内容简介：代码日志版权声明：翻译自：http://stackoverflow.com/questions/4880719/how-to-refactor-these-functions-which-have-one-line-difference
我有3个功能,其中唯一的区别是我指出的值与评论
//-- point of difference
所有这三个功能的大部分功能是一样的. “干”因素正在困扰我的睡眠:).我在想;这些可以容易地和可读地并入吗？
我以前有这样的情况,我希望在这里学习东西.
private string RenderRequestType(string render, NameValueCollection nvp, string prefix, string regexWild, string suffix)
{
string regex = prefix + regexWild + suffix;
MatchCollection matches = Regex.Matches(render, regex);
foreach (Match match in matches)
{
foreach (Capture capture in match.Captures)
{
string name = capture.Value.Replace(prefix, "", StringComparison.CurrentCultureIgnoreCase).Replace(suffix, "", StringComparison.CurrentCultureIgnoreCase);
//-- point of difference
string value = nvp[name];
render = render.Replace(capture.Value, value);
}
}
return render;
}
private string RenderSessionType(string render, HttpContext httpContext, string prefix, string regexWild, string suffix)
{
string regex = prefix + regexWild + suffix;
MatchCollection matches = Regex.Matches(render, regex);
foreach (Match match in matches)
{
foreach (Capture capture in match.Captures)
{
string name = capture.Value.Replace(prefix, "", StringComparison.CurrentCultureIgnoreCase).Replace(suffix, "", StringComparison.CurrentCultureIgnoreCase);
//-- point of difference
object session = httpContext.Session[name];
string value = (session != null ? session.ToString() : "");
render = render.Replace(capture.Value, value);
}
}
return render;
}
private string RenderCookieType(string render, HttpContext httpContext, string prefix, string regexWild, string suffix)
{
string regex = prefix + regexWild + suffix;
MatchCollection matches = Regex.Matches(render, regex);
foreach (Match match in matches)
{
foreach (Capture capture in match.Captures)
{
string name = capture.Value.Replace(prefix, "", StringComparison.CurrentCultureIgnoreCase).Replace(suffix, "", StringComparison.CurrentCultureIgnoreCase);
//-- point of difference
HttpCookie cookie = httpContext.Request.Cookies[name];
string value = (cookie != null ? cookie.Value : "");
render = render.Replace(capture.Value, value);
}
}
return render;
}
您可以修改函数以获取Func<
string,string>做查找：
private string RenderType(string render, Func<string, string> lookupFunc, string prefix, string regexWild, string suffix)
{
string regex = prefix + regexWild + suffix;
MatchCollection matches = Regex.Matches(render, regex);
foreach (Match match in matches)
{
foreach (Capture capture in match.Captures)
{
string name = capture.Value.Replace(prefix, "", StringComparison.CurrentCultureIgnoreCase).Replace(suffix, "", StringComparison.CurrentCultureIgnoreCase);
//-- point of difference
string value = lookupFunc(name);
render = render.Replace(capture.Value, value);
}
}
return render;
}
然后根据这个功能编写你的功能,例如：
private string RenderRequestType(string render, NameValueCollection nvp, string prefix, string regexWild, string suffix)
{
return RenderType(render, name => nvp[name], prefix, regexWild, suffix);
}
代码日志版权声明：
翻译自：http://stackoverflow.com/questions/4880719/how-to-refactor-these-functions-which-have-one-line-difference
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