public/subjects/step_iterator

step_iterator

Instructions

• Create an Iterator (by implementing the std::iter::Iterator trait) that iterates through the values from beg to end (including end) in the indicated steps.

  • The name of your iterator will be StepIterator and it must be generic so you can use any integer value: i8,..,i64, u8,..,u64 or floating point number f32,..,f64

  • If the steps do not allow to attain the end of the sequence, only the last value inferior to the end of the series will be returned (See Usage)

• Define the associated function: new which creates a new Step iterator:

Expected Functions and Structures

pub struct StepIterator<T> {
...
}

use std::ops::Add;
impl StepIterator<T> {
	pub fn new(beg: T, end: T, step: T) -> Self {
	}
}

impl std::iter::Iterator for StepIterator<T> {
}

Usage

Here is a program to test your function.

use step_iterator::*;

fn main() {
	for v in StepIterator::new(0, 100, 10) {
		print!("{},", v);
	}
	println!();

	for v in StepIterator::new(0, 100, 12) {
		print!("{},", v)
	}
	println!();
}

And its output:

student@ubuntu:~/step_iterator/test$ cargo run
0,10,20,30,40,50,60,70,80,90,100,
0,12,24,36,48,60,72,84,96,
student@ubuntu:~/step_iterator/test$