{"action":"created","issue":{"url":"https://api.github.com/repos/ReactiveX/RxJS/issues/868","labels_url":"https://api.github.com/repos/ReactiveX/RxJS/issues/868/labels{/name}","comments_url":"https://api.github.com/repos/ReactiveX/RxJS/issues/868/comments","events_url":"https://api.github.com/repos/ReactiveX/RxJS/issues/868/events","html_url":"https://github.com/ReactiveX/RxJS/issues/868","id":120098711,"number":868,"title":"Expose concurrency parameter of mergeScan","user":{"login":"kwonoj","id":1210596,"avatar_url":"https://avatars.githubusercontent.com/u/1210596?v=3","gravatar_id":"","url":"https://api.github.com/users/kwonoj","html_url":"https://github.com/kwonoj","followers_url":"https://api.github.com/users/kwonoj/followers","following_url":"https://api.github.com/users/kwonoj/following{/other_user}","gists_url":"https://api.github.com/users/kwonoj/gists{/gist_id}","starred_url":"https://api.github.com/users/kwonoj/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/kwonoj/subscriptions","organizations_url":"https://api.github.com/users/kwonoj/orgs","repos_url":"https://api.github.com/users/kwonoj/repos","events_url":"https://api.github.com/users/kwonoj/events{/privacy}","received_events_url":"https://api.github.com/users/kwonoj/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":5,"created_at":"2015-12-03T05:44:01Z","updated_at":"2015-12-03T19:00:55Z","closed_at":null,"body":"While `MergeScanOperator` has implementation to accept concurrency parameter\r\n\r\n```js\r\nconstructor(private project: (acc: R, x: T) => Observable<R>,\r\n              private seed: R,\r\n              private concurrent: number = Number.POSITIVE_INFINITY)\r\n```\r\n\r\ntype definition of `mergeScan` does not allow to use it.\r\n\r\n`mergeScan<T, R>(project: (acc: R, x: T) => Observable<R>, seed: R)`.\r\n\r\nWould it be better to expose concurrency parameter?"},"comment":{"url":"https://api.github.com/repos/ReactiveX/RxJS/issues/comments/161747982","html_url":"https://github.com/ReactiveX/RxJS/issues/868#issuecomment-161747982","issue_url":"https://api.github.com/repos/ReactiveX/RxJS/issues/868","id":161747982,"user":{"login":"kwonoj","id":1210596,"avatar_url":"https://avatars.githubusercontent.com/u/1210596?v=3","gravatar_id":"","url":"https://api.github.com/users/kwonoj","html_url":"https://github.com/kwonoj","followers_url":"https://api.github.com/users/kwonoj/followers","following_url":"https://api.github.com/users/kwonoj/following{/other_user}","gists_url":"https://api.github.com/users/kwonoj/gists{/gist_id}","starred_url":"https://api.github.com/users/kwonoj/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/kwonoj/subscriptions","organizations_url":"https://api.github.com/users/kwonoj/orgs","repos_url":"https://api.github.com/users/kwonoj/repos","events_url":"https://api.github.com/users/kwonoj/events{/privacy}","received_events_url":"https://api.github.com/users/kwonoj/received_events","type":"User","site_admin":false},"created_at":"2015-12-03T19:00:55Z","updated_at":"2015-12-03T19:00:55Z","body":"> definitely looking at the concurrent value \r\n\r\n: Yes, that's part where I started this issue. I'll think bit more to bring up some code snippets if possible."}}