added examples of closures
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@@ -959,13 +959,15 @@ impl str {
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/// assert_eq!(s.find("Léopard"), Some(13));
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/// assert_eq!(s.find("Léopard"), Some(13));
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/// ```
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/// ```
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///
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///
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/// More complex patterns with closures:
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/// More complex patterns using point-free style and closures:
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///
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///
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/// ```
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/// ```
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/// let s = "Löwe 老虎 Léopard";
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/// let s = "Löwe 老虎 Léopard";
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///
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///
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/// assert_eq!(s.find(char::is_whitespace), Some(5));
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/// assert_eq!(s.find(char::is_whitespace), Some(5));
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/// assert_eq!(s.find(char::is_lowercase), Some(1));
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/// assert_eq!(s.find(char::is_lowercase), Some(1));
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/// assert_eq!(s.find(|c: char| c.is_whitespace()), Some(5));
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/// assert_eq!(s.find(|c: char| c.is_lowercase()), Some(1));
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/// ```
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/// ```
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///
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///
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/// Not finding the pattern:
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/// Not finding the pattern:
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