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124708acd9
This avoids confusion between `.into_iter()` and `.iter()`. On a slice, both methods do the same (correct) thing. Using `.into_iter()` will result in a clippy warning about the slice not being consumed.
27 lines
1012 B
Rust
27 lines
1012 B
Rust
// When performing operations on elements within a collection, iterators are
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// essential. This module helps you get familiar with the structure of using an
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// iterator and how to go through elements within an iterable collection.
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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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#[test]
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fn iterators() {
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let my_fav_fruits = &["banana", "custard apple", "avocado", "peach", "raspberry"];
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// Create an iterator over the slice.
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let mut fav_fruits_iterator = my_fav_fruits.iter();
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assert_eq!(fav_fruits_iterator.next(), Some(&"banana"));
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assert_eq!(fav_fruits_iterator.next(), Some(&"custard apple"));
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assert_eq!(fav_fruits_iterator.next(), Some(&"avocado"));
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assert_eq!(fav_fruits_iterator.next(), Some(&"peach"));
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assert_eq!(fav_fruits_iterator.next(), Some(&"raspberry"));
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assert_eq!(fav_fruits_iterator.next(), None);
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// ^^^^ reached the end
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}
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}
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