初学,\b不会用,网上说的意思是匹配一个单词边界,单词边界指\W,本身不显示;比如说:\ba 匹配 "@@@abc" 结果a,理解,因为a前面有个单词边界;
\ba 匹配 "abc" 结果a,字符串前面有默认边界是吗?
\b. 匹配 ",@abc,@abc@,abc" 结果依次:"a" "," " a" " @" "a";
.\b 匹配 ",@abc,@abc@,abc" 结果依次:"@" "c" " @" " c" "," "c";这个怎么看的?看不明白?
\ba 匹配 "abc" 结果a,字符串前面有默认边界是吗?
\b. 匹配 ",@abc,@abc@,abc" 结果依次:"a" "," " a" " @" "a";
.\b 匹配 ",@abc,@abc@,abc" 结果依次:"@" "c" " @" " c" "," "c";这个怎么看的?看不明白?
“,@abc,@abc@,abc”
匹配的分割模式是:,@abc ,@ abc @, abc.\b是匹配字符串的第一个字母之前的那个单词
“,@abc,@abc@,abc”
匹配的分割模式是: ,@abc ,@ abc @, abc,@是特殊字符,不是标准的字符串