Question

How to print HashSet in Rust

Answer 1

use std::collections::HashSet;
 
fn main() {
    let mut hs = HashSet::new();
 
    hs.insert("Rust");
    hs.insert("C");
    hs.insert("C");
    hs.insert("C++");
    hs.insert("Java");
 
    println!("{:?}", hs);
}
 
 
  
  
/*
run:
  
{"C++", "C", "Rust", "Java"}
  
*/

 

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Answer 2

use std::collections::HashSet;
 
fn main() {
    let mut hs = HashSet::new();
 
    hs.insert("Rust");
    hs.insert("C");
    hs.insert("C");
    hs.insert("C++");
    hs.insert("Java");
 
    for s in &hs {
        println!("{}", s);
    }
}
 
 
  
  
/*
run:
  
C
C++
Rust
Java
  
*/

 

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Answer 3

use std::collections::HashSet;
  
fn main() {
    let mut hs = HashSet::new();
  
    hs.insert("Rust");
    hs.insert("C");
    hs.insert("C");
    hs.insert("C++");
    hs.insert("Java");
  
    for s in hs.iter() {
      println!("{}", s);
   }
}




/*
run:

Java
C
Rust
C++

*/

 

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