mirror of
https://github.com/rust-lang/rustlings
synced 2024-11-05 00:00:12 +00:00
32 lines
737 B
Rust
32 lines
737 B
Rust
// option1.rs
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// This example panics because the second time it calls `pop`, the `vec`
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// is empty, so `pop` returns `None`, and `unwrap` panics if it's called
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// on `None`. Handle this in a more graceful way than calling `unwrap`!
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// Execute `rustlings hint option1` for hints :)
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// I AM NOT DONE
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pub fn pop_too_much() -> bool {
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let mut list = vec![3];
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let last = list.pop().unwrap();
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println!("The last item in the list is {:?}", last);
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let second_to_last = list.pop().unwrap();
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println!(
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"The second-to-last item in the list is {:?}",
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second_to_last
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);
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true
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn should_not_panic() {
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assert!(pop_too_much());
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}
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}
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