本文整理汇总了C#中Slice.GroupBy方法的典型用法代码示例。如果您正苦于以下问题：C# Slice.GroupBy方法的具体用法？C# Slice.GroupBy怎么用？C# Slice.GroupBy使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Slice的用法示例。
在下文中一共展示了Slice.GroupBy方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: OptimizedRegexInner
private static string OptimizedRegexInner(Slice<string> strings, string openParen)
{
var closeParen = openParen.PythonAnd(")").PythonOr("");
if (strings.Length == 0)
return "";
var first = strings[0];
if (strings.Length == 1)
return openParen + Escape(first) + closeParen;
if (string.IsNullOrEmpty(first))
{
//first string empty
return openParen + OptimizedRegexInner(strings.SubSlice(1), "(?:") +
"?" + closeParen;
}
if (first.Length == 1)
{
//multiple one-char strings? make a charset
StringBuilder oneletter = new StringBuilder();
List<string> rest = new List<string>();
foreach (var s in strings)
{
if (s.Length == 1)
oneletter.Append(s);
else
{
rest.Add(s);
}
}
if (oneletter.Length > 1) // do we have more than one oneletter string?
{
if (rest.Count > 0)
{
// 1-character + rest
return openParen + OptimizedRegexInner(rest.ToArray(), "") +
"|" + MakeCharset(oneletter.ToString()) + closeParen;
}
return MakeCharset(oneletter.ToString());
}
}
var prefix = CommonPrefix.Of(strings);
if (prefix.Length > 0)
{
var plen = prefix.Length;
// we have a prefix for all strings
// print '-> prefix:', prefix
return openParen + Escape(prefix)
+ OptimizedRegexInner(strings.Select(s => s.Substring(plen)).ToArray(), "(?:")
+ closeParen;
}
// is there a suffix?
var stringsReversed = strings.Select(s => s.Backwards()).ToArray();
var suffix = CommonPrefix.Of(stringsReversed);
if (suffix.Length > 0)
{
var slen = suffix.Length;
return openParen
+ OptimizedRegexInner(strings.Select(s => s.Substring(s.Length - slen)).ToArray(), "(?:")
+ Escape(suffix.Backwards()) + closeParen;
}
//# recurse on common 1-string prefixes
//# print '-> last resort'
var groups = strings.GroupBy(s => s[0] == first[0]);
return openParen +
string.Join("|", groups.Select(g => OptimizedRegexInner(g.ToArray(), ""))) +
closeParen;
}