Rust Tutorials

How to Remove Specific Item from a Vector in Rust

◀ Previous Next ▶

How to Remove Specific Item from a Vector in Rust ?

Answer

To remove a specific item from a vector in Rust, you can use the retain method or the iter().filter() method.

✐ Examples

1 Remove Specific Item Using retain Method

In this example,

We start by creating a mutable vector named vec with some integer values.
We specify the item we want to remove and store it in a variable named item_to_remove.
We use the retain method to remove the specified item. The retain method takes a closure that determines which elements to keep; elements for which the closure returns false are removed.
In the closure, we compare each element with item_to_remove and return true only if the element is not equal to item_to_remove.
Finally, we print the modified vector to see the result.

Rust Program

fn main() {
    let mut vec = vec![10, 20, 30, 40, 50];
    let item_to_remove = 30;
    vec.retain(|&x| x != item_to_remove);
    println!("Vector after removing the item {}: {:?}", item_to_remove, vec);
}

Output

Vector after removing the item 30: [10, 20, 40, 50]

2 Remove Specific Item Using iter().filter() Method

In this example,

We start by creating a vector named vec with some integer values.
We specify the item we want to remove and store it in a variable named item_to_remove.
We use the iter() method to create an iterator over the vector.
We then use the filter method to create a new iterator that only includes elements not equal to item_to_remove. The filter method takes a closure that returns true for elements to keep and false for elements to exclude.
We collect the results into a new vector using the collect method.
Finally, we print the new vector to see the result.

Rust Program

fn main() {
    let vec = vec![10, 20, 30, 40, 50];
    let item_to_remove = 30;
    let vec_new: Vec<i32> = vec.iter().filter(|&&x| x != item_to_remove).cloned().collect();
    println!("Vector after removing the item {}: {:?}", item_to_remove, vec_new);
}

Output

Vector after removing the item 30: [10, 20, 40, 50]

Summary

In this tutorial, we learned How to Remove Specific Item from a Vector in Rust language with well detailed examples.

◀ Previous Next ▶

Rust Tutorials

Rust How-Tos

How to Remove Specific Item from a Vector in Rust

How to Remove Specific Item from a Vector in Rust ?

Answer

✐ Examples

1 Remove Specific Item Using retain Method

Rust Program

Output

2 Remove Specific Item Using iter().filter() Method

Rust Program

Output

Summary

More Rust Vectors Tutorials