap::new();
map.insert("key1", "value1");
map.insert("key2", "value2");

let json_string = json!(map).to_string();

Output example

"{"key1":"value1","key2":"value2"}"

Code explanation

• use serde_json::json;: imports the json function from the serde_json crate.
• let mut map = HashMap::new();: creates a new empty HashMap.
• map.insert("key1", "value1");: inserts a key-value pair into the HashMap.
• let json_string = json!(map).to_string();: converts the HashMap to a JSON string.

Helpful links

• serde_json crate
• serde_json documentation

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