replace a substring in a string in rust

There are different ways to replace a substring in a string in Rust. One common approach is to convert the string into a mutable string, then use the replace method to replace the substring. Here's an example:


main.rs
let mut example_string = String::from("hello world");
example_string = example_string.replace("world", "Rust");
println!("{}", example_string); // prints "hello Rust"
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This method replaces all occurrences of the substring with the new value.

Alternatively, you can use the replace_range method to replace a specific range of characters in the string. Here's an example:


main.rs
let mut example_string = String::from("hello world");
let start_index = example_string.find("world").unwrap();
let end_index = start_index + "world".len();
example_string.replace_range(start_index..end_index, "Rust");
println!("{}", example_string); // prints "hello Rust"
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This method replaces the specified range of characters with the new value.

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