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| author | Ralf Jung <post@ralfj.de> | 2019-07-13 15:16:05 +0200 |
|---|---|---|
| committer | Ralf Jung <post@ralfj.de> | 2019-07-13 15:16:05 +0200 |
| commit | d73c23d114d109d7c48c9447f53bcba533effa16 (patch) | |
| tree | df38b216d4c4760b1308d1ed10b596e9a5541de4 /src/libcore | |
| parent | 4a95e9704de0eeaecba55df102c1129e79a3a929 (diff) | |
| download | rust-d73c23d114d109d7c48c9447f53bcba533effa16.tar.gz rust-d73c23d114d109d7c48c9447f53bcba533effa16.zip | |
explain how to search without owned data
Diffstat (limited to 'src/libcore')
| -rw-r--r-- | src/libcore/slice/mod.rs | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/libcore/slice/mod.rs b/src/libcore/slice/mod.rs index 363ae088275..c3eb2ec9dc2 100644 --- a/src/libcore/slice/mod.rs +++ b/src/libcore/slice/mod.rs @@ -1263,6 +1263,14 @@ impl<T> [T] { /// assert!(v.contains(&30)); /// assert!(!v.contains(&50)); /// ``` + /// + /// If you only have a borrowed `T`, use `any`: + /// + /// ``` + /// let v = [String::from("hello"), String::from("world")]; + /// assert!(v.iter().any(|e| e == "hello")); + /// assert!(!v.iter().any(|e| e == "hi")); + /// ``` #[stable(feature = "rust1", since = "1.0.0")] pub fn contains(&self, x: &T) -> bool where T: PartialEq |