rustHow do you filter a Rust string?

Filtering a Rust string can be done using the filter() method. This method takes a closure as an argument and returns a new string with only the characters that satisfy the closure's condition.

Example

let my_string = "Hello World!";
let filtered_string = my_string.filter(|c| c.is_alphabetic());

Output example

HelloWorld

The code above filters the string my_string and stores the result in filtered_string. The closure passed to filter() checks if each character is alphabetic and only keeps those that are.

The parts of the code are:

• let my_string = "Hello World!";: This declares a string variable my_string and assigns it the value "Hello World!".
• let filtered_string = my_string.filter(|c| c.is_alphabetic());: This declares a string variable filtered_string and assigns it the result of calling filter() on my_string. The closure passed to filter() checks if each character is alphabetic and only keeps those that are.

Helpful links

• Rust Documentation - Strings
• Rust Documentation - Closures

Edit this code on GitHub