string s = "你好"; QString qs(s.data()); cout << string(qs.toLocal8Bit()) << endl; 1. 2. 3. 上面的代码中s中的内容是经过UTF-8编码的字符串,调用其data()方法获取到了原始的字节数据,并构造成了QString,然后调用QString对象的toLocal8Bit方法转换为windows系
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
Although re includes module-level functions for working with regular expressions as text strings, it is more efficient to compile the expressions a program uses frequently. The compile() function converts an expression string into a RegexObject. re_simple_compiled.py import re # Precompile the pa...
n\w*'is an example of a regular expression. It defines a pattern that starts with the lettersJo, is optionally followed by the letterh(indicated by'h?'), is then followed by the lettern, and ends with any number ofword characters, that is, characters that are alphabetic, numeric, or ...
Any other character appearing in a regular expression is ordinary, unless a\precedes it. Special characters serve a special purpose. For instance, the.matches anything except a new line. A regular expression likes.nmatches any three-character string that begins withsand ends withn, includingsunand...
When filtering conditions are set to query output information, the first line of the command output starts with the entire regular expression but not the string to be filtered. The system allows you to use | count to display the number of lines, | section to display the command output by ...
re:The regular expression object.匹配时使用的Pattern对象。 regs: string:The string passed to match() or search().匹配时使用的文本。 方法: end(self, group=0, /) Return index of the end of the substring matched by group. 返回指定的组截获的子串在string中的结束索引(子串最后一个字符的索引+...
\z End of the entire string. \Z End of the entire string except allowable final line terminator. re* Matches 0 or more occurrences of the preceding expression. re+ Matches 1 or more of the previous thing. re? Matches 0 or 1 occurrence of the preceding expression. re{ n} Matches...
The expression that the flag modifies can appear either after the parentheses, such as (?i)\w* or inside the parentheses and separated from the flag with a colon (:), such as (?i:\w*) The latter syntax allows you to change the behavior for part of a larger expression. ...
\Zin the regular expression^((\w+(\s?)){2,}),\s(\w+\s\w+),(\s\d{4}(-(\d{4}|present))?,?)+\r?\Zis satisfied at the end of a string, and also at the end of a string that ends with\nor\r\n. As a result, each element in the array matches the regular expression...