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Added new LINQ method - ReplaceMultiple
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Krzysztof Dobrzyński
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Oct 31, 2017
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,25 @@ | ||
| using System.Collections.Generic; | ||
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| namespace KD.Linq | ||
| { | ||
| /// <summary> | ||
| /// Class used when replacement is needed. | ||
| /// </summary> | ||
| public abstract class ReplaceIterator<TValue> : ByIndexIterator<TValue> | ||
| { | ||
| /// <summary> | ||
| /// New value for which the selected one will be replaced. | ||
| /// </summary> | ||
| public TValue NewValue { get; } | ||
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| public ReplaceIterator(IEnumerable<TValue> source, int index, TValue newValue) : | ||
| base(source, index) | ||
| { | ||
| this.NewValue = newValue; | ||
| } | ||
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| public override abstract void OnWantedIndexHit(); | ||
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| public override abstract void OnWrongIndexHit(); | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,40 @@ | ||
| using System; | ||
| using System.Collections.Generic; | ||
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| namespace KD.Linq | ||
| { | ||
| internal class ReplaceMultipleIterator<TValue> : ReplaceIterator<TValue> | ||
| { | ||
| public Func<TValue, bool> Selector { get; } | ||
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| public ReplaceMultipleIterator(IEnumerable<TValue> source, TValue newValue, Func<TValue, bool> selector) : | ||
| base(source, -1, newValue) // -1 will prevent from any hit | ||
| { | ||
| this.Selector = selector; | ||
| } | ||
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| /// <summary> | ||
| /// This should never be hit. | ||
| /// </summary> | ||
| public override void OnWantedIndexHit() | ||
| { | ||
| throw new NotImplementedException(); | ||
| } | ||
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| /// <summary> | ||
| /// All logic should be here. | ||
| /// </summary> | ||
| public override void OnWrongIndexHit() | ||
| { | ||
| var canReplace = this.Selector(this.Enumerator.Current); | ||
| if (this.Selector != null && canReplace) | ||
| { | ||
| this.Current = this.NewValue; | ||
| } | ||
| else | ||
| { | ||
| this.Current = this.Enumerator.Current; | ||
| } | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,28 @@ | ||
| using KD.Linq; | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
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| namespace Test_ReplaceAt | ||
| { | ||
| class Program | ||
| { | ||
| static void Main(string[] args) | ||
| { | ||
| var list = new List<int>() { 1, 2, 1, 3, 1, 4 }; | ||
| list.ForEach(value => Console.Write(value + ", ")); | ||
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| Console.WriteLine(); | ||
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| var list2 = list.ReplaceAt(1, 9).ToList(); | ||
| list2.ForEach(value => Console.Write(value + ", ")); | ||
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| Console.WriteLine(); | ||
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| var list3 = list2.ReplaceAt(2, 7).ToList(); | ||
| list3.ForEach(value => Console.Write(value + ", ")); | ||
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| Console.ReadKey(); | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,30 @@ | ||
| using KD.Linq; | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
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| namespace Test_ReplaceMultiple | ||
| { | ||
| class Program | ||
| { | ||
| static void Main(string[] args) | ||
| { | ||
| var list = new List<int>() { 1, 2, 1, 3, 1, 4 }; | ||
| list.ForEach(value => Console.Write(value + ", ")); | ||
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| Console.WriteLine(); | ||
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| // Replace value at each index where value equals 1 to new value which is 9 | ||
| var list2 = list.ReplaceMultiple(9, value => value == 1).ToList(); | ||
| list2.ForEach(value => Console.Write(value + ", ")); | ||
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| Console.WriteLine(); | ||
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| // Replace value at each index where value equals 2 to new value which is 8 | ||
| var list3 = list2.ReplaceMultiple(8, value => value == 2).ToList(); | ||
| list3.ForEach(value => Console.Write(value + ", ")); | ||
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| Console.ReadKey(); | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,12 @@ | ||
| <Project Sdk="Microsoft.NET.Sdk"> | ||
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| <PropertyGroup> | ||
| <OutputType>Exe</OutputType> | ||
| <TargetFramework>netcoreapp2.0</TargetFramework> | ||
| </PropertyGroup> | ||
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| <ItemGroup> | ||
| <ProjectReference Include="..\KD.Linq\KD.Linq.csproj" /> | ||
| </ItemGroup> | ||
|
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| </Project> |
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