Question

How to remove the last occurrence of a word from a string in Rust

Answer 1

fn remove_last_occurrence_of_a_word_from_a_string(str: &str, word: &str) -> String {
    // Find the position of the last occurrence of word in str
    if let Some(pos) = str.rfind(word) {
        let mut result = String::from(&str[..pos]);
        result.push_str(&str[pos + word.len()..]);
        return result;
    }
    
    str.to_string()
}

fn main() {
    let str = "rust c python rust c++ java c# rust php";
    let word = "rust";

    let result = remove_last_occurrence_of_a_word_from_a_string(str, word);

    println!("{}", result);
}


  
/*
run:

rust c python rust c++ java c#  php

*/

 

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