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32 lines
852 B
C#
32 lines
852 B
C#
using System;
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using System.Diagnostics.Contracts;
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namespace DataStructures.Utils
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{
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public static class StringUtils
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{
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public static string CommonPrefix(this string str1, string str2)
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{
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Contract.Ensures(Contract.Result<string>() != null);
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return str1.Substring(0, str1.CommonPrefixLength(str2));
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}
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public static int CommonPrefixLength(this string str1, string str2)
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{
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Contract.Requires<ArgumentNullException>(str2 != null);
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Contract.Ensures(Contract.Result<int>() >= 0);
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int count = 0;
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for (int i = 0; i < str1.Length && i < str2.Length; i++, count++)
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{
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if (str1[i] != str2[i])
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{
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break;
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}
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}
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return count;
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}
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}
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}
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