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  1. fn main() {
  2.     let mut s = std::collections::HashSet::new();
  3.     println!("s = {:?}", s);
  4.     let evens: std::collections::HashSet<_> = (0..10)
  5.         .filter(|&i| i % 2 == 0)
  6.         .collect();
  7.     println!("evens = {:?}", evens);
  8.     s.insert(8);
  9.     println!("s = {:?}", s);
  10.     let cardinality = s.len();
  11.     println!("cardinality = {:?}", cardinality);
  12.     let has_one = s.contains(&1);
  13.     println!("has_one = {:?}", has_one);
  14.     for &x in &s {
  15.         println!("{}", x);
  16.     }
  17.     s.remove(&8);
  18.     println!("s = {:?}", s);
  19. }
  20.  
Success #stdin #stdout 0s 4372KB
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s = {}
evens = {0, 8, 2, 6, 4}
s = {8}
cardinality = 1
has_one = false
8
s = {}
https://ideone.com/gq6tB7
set
language:
Rust (rust 1.56)
created:
4 years ago
visibility:
public

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