var str="good wood food foot green glass roof";
var reg=/(.)\1/g
console.log( str.match(reg))
Ответ:
[ 'oo', 'oo', 'oo', 'oo', 'ee', 'ss', 'oo' ]
JavaScript test | #JavaScript
JA JavaScript test @js_test · 9.67K subscribers var str="good wood food foot green glass roof";
var reg=/(.)\1/g
console.log( str.match(reg))