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// Copyright 2021 Datafuse Labs | ||
// | ||
// Licensed under the Apache License, Version 2.0 (the "License"); | ||
// you may not use this file except in compliance with the License. | ||
// You may obtain a copy of the License at | ||
// | ||
// http://www.apache.org/licenses/LICENSE-2.0 | ||
// | ||
// Unless required by applicable law or agreed to in writing, software | ||
// distributed under the License is distributed on an "AS IS" BASIS, | ||
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
// See the License for the specific language governing permissions and | ||
// limitations under the License. | ||
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pub trait VecExt<T> { | ||
/// Remove the first element that is equal to the given item. | ||
fn remove_first(&mut self, item: &T) -> Option<T> | ||
where T: PartialEq; | ||
} | ||
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impl<T> VecExt<T> for Vec<T> { | ||
fn remove_first(&mut self, item: &T) -> Option<T> | ||
where T: PartialEq { | ||
let pos = self.iter().position(|x| x == item)?; | ||
Some(self.remove(pos)) | ||
} | ||
} |
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