■ StringBuilder 클래스에서 확장 기능을 사용하는 방법을 보여준다.
▶ 예제 코드 (C#)
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using System; using System.Collections.Generic; using System.Linq; using System.Text; /// <summary> /// 문자열 빌더 확장 /// </summary> public static class StringBuilderExtension { //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Static //////////////////////////////////////////////////////////////////////////////// Public #region 포맷 라인 추가하기 - AppendFormatLine(stringBuilder, format, argumentArray) /// <summary> /// 포맷 라인 추가하기 /// </summary> /// <param name="stringBuilder">문자열 빌더</param> /// <param name="format">포맷 문자열</param> /// <param name="argumentArray">인자 배열</param> /// <returns>문자열 빌더</returns> public static StringBuilder AppendFormatLine ( this StringBuilder stringBuilder, string format, params object[] argumentArray ) => stringBuilder.AppendFormat(format, argumentArray).AppendLine(); #endregion #region 특정 조건 해당시 추가하기 - AppendWhen(stringBuilder, predicateFunction, function) /// <summary> /// 특정 조건 해당시 추가하기 /// </summary> /// <param name="stringBuilder">문자열 빌더</param> /// <param name="predicateFunction">판정 함수</param> /// <param name="function">함수</param> /// <returns>문자열 빌더</returns> public static StringBuilder AppendWhen ( this StringBuilder stringBuilder, Func<bool> predicateFunction, Func<StringBuilder, StringBuilder> function ) => predicateFunction() ? function(stringBuilder) : stringBuilder; #endregion #region 열거 가능형 추가하기 - AppendEnumerable<T>(stringBuilder, sourceEnumerable, function) /// <summary> /// 열거 가능형 추가하기 /// </summary> /// <typeparam name="TItem">항목 타입</typeparam> /// <param name="stringBuilder">문자열 빌더</param> /// <param name="sourceEnumerable">소스 열거 가능형</param> /// <param name="function">누적 함수</param> /// <returns>문자열 빌더</returns> public static StringBuilder AppendEnumerable<TItem> ( this StringBuilder stringBuilder, IEnumerable<TItem> sourceEnumerable, Func<StringBuilder, TItem, StringBuilder> function ) => sourceEnumerable.Aggregate(stringBuilder, function); #endregion } |