RegExp.prototype.generator = function(string, submatch=null) {
 var regexp = new RegExp(this.source, 'g')
 return function *f() {
  var match = null
  while(match = regexp.exec(string)) {
   if(submatch === null)
    yield match
   else if(match.length <= submatch )
    throw('number of submatches does not match param submatch')
   else
    yield match[submatch]
  }
  return
 }()
}

RegExp.prototype.execArray = function(string, submatch) {
 return [...this.generator(string, submatch)]
}

String.prototype.matchArray = function(regExpAsString, submatch) {
    return (new RegExp(regExpAsString)).execArray(this, submatch)
}


var foo = "'str1', 'str2', 'str3'"
var r = new RegExp(/\'([^'])+\'/)

foo.matchArray(r, 1)
foo.matchArray(/\'([^'])+\'/, 1)
r.execArray(foo, 1)

>>> ["str1", "str2", "str3"]