javascript - Regex match conditional but dont return it -

here trying clear on regexes. i've created regex:

a.match( /(@|#)(.*?)(\s|$|\:)/g ) 

it matches users , hastags in tweet. problem return condition( @|#) , (\s|$|\:)

is possible not returning them?

i'm using javascript

var ='rt @olmjanssen: met #fbkgames en @jmvanhalst volop in voorbereiding: 6 juni seminar kwaliteitsborging van #sportaccommodatie bij regiseerende gemeente' a.match( /(@|#)(.*?)(\s|$|\:)/g ) //returns ["@olmjanssen:", "#fbkgames ", "@jmvanhalst ", "#sportaccommodatie "] 

how about:

a.match(/[@#](\s+)(?:\s|:|$)/g) 

explanation:

the regular expression:  (?-imsx:[@#](\s+)(?:\s|:|$))  matches follows:  node                     explanation ---------------------------------------------------------------------- (?-imsx:                 group, not capture (case-sensitive)                          (with ^ , $ matching normally) (with . not                          matching \n) (matching whitespace , #                          normally): ----------------------------------------------------------------------   [@#]                     character of: '@', '#' ----------------------------------------------------------------------   (                        group , capture \1: ----------------------------------------------------------------------     \s+                      non-whitespace (all \n, \r, \t, \f,                              , " ") (1 or more times (matching                              amount possible)) ----------------------------------------------------------------------   )                        end of \1 ----------------------------------------------------------------------   (?:                      group, not capture: ----------------------------------------------------------------------     \s                       whitespace (\n, \r, \t, \f, , " ") ----------------------------------------------------------------------    |                        or ----------------------------------------------------------------------     :                        ':' ----------------------------------------------------------------------    |                        or ----------------------------------------------------------------------     $                        before optional \n, , end of                              string ----------------------------------------------------------------------   )                        end of grouping ---------------------------------------------------------------------- )                        end of grouping ----------------------------------------------------------------------