JS string to remove consecutive or all repeating characters

JS string to remove consecutive repeating characters

() and \number are used to denote duplicates in the regular number of parentheses, such as: (\d) \1 means repeating the first matching block (\d) is equivalent to if (\d) match to A, the expression is AA

The corresponding can: (some) \1* or (some) \1+ or (some) \1? Represents repeating the first match to get the content any time or at least once or 0 times

1        vars = "1122333455";2 3        varS1 =s;4        varC;5        varCC = S.match (/(\d) \1+/g);//11,22,333,55 of course here () \1* is also possible (because the following is a replacement): 11,22,333,4,556         for(vari = 0;i<cc.length;i++){7 8c = cc[i].substring (0,1);9S1 =S1.replace (cc[i],c);Ten  One        } A  -alert (S1); 12345

JS string to remove all repeating characters and sort the final string

1         vars = "1234321ABACCC";2         varS1 = S.split (""). Sort (). Join ("");3         varCC = S1.match (/(.) \1+/G);//11,22,33,AA,CCC of course here () \1* is also possible (because the following is a replacement): 11,22,33,4,AA,B,CCC4          for(vari = 0;i<cc.length;i++){5 6c = cc[i].substring (0,1);7S1 =S1.replace (cc[i],c);8 9        }Ten  Onealert (S1);//1234ABC

JS string to remove consecutive or all repeating characters