^asserts position at start of the string {matches the character{with index12310(7B16or1738) literally (case sensitive) Match a single character present in the list below [a-zA-Z0-9_\.\,] +matches the previous token betweenoneandunlimitedtimes, as many times as possible, giving back as nee...
您正在寻找一个https://www.regular-expressions.info/branchreset.html，其中捕获组的编号从组之前的最后...
public string[] Split (string input, int count, int startat); Parameters input String The string to be split. count Int32 The maximum number of times the split can occur. startat Int32 The character position in the input string where the search will begin. Returns String[] An arra...
startIndex = regexp(str,expression) 返回与正则表达式指定的字符模式匹配的每个str子字符串的起始索引。如果没有匹配,startIndex就是一个空数组。 [startIndex,endIndex] = regexp(str,expression) 返回起始索引和结束索引。 out = regexp(str,expression,outkey) 返回由outkey指定的输出。例如,如果outkey是'mat...
如需startat的詳細資訊,請參閱 Match(String, Int32)的一節。 正則表達式是由目前 Regex 物件的建構函式所定義的模式。 evaluator 參數是您定義之自定義方法的委派,且會檢查每個相符專案。 自定義方法必須具有下列簽章,才能符合 MatchEvaluator 委派。 C# 複製 public string MatchEvaluatorMethod(Match match) 您...
\b Start or end of a word \w matches any letter, digit and underscore character \s matches a whitespace character — that is, a space or tab From what mentioned above, we can write regular expressions like this: \w{5} matches any five-letter word or a five-digit number. a{5} will...
\A Start of string \b Match empty string at word (\w+) boundary \B Match empty string not at word boundary \d Digit \D Non-digit \s Whitespace [ \t\n\r\f\v], see LOCALE,UNICODE \S Non-whitespace \w Alphanumeric: [0-9a-zA-Z_], see LOCALE \W Non-alphanumeric \Z End of...
In general, the caret symbol represents the start of the string, but when it is typed after the opening square bracket it negates the character set. For example, the regular expression [^c]ar means: any character except c, followed by the character a, followed by the letter r. "[^c]...
relative to the start ofinput. This means that any anchors or zero-width assertions at the start or end of the pattern behave as if there is noinputoutside of this range. For example the anchors^,\G, and\Awill be satisfied atbeginningand$and\zwill be satisfied atbeginning + length -...
如需startat的詳細資訊,請參閱 Match(String, Int32)的一節。 正則表達式是由目前 Regex 物件的建構函式所定義的模式。 evaluator 參數是您定義之自定義方法的委派,且會檢查每個相符專案。 自定義方法必須具有下列簽章,才能符合 MatchEvaluator 委派。 C# 複製 public string MatchEvaluatorMethod(Match match) 您...