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I'm trying to swap the elements inside a loop.

fn foo(nums: &mut Vec<i32>) { let mut i: usize = 0; for (j, n) in nums.iter_mut().enumerate() { if n != &0 { // swap nums[i] and nums[j]; i = i + 1; } } }

But I keep getting the same error (along cannot borrow mutable nums multiple times). What am I doing wrong?

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Maybe this is not exactly what you want but it may help.

fn main() { let mut vec = vec![1, 0, 3, 4]; let mut i = 0; for j in 0..vec.len() { if vec[j] != 0 { vec.swap(i, j); i = i + 1; } } println!("{:?}", vec); }

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