我正在尝试编写一个正则表达式来匹配以下内容:
must start with a letter
the rest must be alphanumeric
at least one character in length
max characters 12
我应该能匹配吗
a
k2jdj
hello
example72812
我正在尝试编写一个正则表达式来匹配以下内容:
must start with a letter
the rest must be alphanumeric
at least one character in length
max characters 12
我应该能匹配吗
a
k2jdj
hello
example72812