質問編集履歴
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@@ -3,15 +3,19 @@
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どなたかご教授お願いします。
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9/10 20:42 コード修正しました。
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```C#
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using System.Collections.Generic;
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using System.Linq;
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7
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-
public class Base
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public class Base {
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public long Id { get; set; }
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public string Name { get; set; }
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public virtual IList<Sub> Subs { get; set; }
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}
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public class Sub
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public class Sub {
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public long Id { get; set; }
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public string Name { get; set; }
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public long BaseId { get; set; }
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@@ -19,17 +23,19 @@
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public virtual Base Base { get; set; }
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}
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public
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public class Test {
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public static void Main() {
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IList<Base> bases = new List<Base>() {
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new Base() { Id = 1, Name = "a", Subs = null },
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-
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new Base() { Id = 2, Name = "b", Subs = null }
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-
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};
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-
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// 平坦化するデータがない時はnullを返したい。
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-
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var bases2 = bases
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-
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.SelectMany(e => e.Subs.DefaultIfEmpty(), (e, e2) => e.Subs != null ? new {
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-
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Id = e.Id,
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-
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SubName = e2.Name
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-
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} : null);
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}
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}
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```
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@@ -20,7 +20,7 @@
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}
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public void Test() {
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IList<Base> = new List<Base>() {
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IList<Base> bases = new List<Base>() {
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new Base() { Id = 1, Name = "a", Subs = null },
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new Base() { Id = 2, Name = "b", Subs = null }
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};
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@@ -8,13 +8,15 @@
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public long Id { get; set; }
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public string Name { get; set; }
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public IList<Sub> Subs { get; set; }
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public virtual IList<Sub> Subs { get; set; }
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}
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public class Sub() {
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public long Id { get; set; }
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public string Name { get; set; }
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public long BaseId { get; set; }
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public virtual Base Base { get; set; }
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}
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public void Test() {
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title
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File without changes
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body
CHANGED
@@ -20,7 +20,7 @@
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public void Test() {
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IList<Base> = new List<Base>() {
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new Base() { Id = 1, Name = "a", Subs = null },
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new Base() { Id = 2, Name = "b", Subs = null }
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new Base() { Id = 2, Name = "b", Subs = null }
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};
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// 平坦化するデータがない時はnullを返したい。
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1
修正
title
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File without changes
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body
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@@ -27,7 +27,7 @@
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IList<Base> bases2 = bases
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.SelectMany(e => e.Subs.DefaultIfEmpty(), (e, e2) => e.Subs != null ? new Base() {
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Id = e.Id,
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SubName = e2.
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SubName = e2.Name
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} : null);
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}
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```
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