> Aztec.nr API reference, v6.0.0 (mainnet and testnet). Index: https://docs.aztec.network/aztec-nr-api/v6.0.0/llms.txt

# Function subbvec

Module: `noir_aztec::utils::array::subbvec`

```rust
pub fn subbvec<T, let SrcMaxLen: u32, let DstMaxLen: u32>(
    bvec: BoundedVec<T, SrcMaxLen>,
    offset: u32,
) -> BoundedVec<T, DstMaxLen>
```

Returns `DstMaxLen` elements from a source BoundedVec, starting at `offset`. `offset` must not be larger than the original length, and `DstLen` must not be larger than the total number of elements past `offset` (including the zeroed elements past `len()`).

Only elements at the beginning of the vector can be removed: it is not possible to also remove elements at the end of the vector by passing a value for `DstLen` that is smaller than `len() - offset`.

Examples:

```rust
let foo = BoundedVec::<_, 10>::from_array([1, 2, 3, 4, 5]);
assert_eq(subbvec(foo, 2), BoundedVec::<_, 8>::from_array([3, 4, 5]));

let bar: BoundedVec<_, 1> = subbvec(foo, 2); // fails - we can't return just 1 element since 3 remain
let baz: BoundedVec<_, 10> = subbvec(foo, 3); // fails - we can't return 10 elements since only 7 remain
```