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AK+Tests: Add Vector::find_first_index_if()
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parent
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89e55c5297
Notes:
sideshowbarker
2024-07-17 02:59:43 +09:00
Author: https://github.com/AtkinsSJ Commit: https://github.com/SerenityOS/serenity/commit/89e55c5297 Pull-request: https://github.com/SerenityOS/serenity/pull/18289
@ -796,6 +796,15 @@ public:
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return {};
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}
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template<typename TUnaryPredicate>
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Optional<size_t> find_first_index_if(TUnaryPredicate&& finder) const
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{
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auto maybe_result = AK::find_if(begin(), end(), finder);
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if (maybe_result == end())
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return {};
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return maybe_result.index();
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}
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void reverse()
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{
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for (size_t i = 0; i < size() / 2; ++i)
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@ -423,6 +423,14 @@ TEST_CASE(should_find_index)
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EXPECT(!v.find_first_index(42).has_value());
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}
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TEST_CASE(should_find_predicate_index)
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{
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Vector<int> v { 1, 2, 3, 4, 0, 6, 7, 8, 0, 0 };
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EXPECT_EQ(4u, v.find_first_index_if([](auto const v) { return v == 0; }).value());
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EXPECT(!v.find_first_index_if([](auto const v) { return v == 123; }).has_value());
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}
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TEST_CASE(should_contain_start)
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{
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// Tests whether value is found if at the start of the range.
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