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System.CharEnumerator F# snippets (dotnet#7536)
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‎samples/snippets/fsharp/VS_Snippets_CLR_System/system.CharEnumerator.Class/fs/CharEnumerator1.fs‎

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open System
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let useCharEnumerator() =
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// <Snippet1>
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let title = "A Tale of Two Cities"
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let chEnum = title.GetEnumerator()
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printfn $"The length of the string is {title.Length} characters:"
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let mutable outputLine1 = ""
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let mutable outputLine2 = ""
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let mutable outputLine3 = ""
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let mutable i = 1
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while chEnum.MoveNext() do
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outputLine1 <- outputLine1 + if i < 10 || i % 10 <> 0 then " " else $"{i / 10} "
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outputLine2 <- outputLine2 + $"{i % 10} ";
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outputLine3 <- outputLine3 + $"{chEnum.Current} "
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i <- i + 1
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printfn "%s" outputLine1
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printfn "%s" outputLine2
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printfn "%s" outputLine3
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// The example displays the following output to the console:
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// The length of the string is 20 characters:
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// 1 2
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// 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0
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// A T a l e o f T w o C i t i e s
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// </Snippet1>
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let useForEach () =
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// <Snippet2>
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let title = "A Tale of Two Cities"
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let chEnum = title.GetEnumerator()
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printfn $"The length of the string is {title.Length} characters:"
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let mutable outputLine1 = ""
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let mutable outputLine2 = ""
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let mutable outputLine3 = ""
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let mutable i = 1
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for ch in title do
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outputLine1 <- outputLine1 + if i < 10 || i % 10 <> 0 then " " else $"{i / 10} "
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outputLine2 <- outputLine2 + $"{i % 10} ";
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outputLine3 <- outputLine3 + $"{ch} "
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i <- i + 1
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printfn "%s" outputLine1
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printfn "%s" outputLine2
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printfn "%s" outputLine3
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// The example displays the following output to the console:
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// The length of the string is 20 characters:
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// 1 2
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// 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0
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// A T a l e o f T w o C i t i e s
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// </Snippet2>
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useCharEnumerator ()
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printfn "-----"
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useForEach ()

‎samples/snippets/fsharp/VS_Snippets_CLR_System/system.CharEnumerator.Class/fs/fs.fsproj‎

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<OutputType>Exe</OutputType>
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<TargetFramework>net6.0</TargetFramework>
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</PropertyGroup>
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<ItemGroup>
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<Compile Include="CharEnumerator1.fs" />
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</ItemGroup>
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</Project>

‎xml/System/CharEnumerator.xml‎

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:::code language="cpp" source="~/samples/snippets/cpp/VS_Snippets_CLR_System/system.CharEnumerator.Class/cpp/charenumerator1.cpp" id="Snippet1":::
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:::code language="csharp" source="~/samples/snippets/csharp/VS_Snippets_CLR_System/system.CharEnumerator.Class/cs/CharEnumerator1.cs" id="Snippet1":::
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:::code language="fsharp" source="~/samples/snippets/fsharp/VS_Snippets_CLR_System/system.CharEnumerator.Class/fs/CharEnumerator1.fs" id="Snippet1":::
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:::code language="vb" source="~/samples/snippets/visualbasic/VS_Snippets_CLR_System/system.CharEnumerator.Class/vb/CharEnumerator1.vb" id="Snippet1":::
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Note, however, that the same operation can be performed somewhat more intuitively by using `foreach` (in C#) or `For Each` (in Visual Basic), as the following example shows.
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:::code language="cpp" source="~/samples/snippets/cpp/VS_Snippets_CLR_System/system.CharEnumerator.Class/cpp/charenumerator1.cpp" id="Snippet2":::
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:::code language="csharp" source="~/samples/snippets/csharp/VS_Snippets_CLR_System/system.CharEnumerator.Class/cs/CharEnumerator1.cs" id="Snippet2":::
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:::code language="fsharp" source="~/samples/snippets/fsharp/VS_Snippets_CLR_System/system.CharEnumerator.Class/fs/CharEnumerator1.fs" id="Snippet2":::
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:::code language="vb" source="~/samples/snippets/visualbasic/VS_Snippets_CLR_System/system.CharEnumerator.Class/vb/CharEnumerator1.vb" id="Snippet2":::
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]]></format>
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:::code language="cpp" source="~/samples/snippets/cpp/VS_Snippets_CLR_System/system.CharEnumerator.Class/cpp/charenumerator1.cpp" id="Snippet1":::
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:::code language="csharp" source="~/samples/snippets/csharp/VS_Snippets_CLR_System/system.CharEnumerator.Class/cs/CharEnumerator1.cs" id="Snippet1":::
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:::code language="fsharp" source="~/samples/snippets/fsharp/VS_Snippets_CLR_System/system.CharEnumerator.Class/fs/CharEnumerator1.fs" id="Snippet1":::
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:::code language="vb" source="~/samples/snippets/visualbasic/VS_Snippets_CLR_System/system.CharEnumerator.Class/vb/CharEnumerator1.vb" id="Snippet1":::
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Note, however, that the same operation can be performed somewhat more intuitively by using `foreach` (in C#) or `For Each` (in Visual Basic), as the following example shows.
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:::code language="cpp" source="~/samples/snippets/cpp/VS_Snippets_CLR_System/system.CharEnumerator.Class/cpp/charenumerator1.cpp" id="Snippet2":::
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:::code language="csharp" source="~/samples/snippets/csharp/VS_Snippets_CLR_System/system.CharEnumerator.Class/cs/CharEnumerator1.cs" id="Snippet2":::
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:::code language="fsharp" source="~/samples/snippets/fsharp/VS_Snippets_CLR_System/system.CharEnumerator.Class/fs/CharEnumerator1.fs" id="Snippet2":::
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:::code language="vb" source="~/samples/snippets/visualbasic/VS_Snippets_CLR_System/system.CharEnumerator.Class/vb/CharEnumerator1.vb" id="Snippet2":::
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]]></format>
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:::code language="cpp" source="~/samples/snippets/cpp/VS_Snippets_CLR_System/system.CharEnumerator.Class/cpp/charenumerator1.cpp" id="Snippet1":::
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:::code language="csharp" source="~/samples/snippets/csharp/VS_Snippets_CLR_System/system.CharEnumerator.Class/cs/CharEnumerator1.cs" id="Snippet1":::
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:::code language="fsharp" source="~/samples/snippets/fsharp/VS_Snippets_CLR_System/system.CharEnumerator.Class/fs/CharEnumerator1.fs" id="Snippet1":::
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:::code language="vb" source="~/samples/snippets/visualbasic/VS_Snippets_CLR_System/system.CharEnumerator.Class/vb/CharEnumerator1.vb" id="Snippet1":::
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Note, however, that the same operation can be performed somewhat more intuitively by using `foreach` (in C#) or `For Each` (in Visual Basic), as the following example shows.
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:::code language="cpp" source="~/samples/snippets/cpp/VS_Snippets_CLR_System/system.CharEnumerator.Class/cpp/charenumerator1.cpp" id="Snippet2":::
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:::code language="csharp" source="~/samples/snippets/csharp/VS_Snippets_CLR_System/system.CharEnumerator.Class/cs/CharEnumerator1.cs" id="Snippet2":::
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:::code language="fsharp" source="~/samples/snippets/fsharp/VS_Snippets_CLR_System/system.CharEnumerator.Class/fs/CharEnumerator1.fs" id="Snippet2":::
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:::code language="vb" source="~/samples/snippets/visualbasic/VS_Snippets_CLR_System/system.CharEnumerator.Class/vb/CharEnumerator1.vb" id="Snippet2":::
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]]></format>

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