Record it:
/ ^ (??? ^ - [12] [0-9] | - 30 | - [0-9]) $ /
self-test Haoshi
Regular matching number between -30 and 30
Guess you like
Origin www.cnblogs.com/fmixue/p/12083388.html
Ranking
Record it:
/ ^ (??? ^ - [12] [0-9] | - 30 | - [0-9]) $ /
self-test Haoshi