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items.DistinctBy(x => x.Id); // 1 2 3 | items.DistinctBy(x => x.Id); // 1 2 3 | ||
items.DistinctBy(x => x.Name); // 1 2 2 | items.DistinctBy(x => x.Name); // 1 2 2 | ||
</kode> | |||
== ExceptBy == | |||
Returns the set of elements in the first sequence which aren't in the second sequence, according to a given key selector. | |||
<kode lang='cs'> | |||
var items2 = new[] | |||
{ | |||
new { Id = 2, Name = "One" } | |||
}; | |||
items.ExceptBy(items2, x => x.Id); // 1 3 | |||
items.ExceptBy(items2, x => x.Name); // 2 2 | |||
</kode> | </kode> | ||
Version du 14 novembre 2020 à 23:03
Links
Add
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dotnet add package MoreLINQ |
Operators
Aggregate
Batch
Batches the source sequence into sized buckets.
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Enumerable
.Range(1, 10)
.Batch(3); // split the sequence into sequences of max length 3
// [1, 2, 3]
// [4, 5, 6]
// [7, 8, 9]
// [10]
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Cartesian
Returns the Cartesian product of two or more sequences by combining each element from the sequences and applying a user-defined projection to the set.
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new[] { "A", "B" }
.Cartesian(
new[] { 1, 2 },
(x, y) => $"{x}{y}");
// A1
// A2
// B1
// B2
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DistinctBy
Returns all distinct elements of the given source, where "distinctness" is determined via a projection and the default equality comparer for the projected type.
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var items = new[]
{
new { Id = 1, Name = "One" },
new { Id = 2, Name = "Two" },
new { Id = 3, Name = "One" },
new { Id = 2, Name = "Two again" }
};
items.DistinctBy(x => x.Id); // 1 2 3
items.DistinctBy(x => x.Name); // 1 2 2
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ExceptBy
Returns the set of elements in the first sequence which aren't in the second sequence, according to a given key selector.
|
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var items2 = new[]
{
new { Id = 2, Name = "One" }
};
items.ExceptBy(items2, x => x.Id); // 1 3
items.ExceptBy(items2, x => x.Name); // 2 2
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