rustHow do I use a String Buffer in Rust?

String Buffer is a type of data structure used to store and manipulate strings in Rust. It is similar to a vector, but instead of storing elements of any type, it stores characters.

Example code

let mut s = String::new();
let mut s_buf = String::with_capacity(10);

s_buf.push_str("Hello");
s_buf.push(' ');
s_buf.push_str("World!");

s.push_str(&s_buf);

println!("{}", s);

Output example

Hello World!

Code explanation

• let mut s = String::new();: creates a new empty string
• let mut s_buf = String::with_capacity(10);: creates a new string buffer with capacity of 10
• s_buf.push_str("Hello");: pushes the string "Hello" into the string buffer
• s_buf.push(' ');: pushes a single character ' ' into the string buffer
• s_buf.push_str("World!");: pushes the string "World!" into the string buffer
• s.push_str(&s_buf);: pushes the contents of the string buffer into the string
• println!("{}", s);: prints the contents of the string

Helpful links

• Rust String Buffer Documentation

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