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Solution # 2 - My attempt to remove the two if #8

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Solution # 2 - My attempt to remove the two if #8

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37 changes: 16 additions & 21 deletions dotnet/src/SinglePath/FieldsToFetch.cs
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Original file line number Diff line number Diff line change
@@ -1,23 +1,25 @@
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Collections.Generic;

namespace SinglePath
{
public class FieldsToFetch
{
private HashSet<string> ensuredFieldNames;
private readonly HashSet<string> fieldsToFetch;
private readonly HashSet<string> _ensuredFieldNames;
private readonly HashSet<string> _fieldsToFetch;

public IEnumerable<string> Fields
public FieldsToFetch()
{
_fieldsToFetch = new HashSet<string>();
_ensuredFieldNames = new HashSet<string>();
}

public IEnumerable<string> Fields
{
get
{
HashSet<string> fieldsWeMustReturn = ensuredFieldNames == null
? new HashSet<string>()
: new HashSet<string>(ensuredFieldNames);
foreach (var fieldToReturn in GetFieldsToReturn())
HashSet<string> fieldsWeMustReturn = new HashSet<string>(_ensuredFieldNames);

foreach (var fieldToReturn in GetFieldsToReturn())
{
fieldsWeMustReturn.Remove(fieldToReturn);
yield return fieldToReturn;
Expand All @@ -32,19 +34,12 @@ public IEnumerable<string> Fields

private IEnumerable<string> GetFieldsToReturn()
{
if (fieldsToFetch == null)
yield break;
foreach (var field in fieldsToFetch)
{
yield return field;
}
return _fieldsToFetch;
}

public void EnsureHasField(string ensuredFieldName)
public void EnsureHasField(string ensuredFieldName)
{
if (ensuredFieldNames == null)
ensuredFieldNames = new HashSet<string>();
ensuredFieldNames.Add(ensuredFieldName);
_ensuredFieldNames.Add(ensuredFieldName);
}
}
}