常见javascriprt正则表达式匹配

reg = /((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)/g

0\d{2}-\d{8}|0\d{3}-\d{7}

(139|131|138|188|159)\d{8}

reg = /^([a-z0-9_\.-]+)@([\da-z\.-]+)\.([a-z\.]{2,6})$/g

[1-9][0-9]{4,}