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Add empty slice example #1538

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May 8, 2022
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Add empty slice example #1538

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Add empty slice example
balroggg May 8, 2022
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Remove empty spaces
balroggg May 8, 2022
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11 changes: 8 additions & 3 deletions src/primitives/array.md
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Original file line number Diff line number Diff line change
Expand Up @@ -16,8 +16,8 @@ use std::mem;

// This function borrows a slice
fn analyze_slice(slice: &[i32]) {
println!("first element of the slice: {}", slice[0]);
println!("the slice has {} elements", slice.len());
println!(" first element of the slice: {}", slice[0]);
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println!(" the slice has {} elements", slice.len());
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}

fn main() {
Expand Down Expand Up @@ -48,7 +48,12 @@ fn main() {
println!("borrow a section of the array as a slice");
analyze_slice(&ys[1 .. 4]);

// Example of empty slice `&[]`
let empty_array: [u32; 0] = [];
assert_eq!(&empty_array, &[]);
assert_eq!(&empty_array, &[][..]); // same but more verbose

// Out of bound indexing causes compile error
println!("{}", xs[5]);
//println!("{}", xs[5]);
}
```