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Students do not have the necessary knowledge at this point to understand what's happening with the iterator combinators. This topic is covered well by the dedicated exercises about iterators later. closes #2102
27 lines
501 B
Rust
27 lines
501 B
Rust
fn vec_loop(input: &[i32]) -> Vec<i32> {
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let mut output = Vec::new();
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for element in input {
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// TODO: Multiply each element in the `input` slice by 2 and push it to
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// the `output` vector.
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}
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output
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}
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fn main() {
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// You can optionally experiment here.
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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 test_vec_loop() {
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let input = [2, 4, 6, 8, 10];
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let ans = vec_loop(&input);
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assert_eq!(ans, [4, 8, 12, 16, 20]);
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}
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}
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