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Merge pull request #797 from Humanizr/pr/712-sort-ignoring-article-pr…
…efixes-fixes-694 Rebase of #712
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,23 @@ | ||
| using System; | ||
| using Xunit; | ||
|
|
||
| namespace Humanizer.Tests | ||
| { | ||
| public class ArticlePrefixSortTests | ||
| { | ||
| [Theory] | ||
| [InlineData(new[] { "Ant", "The Theater", "The apple", "Fox", "Bear" }, new[] { "Ant", "The apple", "Bear", "Fox", "The Theater" })] | ||
| public void SortStringArrayIgnoringArticlePrefixes(string[] input, string[] expectedOutput) | ||
| { | ||
| Assert.Equal(expectedOutput, EnglishArticle.PrependArticleSuffix(EnglishArticle.AppendArticlePrefix(input))); | ||
| } | ||
|
|
||
| [Fact] | ||
| public void An_Empty_String_Array_Throws_ArgumentOutOfRangeException() | ||
| { | ||
| string[] items = { }; | ||
| void action() => EnglishArticle.AppendArticlePrefix(items); | ||
| Assert.Throws<ArgumentOutOfRangeException>(action); | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,108 @@ | ||
| using System; | ||
| using System.Text.RegularExpressions; | ||
|
|
||
| namespace Humanizer | ||
| { | ||
| /// <summary> | ||
| /// Contains methods for removing, appending and prepending article prefixes for sorting strings ignoring the article. | ||
| /// </summary> | ||
| public static class EnglishArticle | ||
| { | ||
| /// <summary> | ||
| /// Removes the prefixed article and appends it to the same string. | ||
| /// </summary> | ||
| /// <param name="items">The input array of strings</param> | ||
| /// <returns>Sorted string array</returns> | ||
| public static string[] AppendArticlePrefix(string[] items) | ||
| { | ||
| if (items.Length == 0) | ||
| { | ||
| throw new ArgumentOutOfRangeException(nameof(items)); | ||
| } | ||
|
|
||
| var regex = new Regex("^((The)|(the)|(a)|(A)|(An)|(an))\\s\\w+"); | ||
| var transformed = new string[items.Length]; | ||
|
|
||
| for (var i = 0; i < items.Length; i++) | ||
| { | ||
| if (regex.IsMatch(items[i])) | ||
| { | ||
| var article = items[i].Substring(0, items[i].IndexOf(" ", StringComparison.CurrentCulture)); | ||
| var removed = items[i].Remove(0, items[i].IndexOf(" ", StringComparison.CurrentCulture)); | ||
| var appended = $"{removed} {article}"; | ||
| transformed[i] = appended.Trim(); | ||
| } | ||
| else | ||
| { | ||
| transformed[i] = items[i].Trim(); | ||
| } | ||
| } | ||
| Array.Sort(transformed); | ||
| return transformed; | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// Removes the previously appended article and prepends it to the same string. | ||
| /// </summary> | ||
| /// <param name="appended">Sorted string array</param> | ||
| /// <returns>String array</returns> | ||
| public static string[] PrependArticleSuffix(string[] appended) | ||
| { | ||
| var inserted = new string[appended.Length]; | ||
|
|
||
| for (var i = 0; i < appended.Length; i++) | ||
| { | ||
| string suffix; | ||
| string original; | ||
| if (appended[i].EndsWith(EnglishArticles.The.ToString())) | ||
| { | ||
| suffix = appended[i].Substring(appended[i].IndexOf(" The", StringComparison.CurrentCulture)); | ||
| original = ToOriginalFormat(appended, suffix, i); | ||
| inserted[i] = original; | ||
| } | ||
| else if (appended[i].EndsWith(EnglishArticles.A.ToString())) | ||
| { | ||
| suffix = appended[i].Substring(appended[i].IndexOf(" A", StringComparison.CurrentCulture)); | ||
| original = ToOriginalFormat(appended, suffix, i); | ||
| inserted[i] = original; | ||
| } | ||
| else if (appended[i].EndsWith(EnglishArticles.An.ToString())) | ||
| { | ||
| suffix = appended[i].Substring(appended[i].IndexOf(" An", StringComparison.CurrentCulture)); | ||
| original = ToOriginalFormat(appended, suffix, i); | ||
| inserted[i] = original; | ||
| } | ||
| else if (appended[i].EndsWith(EnglishArticles.A.ToString().ToLowerInvariant())) | ||
| { | ||
| suffix = appended[i].Substring(appended[i].IndexOf(" a", StringComparison.CurrentCulture)); | ||
| original = ToOriginalFormat(appended, suffix, i); | ||
| inserted[i] = original; | ||
| } | ||
| else if (appended[i].EndsWith(EnglishArticles.An.ToString().ToLowerInvariant())) | ||
| { | ||
| suffix = appended[i].Substring(appended[i].IndexOf(" an", StringComparison.CurrentCulture)); | ||
| original = ToOriginalFormat(appended, suffix, i); | ||
| inserted[i] = original; | ||
| } | ||
| else if (appended[i].EndsWith(EnglishArticles.The.ToString().ToLowerInvariant())) | ||
| { | ||
| suffix = appended[i].Substring(appended[i].IndexOf(" the", StringComparison.CurrentCulture)); | ||
| original = ToOriginalFormat(appended, suffix, i); | ||
| inserted[i] = original; | ||
| } | ||
| else | ||
| { | ||
| inserted[i] = appended[i]; | ||
| } | ||
| } | ||
| return inserted; | ||
| } | ||
|
|
||
| private static string ToOriginalFormat(string[] appended, string suffix, int i) | ||
| { | ||
| var insertion = appended[i].Remove(appended[i].IndexOf(suffix, StringComparison.CurrentCulture)); | ||
| var original = $"{suffix} {insertion}"; | ||
| return original.Trim(); | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,21 @@ | ||
| namespace Humanizer | ||
| { | ||
| /// <summary> | ||
| /// Definite and Indefinite English Articles | ||
| /// </summary> | ||
| public enum EnglishArticles | ||
| { | ||
| /// <summary> | ||
| /// A | ||
| /// </summary> | ||
| A, | ||
| /// <summary> | ||
| /// An | ||
| /// </summary> | ||
| An, | ||
| /// <summary> | ||
| /// The | ||
| /// </summary> | ||
| The | ||
| } | ||
| } |
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