JavaScript正则表达式-字符类

字符列表

在方括号内指定一个或者多个字符组成的字符列表，与字符列表中任意字符匹配，都被认为是匹配的。每次匹配只能匹配列表中的一个字符。

str = "bird,head,fed,meadow,3d";

reg_pattern = /[rea3s]d/g;

arr_m = str.match(reg_pattern);//arr_m = ["rd","ad","ed","ad","3d"]

str = "bird,head,*d,meadow,3d";

reg_pattern = /[\*ea]d/g;

arr_m = str.match(reg_pattern);//arr_m = ["ad","*d","ad"]

反向列表

匹配列表中指定字符以外的所有字符

反向列表通过在列表前加"^"符号进行定义

str = "bird,head,*d,meadow,3d";

reg_pattern = /[^fa3]d/g;

arr_m = str.match(reg_pattern);//arr_m = ["rd","*d"]

字符范围

用"-"符号将起始字符与结束字符连接起来，表示起始字符与结束字符之间所有字符。

str = "Great hope make great man!";

reg_pattern = /[a-z]a/g;

arr_m = str.match(reg_pattern);//arr_m = ["ea","ma","ea","ma"]

反向范围

在字符范围前加上"^"符号，表示匹配该字符范围以外任意字符

组合类

多种字符可以混合使用

str = "Hi!bit this biscuit";

reg_pattern = /[E-Kj-ms-zb0-9]i/g;

arr_m = str.match(reg_pattern);//arr_m = ["Hi","bi","bi","ui"]

预定义类