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| (14 versions intermédiaires par le même utilisateur non affichées) | |||
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[[Category: | [[Category:.NET Application]] | ||
= Links = | = Links = | ||
* [https://github.com/morelinq/MoreLINQ#morelinq README] | * [https://github.com/morelinq/MoreLINQ#morelinq README] | ||
* [https://github.com/morelinq/examples Examples] | * [https://github.com/morelinq/examples Examples] | ||
* [https://morelinq.github.io/3. | * [https://morelinq.github.io/3.3/ref/api/html/Methods_T_MoreLinq_MoreEnumerable.htm Documentation] | ||
= Add = | = Add the package to a project = | ||
<kode lang='bash'> | <kode lang='bash'> | ||
dotnet add package MoreLINQ | dotnet add package MoreLINQ | ||
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== [https://github.com/morelinq/examples/blob/master/m/aggregate.md Aggregate] == | == [https://github.com/morelinq/examples/blob/master/m/aggregate.md Aggregate] == | ||
== Batch == | == [https://morelinq.github.io/3.3/ref/api/html/Overload_MoreLinq_MoreEnumerable_Batch.htm Batch] == | ||
Batches the source sequence into sized buckets. | Batches the source sequence into sized buckets. | ||
<kode lang='cs'> | <kode lang='cs'> | ||
| Ligne 25 : | Ligne 25 : | ||
</kode> | </kode> | ||
== Cartesian == | == [https://morelinq.github.io/3.3/ref/api/html/Overload_MoreLinq_MoreEnumerable_Cartesian.htm 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. | 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. | ||
<kode lang='cs'> | <kode lang='cs'> | ||
| Ligne 38 : | Ligne 38 : | ||
</kode> | </kode> | ||
== DistinctBy == | == [https://morelinq.github.io/3.3/ref/api/html/Overload_MoreLinq_MoreEnumerable_DistinctBy.htm 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. | Returns all distinct elements of the given source, where "distinctness" is determined via a projection and the default equality comparer for the projected type. | ||
<kode lang='cs'> | <kode lang='cs'> | ||
| Ligne 51 : | Ligne 51 : | ||
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> | |||
== [https://morelinq.github.io/3.3/ref/api/html/Overload_MoreLinq_MoreEnumerable_ExceptBy.htm 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> | |||
== [https://morelinq.github.io/3.3/ref/api/html/Overload_MoreLinq_MoreEnumerable_FallbackIfEmpty.htm FallbackIfEmpty] == | |||
Returns the elements of a sequence and falls back to another if the original sequence is empty. | |||
<kode lang='cs'> | |||
var integers = Array.Empty<int>(); | |||
integers.FallbackIfEmpty(new[] { 1, 2 }); | |||
integers.FallbackIfEmpty(1); // int[] { 1 } | |||
integers.FallbackIfEmpty(1, 2); // int[] { 1, 2 } | |||
</kode> | |||
== Left / Right / Full join == | |||
<kode lang='cs'> | |||
var a1 = new[] {1, 2, 3}; | |||
var a2 = new[] {1, 2, 4}; | |||
var lj = a1.LeftJoin( | |||
a2, | |||
x => x, // a1 key selector | |||
x => x, // a2 key selector | |||
x => (x, 0), // selector when a1 element doesn't match a2 element | |||
(x, y) => (x, y)) // match selector | |||
.ToArray(); | |||
// (1, 1) (2, 2) (3 ,0) | |||
var fj = a1.FullJoin( | |||
a2, | |||
x => x, // a1 key selector | |||
x => x, // a2 key selector | |||
x => (x, 0), // selector when a1 element doesn't match a2 element | |||
x => (0, x), // selector when a2 element doesn't match a1 element | |||
(x, y) => (x, y)) // match selector | |||
.ToArray(); | |||
// (1, 1) (2, 2) (3 ,0) (0, 4) | |||
</kode> | |||
* [https://morelinq.github.io/3.3/ref/api/html/Overload_MoreLinq_MoreEnumerable_LeftJoin.htm Left join] | |||
* [https://morelinq.github.io/3.3/ref/api/html/Overload_MoreLinq_MoreEnumerable_FullJoin.htm Full join] | |||
= [https://stackoverflow.com/questions/8474882/ambiguous-extension-method Ambiguous call between Linq.Enumerable.ToHashSet and MoreLinq.MoreEnumerable.ToHashSet] = | |||
Workaround: move the MoreLinq using statement inside the namespace. | |||
<kode lang='cs'> | |||
// using MoreLinq; | |||
namespace MyNamespace; | |||
using MoreLinq; | |||
</kode> | </kode> | ||
Dernière version du 19 août 2023 à 11:37
Links
Add the package to a project
|
dotnet add package MoreLINQ |
Operators
Aggregate
Batch
Batches the source sequence into sized buckets.
|
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]
|
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.
|
|
new[] { "A", "B" }
.Cartesian(
new[] { 1, 2 },
(x, y) => $"{x}{y}");
// A1
// A2
// B1
// B2
|
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.
|
|
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
|
ExceptBy
Returns the set of elements in the first sequence which aren't in the second sequence, according to a given key selector.
|
|
var items2 = new[]
{
new { Id = 2, Name = "One" }
};
items.ExceptBy(items2, x => x.Id); // 1 3
items.ExceptBy(items2, x => x.Name); // 2 2
|
FallbackIfEmpty
Returns the elements of a sequence and falls back to another if the original sequence is empty.
|
|
var integers = Array.Empty<int>();
integers.FallbackIfEmpty(new[] { 1, 2 });
integers.FallbackIfEmpty(1); // int[] { 1 }
integers.FallbackIfEmpty(1, 2); // int[] { 1, 2 }
|
Left / Right / Full join
|
|
var a1 = new[] {1, 2, 3};
var a2 = new[] {1, 2, 4};
var lj = a1.LeftJoin(
a2,
x => x, // a1 key selector
x => x, // a2 key selector
x => (x, 0), // selector when a1 element doesn't match a2 element
(x, y) => (x, y)) // match selector
.ToArray();
// (1, 1) (2, 2) (3 ,0)
var fj = a1.FullJoin(
a2,
x => x, // a1 key selector
x => x, // a2 key selector
x => (x, 0), // selector when a1 element doesn't match a2 element
x => (0, x), // selector when a2 element doesn't match a1 element
(x, y) => (x, y)) // match selector
.ToArray();
// (1, 1) (2, 2) (3 ,0) (0, 4)
|
Ambiguous call between Linq.Enumerable.ToHashSet and MoreLinq.MoreEnumerable.ToHashSet
Workaround: move the MoreLinq using statement inside the namespace.
|
|
// using MoreLinq; namespace MyNamespace; using MoreLinq; |
