只能匹配汉字，数字，字母

for websites

num = num .replace(reg1, '') .replace(reg2, '') .replace(reg3, '$1_') .replace('.', '') .replace('_', '.');

Filtro para ubicar a los contactos de área de compras

This Regex has been tested against : 23px 3.32423423cm .87687533mm 34223423em...

Matches strings in the ISO_8601 format. Named capture groups for year, month, date, hours, minutes, seconds, ms and timezone offset.

Matches: 1.0 .01 1e-10 1.0e3 0.2e10