CODEWITHSUNDEEP
vectorrust
AlgoQ
AlgoQ

Reputation: 177

How to push an item (struct type) from vector1 to vector2 in Rust?

How to push an item (struct type) from vector1 to vector2 in Rust? Can someone help me?

let mut vec1: Vec<Struct1> = vec![];

    let item1 = Struct1 {
        id: 1,
        name: "AlgoQ".to_string()
    };

    vec1.push(item1);
    let mut vec2: Vec<Struct1> = vec![];

    vec2.push(&vec1[0]);

    vec1.pop();

Error:

error[E0308]: mismatched types
  --> src/test4.rs:17:15
   |
17 |     vec2.push(&vec1[0]);
   |               ^^^^^^^^
   |               |
   |               expected struct `Struct1`, found `&Struct1`
   |               help: consider removing the borrow: `vec1[0]`

Upvotes: 0

Views: 492

Answers (1)

Denys S&#233;guret
Denys S&#233;guret

Reputation: 382150

Your item can't be at both place. You have to either

  1. remove the item from the source vector:
vec2.push(vec1.remove(0));

Here, as you also want to pop from the first vector, you may directly do

if let Some(item) = vec1.pop() {
    vec2.push(item);
}

But be careful that pop removes at the end, not at index 0 so your snippet is a little obscure regarding your exact intent.

  1. or clone the item (assuming it can be cloned)
vec2.push(vec1[0].clone());

Now, if you really want the item to be, conceptually, at two places, you may store references (ie &Struct1) or indexes in your second vec.

Upvotes: 1

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