^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...
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,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'match',那么regexp将返回与表达式匹配的子字符串,而不是它们的起始索引。 [out1,...,outN] = regexp(str,expression,outkey1,...,outkeyN...
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]armeans: any character exceptc, followed by the charactera, followed by the letterr. ...
startat Int32 搜索开始的输入字符串中的字符位置。 返回 String 与输入字符串完全相同的新字符串,但替换字符串取代每个匹配字符串的位置。 如果在当前实例中不匹配正则表达式模式,该方法将返回当前实例不变。 例外 ArgumentNullException input 或evaluatornull。 ArgumentOutOfRangeException startat 小于零或大于 ...
startat Int32 The zero-based character position at which to start the search. Returns Boolean trueif the regular expression finds a match; otherwise,false. Exceptions RegexMatchTimeoutException A time-out occurred. Applies to .NET 9 and other versions ...
startat Int32 The zero-based character position at which to start the search. Returns Boolean trueif the regular expression finds a match; otherwise,false. Exceptions RegexMatchTimeoutException A time-out occurred. Applies to .NET 9 and other versions ...
startatis less than zero or greater than the length ofinput. Examples The following example uses theMatch(String)method to find the first word in a sentence that ends in "es", and then calls theMatches(String, Int32)method to identify any additional words that end in "es". ...
startat Int32 搜索开始的输入字符串中的字符位置。 返回 String 与输入字符串完全相同的新字符串,但替换字符串取代每个匹配字符串的位置。 如果在当前实例中不匹配正则表达式模式,该方法将返回当前实例不变。 例外 ArgumentNullException input 或evaluatornull。 ArgumentOutOfRangeException startat 小于零或大于 ...
\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...