WAR_VIK

let print = s => console.log(s);
let str = 'word.wor6d_word.word-a';
let res = str.replace(/.+\./g, '');
print(res);

let print = s => console.log(s);
let str = '111,222;333 444';
let arr = str.match(/\d+/g);
print(arr);

let print = s => console.log(s);
let str = 'http://link.com/youtube/channel/UCanMSlq9In5E1jLt-pObIAw/otherchans/subscriber/featured';
let res = str.match(/\/channel\/\w+\S?\w+/)[0];
print(res);