NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"(?<=title\\>).*(?=%@<-",result); } } NSPredicate测试: 其中自定义一个类,出事的时候给属性赋值,用runtime获取所有属性并重写description方法 @interface
Example of using metacharacters in a single-quoted string constant This example uses the backslash as part of an escape sequence in a regular expression that searches for a question mark (?). Create a table and insert a row that contains a single backslash in one column and a question mark...
to match any string that contains any characters that arenotthe letter A. To invoke a substring, use$n(0 <=n<= 9), wherenis the order of appearance of capture group in the regular expression, from left to right, from outside to inside, then from top to bottom. Should you use$0or/...
strObj.search(rgExp)Method. Returns the position of the first substring match in a regular expression search. strObj.split([separator[,limit]])Method. Returns the array of strings that results when a string is separated into substrings. Theseparatorparameter can contain either a separator symbol...
The regular expression contains the special characters (?C...) for callouts. The first three callouts pass numerical data, the other two pass string data. A local class ‘handle_regex’ implements the interface IF_ABAP_MATCHER_CALLOUT and an instance of that class is set as the callout ...
With a regular expression, we captureall words from a sentence. string pattern = @"\b(\w+\s*)+\." We use the + quantifier for the(+\s*) group. The group then contains all captures words of the sentence. foreach (Capture capture in match[i].Captures) { Console.WriteLine...
(If the replacement substring contains a dollar sign or backslash, then we also need to use Matcher.quoteReplacement(): see below.) Replacing substrings with a fixed stringIf you simply want to replace all instances of a given expression within a Java string with another fixed string, then ...
Next, find a substring at a specific position by using the syntax below. mysql> SELECT customer_id, first_name, last_name FROM customers WHERE first_name REGEXP '^..NE'; Output. +---+---+---+ | customer_id | first_name | last_name | +---+---+---+ | 1 | JANE | SMITH...
The regular expression\p{Sc}+\s*\d+that's used in this example verifies that the input string has a currency symbol and at least one decimal digit. The pattern is defined as shown in the following table: PatternDescription \p{Sc}+Matches one or more characters in the Unicode Symbol, Cu...
The Regex.Matches method is called with regular expression options set to RegexOptions.IgnoreCase. Therefore, the match operation is case-insensitive, and the example identifies the substring "This this" as a duplication. The input string includes the substring "this? This". However, because of th...