Add SepReaderHeader.TryIndexOf

nietras · Jul 11, 2024 · f0702b9 · f0702b9
1 parent 0abb208
commit f0702b9
Show file tree

Hide file tree

Showing 2 changed files with 9 additions and 0 deletions.
diff --git a/src/Sep.Test/SepReaderHeaderTest.cs b/src/Sep.Test/SepReaderHeaderTest.cs
@@ -45,6 +45,13 @@ public void SepReaderHeaderTest_NotEmpty()
  AreEqual([0, 2], header.IndicesOf((ReadOnlySpan<string>)["A", "C"]));
  AreEqual([2, 0], header.IndicesOf((IReadOnlyList<string>)["C", "A"]));
 
+ var tryTrue = header.TryIndexOf("B", out var tryTrueIndex);
+ Assert.IsTrue(tryTrue);
+ Assert.AreEqual(1, tryTrueIndex);
+ var tryFalse = header.TryIndexOf("XX", out var tryFalseIndex);
+ Assert.IsFalse(tryFalse);
+ Assert.AreEqual(0, tryFalseIndex);
+
  var actualIndices = new int[2];
  header.IndicesOf((ReadOnlySpan<string>)["A", "C"], actualIndices);
  AreEqual([0, 2], actualIndices);

diff --git a/src/Sep/SepReaderHeader.cs b/src/Sep/SepReaderHeader.cs
@@ -41,6 +41,8 @@ internal static SepReaderHeader Parse(Sep sep, string line, IEqualityComparer<st
 
  public int IndexOf(string colName) => _colNameToIndex[colName];
 
+ public bool TryIndexOf(string colName, out int colIndex) => _colNameToIndex.TryGetValue(colName, out colIndex);
+
  public IReadOnlyList<string> NamesStartingWith(string prefix, StringComparison comparison = StringComparison.Ordinal)
  {
  var colNames = new List<string>();