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pangram: fix all-contains-case-insensitive sample code #2184

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Oct 3, 2023
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pangram: fix all-contains-case-insensitive sample code #2184

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7 changes: 4 additions & 3 deletions exercises/practice/pangram/.approaches/all-contains-case-insensitive/content.md
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Original file line number Diff line number Diff line change
@@ -1,12 +1,13 @@
# `All` with `Contains` using case-insensitive comparison

```csharp
using System;
using System.Linq;

public static class Pangram
{
private static readonly StringComparison xcase = StringComparison.CurrentCultureIgnoreCase;

public static bool IsPangram(string input)
{
return "abcdefghijklmnopqrstuvwxyz".All(c => input.Contains(c, xcase));
Expand All @@ -16,9 +17,9 @@ public static class Pangram

- This begins by setting a variable for a case-insensitive `string` comparison.
- It then checks if all letters in the alphabet are contained in the input,
using the [LINQ][linq] method [`All`][all] with the `String` method [`Contains`][contains].
using the [LINQ][linq] method [`All`][all] with the `String` method [`Contains`][contains].
- `Contains` takes the optional [`StringComparison`][stringcomparison] argument,
but a case-insensitive comparison is about seven times slower than if the input were lowercased and then an exact comparison were done.
but a case-insensitive comparison is about seven times slower than if the input were lowercased and then an exact comparison were done.

## Shortening

Expand Down