38 lines
1.5 KiB
C#
38 lines
1.5 KiB
C#
#nullable enable
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using System;
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namespace MediaBrowser.Common.Extensions
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{
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/// <summary>
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/// Extensions methods to simplify string operations.
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/// </summary>
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public static class StringExtensions
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{
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/// <summary>
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/// Returns the part on the left of the <c>needle</c>.
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/// </summary>
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/// <param name="haystack">The string to seek.</param>
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/// <param name="needle">The needle to find.</param>
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/// <returns>The part left of the <paramref name="needle" />.</returns>
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public static ReadOnlySpan<char> LeftPart(this ReadOnlySpan<char> haystack, char needle)
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{
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var pos = haystack.IndexOf(needle);
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return pos == -1 ? haystack : haystack[..pos];
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}
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/// <summary>
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/// Returns the part on the left of the <c>needle</c>.
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/// </summary>
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/// <param name="haystack">The string to seek.</param>
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/// <param name="needle">The needle to find.</param>
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/// <param name="stringComparison">One of the enumeration values that specifies the rules for the search.</param>
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/// <returns>The part left of the <c>needle</c>.</returns>
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public static ReadOnlySpan<char> LeftPart(this ReadOnlySpan<char> haystack, ReadOnlySpan<char> needle, StringComparison stringComparison = default)
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{
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var pos = haystack.IndexOf(needle, stringComparison);
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return pos == -1 ? haystack : haystack[..pos];
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}
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}
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}
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