Rust Tutorials

How to Filter Items of a Vector based on a Condition in Rust

How to Filter Items of a Vector based on a Condition in Rust ?

Answer

To filter items of a vector based on a condition in Rust, you can use the `iter` method combined with iterator adapters like `filter` or `filter_map`.

✐ Examples

1 Filter Items Greater Than a Threshold

In this example,

First, you define a vector containing the elements you want to filter.
Next, you specify the condition for filtering, such as greater than a threshold.
Then, you use the `iter` method to create an iterator over the vector elements.
Next, you use the `filter` method to filter elements based on the specified condition.
Finally, you collect the filtered elements into a new vector.

Rust Program

fn main() {
    // Define a vector containing elements
    let vector = vec![1, 5, 10, 15, 20];

    // Specify the threshold for filtering
    let threshold = 10;

    // Filter items greater than the threshold
    let filtered_vector: Vec<_> = vector.iter().filter(|&x| *x > threshold).cloned().collect();

    // Print the filtered vector
    println!("{:?}", filtered_vector);
}

Output

[15, 20]

2 Filter Items Meeting a Condition

In this example,

Define a vector containing elements.
Specify the condition for filtering.
Use the `iter` method to create an iterator over the vector elements.
Use the `filter` method with a closure to filter items meeting the condition.
Collect the filtered elements into a new vector.

Rust Program

fn main() {
    // Define a vector containing elements
    let vector = vec![1, 5, 10, 15, 20];

    // Specify the condition for filtering
    let condition = |&x| x % 2 == 0;  // Select even numbers

    // Filter items meeting the condition
    let filtered_vector: Vec<_> = vector.iter().filter(|&x| condition(x)).cloned().collect();

    // Print the filtered vector
    println!("{:?}", filtered_vector);
}

Output

[10, 20]

Summary

In this tutorial, we learned How to Filter Items of a Vector based on a Condition in Rust language with well detailed examples.

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How to Filter Items of a Vector based on a Condition in Rust

How to Filter Items of a Vector based on a Condition in Rust ?

Answer

✐ Examples

1 Filter Items Greater Than a Threshold

Rust Program

Output

2 Filter Items Meeting a Condition

Rust Program

Output

Summary

More Rust Vectors Tutorials