Reputation: 35

Parse all JSON object with same id value

I got this JSON response:

{"beatmapset_id":"971561","beatmap_id":"2034200","approved":"3","total_length":"196","hit_length":"186","version":"Easy","file_md5":"9c8eb80f6e245b5b0a0a100bbb3e274c","diff_size":"4","diff_overall":"7","diff_approach":"5","diff_drain":"7","mode":"3","submit_date":"2019-05-14 12:01:13","approved_date":"2019-05-22 15:49:35","last_update":"2019-05-22 11:51:06","artist":"antiPLUR","title":"Runengon","creator":"Raveille","creator_id":"1388767","bpm":"174","source":"osu!","tags":"featured artist lenfried- famoss mappers' guild fa chiptune 8bit aaron dictor electronic","genre_id":"1","language_id":"1","favourite_count":"1","rating":"0","playcount":"0","passcount":"0","max_combo":null,"diff_aim":null,"diff_speed":null,"difficultyrating":"1.2615262269973755"},{"beatmapset_id":"971561","beatmap_id":"2034201","approved":"3","total_length":"196","hit_length":"196","version":"Hard","file_md5":"b5fbe1a1444e35ecb7f8f03e2b61986b","diff_size":"4","diff_overall":"8","diff_approach":"5","diff_drain":"8","mode":"3","submit_date":"2019-05-14 12:01:13","approved_date":"2019-05-22 15:49:35","last_update":"2019-05-22 11:51:06","artist":"antiPLUR","title":"Runengon","creator":"Raveille","creator_id":"1388767","bpm":"174","source":"osu!","tags":"featured artist lenfried- famoss mappers' guild fa chiptune 8bit aaron dictor electronic","genre_id":"1","language_id":"1","favourite_count":"1","rating":"0","playcount":"27","passcount":"9","max_combo":null,"diff_aim":null,"diff_speed":null,"difficultyrating":"3.590883255004883"},{"beatmapset_id":"971561","beatmap_id":"2034202","approved":"3","total_length":"196","hit_length":"196","version":"Normal","file_md5":"f7f23e1073b508593d98cb50097b0d7e","diff_size":"4","diff_overall":"7.5","diff_approach":"5","diff_drain":"7.5","mode":"3","submit_date":"2019-05-14 12:01:13","approved_date":"2019-05-22 15:49:35","last_update":"2019-05-22 11:51:06","artist":"antiPLUR","title":"Runengon","creator":"Raveille","creator_id":"1388767","bpm":"174","source":"osu!","tags":"featured artist lenfried- famoss mappers' guild fa chiptune 8bit aaron dictor electronic","genre_id":"1","language_id":"1","favourite_count":"1","rating":"0","playcount":"0","passcount":"0","max_combo":null,"diff_aim":null,"diff_speed":null,"difficultyrating":"2.367466926574707"},{"beatmapset_id":"971561","beatmap_id":"2039384","approved":"3","total_length":"196","hit_length":"189","version":"Lenfried's Insane","file_md5":"de4b9a01bf44a847b7cebb96da623ccf","diff_size":"4","diff_overall":"8.5","diff_approach":"5","diff_drain":"8.5","mode":"3","submit_date":"2019-05-14 12:01:13","approved_date":"2019-05-22 15:49:35","last_update":"2019-05-22 11:51:06","artist":"antiPLUR","title":"Runengon","creator":"Raveille","creator_id":"1388767","bpm":"174","source":"osu!","tags":"featured artist lenfried- famoss mappers' guild fa chiptune 8bit aaron dictor electronic","genre_id":"1","language_id":"1","favourite_count":"1","rating":"0","playcount":"9","passcount":"0","max_combo":null,"diff_aim":null,"diff_speed":null,"difficultyrating":"4.318020820617676"},{"beatmapset_id":"747507","beatmap_id":"1575098","approved":"3","total_length":"199","hit_length":"183","version":"Collab Hard","file_md5":"bc4b04103cd263b039fc8349420493a7","diff_size":"3.8","diff_overall":"6","diff_approach":"7.5","diff_drain":"5","mode":"0","submit_date":"2018-03-11 14:14:22","approved_date":"2019-05-22 16:36:04","last_update":"2019-05-21 12:48:00","artist":"senya","title":"Terasareru kurai no Shiawase","creator":"Satellite","creator_id":"1661227","bpm":"160","source":"\u6771\u65b9Project","tags":"\u5e7d\u9589\u30b5\u30c6\u30e9\u30a4\u30c8 touhou sellenite dailycare -mo- shirasaka_koume voyage 1969 \u6771\u65b9\u6c38\u591c\u6284 imperishable night stage 6 theme \u304b\u307e\u305b\u864e kamasetora \u795e\u5948\u68ee\u30e6\u30a6 hizumi \u96f6\u308c\u305a\u306e\u9858\u3044\u30b4\u30c8 koborezu no negai goto dagger-gazel yuuhei","genre_id":"1","language_id":"1","favourite_count":"11","rating":"0","playcount":"0","passcount":"0","max_combo":"839","diff_aim":"1.5965542793273926","diff_speed":"1.6582205295562744","difficultyrating":"3.2856078147888184"},{"beatmapset_id":"747507","beatmap_id":"1575099","approved":"3","total_length":"199","hit_length":"182","version":"Koume's Lunatic","file_md5":"7851625279d6e841ef810ced825d8f5a","diff_size":"3.8","diff_overall":"8","diff_approach":"9","diff_drain":"5.5","mode":"0","submit_date":"2018-03-11 14:14:22","approved_date":"2019-05-22 16:36:04","last_update":"2019-05-21 12:48:00","artist":"senya","title":"Terasareru kurai no Shiawase","creator":"Satellite","creator_id":"1661227","bpm":"160","source":"\u6771\u65b9Project","tags":"\u5e7d\u9589\u30b5\u30c6\u30e9\u30a4\u30c8 touhou sellenite dailycare -mo- shirasaka_koume voyage 1969 \u6771\u65b9\u6c38\u591c\u6284 imperishable night stage 6 theme \u304b\u307e\u305b\u864e kamasetora \u795e\u5948\u68ee\u30e6\u30a6 hizumi \u96f6\u308c\u305a\u306e\u9858\u3044\u30b4\u30c8 koborezu no negai goto dagger-gazel yuuhei","genre_id":"1","language_id":"1","favourite_count":"11","rating":"0","playcount":"0","passcount":"0","max_combo":"1022","diff_aim":"2.5197982788085938","diff_speed":"2.2990376949310303","difficultyrating":"4.929216384887695"},{"beatmapset_id":"747507","beatmap_id":"1575100","approved":"3","total_length":"199","hit_length":"197","version":"Mo's Lunatic","file_md5":"9572a8b9f12005624ac623f889f5faba","diff_size":"4.2","diff_overall":"7.6","diff_approach":"8.8","diff_drain":"6","mode":"0","submit_date":"2018-03-11 14:14:22","approved_date":"2019-05-22 16:36:04","last_update":"2019-05-21 12:48:00","artist":"senya","title":"Terasareru kurai no Shiawase","creator":"Satellite","creator_id":"1661227","bpm":"160","source":"\u6771\u65b9Project","tags":"\u5e7d\u9589\u30b5\u30c6\u30e9\u30a4\u30c8 touhou sellenite dailycare -mo- shirasaka_koume voyage 1969 \u6771\u65b9\u6c38\u591c\u6284 imperishable night stage 6 theme \u304b\u307e\u305b\u864e kamasetora \u795e\u5948\u68ee\u30e6\u30a6 hizumi \u96f6\u308c\u305a\u306e\u9858\u3044\u30b4\u30c8 koborezu no negai goto dagger-gazel yuuhei","genre_id":"1","language_id":"1","favourite_count":"11","rating":"0","playcount":"0","passcount":"0","max_combo":"1108","diff_aim":"2.3829450607299805","diff_speed":"2.201321601867676","difficultyrating":"4.675078392028809"},{"beatmapset_id":"747507","beatmap_id":"1575101","approved":"3","total_length":"199","hit_length":"182","version":"Satellite","file_md5":"db69457a6d3eda63c9de4af73c556bee","diff_size":"4","diff_overall":"8.4","diff_approach":"9.2","diff_drain":"6.2","mode":"0","submit_date":"2018-03-11 14:14:22","approved_date":"2019-05-22 16:36:04","last_update":"2019-05-21 12:48:00","artist":"senya","title":"Terasareru kurai no Shiawase","creator":"Satellite","creator_id":"1661227","bpm":"160","source":"\u6771\u65b9Project","tags":"\u5e7d\u9589\u30b5\u30c6\u30e9\u30a4\u30c8 touhou sellenite dailycare -mo- shirasaka_koume voyage 1969 \u6771\u65b9\u6c38\u591c\u6284 imperishable night stage 6 theme \u304b\u307e\u305b\u864e kamasetora \u795e\u5948\u68ee\u30e6\u30a6 hizumi \u96f6\u308c\u305a\u306e\u9858\u3044\u30b4\u30c8 koborezu no negai goto dagger-gazel yuuhei","genre_id":"1","language_id":"1","favourite_count":"11","rating":"0","playcount":"0","passcount":"0","max_combo":"1138","diff_aim":"2.7451868057250977","diff_speed":"2.3703885078430176","difficultyrating":"5.302974224090576"},{"beatmapset_id":"747507","beatmap_id":"1643432","approved":"3","total_length":"199","hit_length":"183","version":"Sellenite's Normal","file_md5":"2f143083aa9bc12f94318d467a2cdd41","diff_size":"3.5","diff_overall":"4","diff_approach":"5.5","diff_drain":"4","mode":"0","submit_date":"2018-03-11 14:14:22","approved_date":"2019-05-22 16:36:04","last_update":"2019-05-21 12:48:00","artist":"senya","title":"Terasareru kurai no Shiawase","creator":"Satellite","creator_id":"1661227","bpm":"160","source":"\u6771\u65b9Project","tags":"\u5e7d\u9589\u30b5\u30c6\u30e9\u30a4\u30c8 touhou sellenite dailycare -mo- shirasaka_koume voyage 1969 \u6771\u65b9\u6c38\u591c\u6284 imperishable night stage 6 theme \u304b\u307e\u305b\u864e kamasetora \u795e\u5948\u68ee\u30e6\u30a6 hizumi \u96f6\u308c\u305a\u306e\u9858\u3044\u30b4\u30c8 koborezu no negai goto dagger-gazel yuuhei","genre_id":"1","language_id":"1","favourite_count":"11","rating":"0","playcount":"0","passcount":"0","max_combo":"584","diff_aim":"1.1335170269012451","diff_speed":"1.0233529806137085","difficultyrating":"2.211951971054077"},{"beatmapset_id":"747507","beatmap_id":"1659358","approved":"3","total_length":"199","hit_length":"173","version":"Easy","file_md5":"5ede8b76217cbf0e22980e990905181d","diff_size":"3","diff_overall":"2","diff_approach":"3","diff_drain":"2","mode":"0","submit_date":"2018-03-11 14:14:22","approved_date":"2019-05-22 16:36:04","last_update":"2019-05-21 12:48:00","artist":"senya","title":"Terasareru kurai no Shiawase","creator":"Satellite","creator_id":"1661227","bpm":"160","source":"\u6771\u65b9Project","tags":"\u5e7d\u9589\u30b5\u30c6\u30e9\u30a4\u30c8 touhou sellenite dailycare -mo- shirasaka_koume voyage 1969 \u6771\u65b9\u6c38\u591c\u6284 imperishable night stage 6 theme \u304b\u307e\u305b\u864e kamasetora \u795e\u5948\u68ee\u30e6\u30a6 hizumi \u96f6\u308c\u305a\u306e\u9858\u3044\u30b4\u30c8 koborezu no negai goto dagger-gazel yuuhei","genre_id":"1","language_id":"1","favourite_count":"11","rating":"0","playcount":"0","passcount":"0","max_combo":"483","diff_aim":"1.0374764204025269","diff_speed":"0.9278122186660767","difficultyrating":"2.020120620727539"}]

I want to parse all "difficultyrating" from all objects with same beatmapset_id value and put it into array. How can I do that? I did that to parse only last element from JSON:

var latestBeatmap = JSON.stringify(resp[resp.length - 1]);
var parsed = JSON.parse(latestBeatmap);

Upvotes: 0

Answers (3)

Bibberty

Reputation: 4768

We can use Set and map to do this:

const beatMapToDifficulty = [...new Set(beatmapResp.map(b =>b.beatmapset_id))]
            .map(bm => ({
               beatmapset_id: bm, 
               difficultyratings: beatmapResp.filter(br => br.beatmapset_id === bm)
                                             .map(b => b.difficultyrating)
               }));

console.log(beatMapToDifficulty);

Below is working snippet of this code.

const beatmapResp = [{
  "beatmapset_id": "971561",
  "beatmap_id": "2034200",
  "approved": "3",
  "total_length": "196",
  "hit_length": "186",
  "version": "Easy",
  "file_md5": "9c8eb80f6e245b5b0a0a100bbb3e274c",
  "diff_size": "4",
  "diff_overall": "7",
  "diff_approach": "5",
  "diff_drain": "7",
  "mode": "3",
  "submit_date": "2019-05-14 12:01:13",
  "approved_date": "2019-05-22 15:49:35",
  "last_update": "2019-05-22 11:51:06",
  "artist": "antiPLUR",
  "title": "Runengon",
  "creator": "Raveille",
  "creator_id": "1388767",
  "bpm": "174",
  "source": "osu!",
  "tags": "featured artist lenfried- famoss mappers' guild fa chiptune 8bit aaron dictor electronic",
  "genre_id": "1",
  "language_id": "1",
  "favourite_count": "1",
  "rating": "0",
  "playcount": "0",
  "passcount": "0",
  "max_combo": null,
  "diff_aim": null,
  "diff_speed": null,
  "difficultyrating": "1.2615262269973755"
}, {
  "beatmapset_id": "971561",
  "beatmap_id": "2034201",
  "approved": "3",
  "total_length": "196",
  "hit_length": "196",
  "version": "Hard",
  "file_md5": "b5fbe1a1444e35ecb7f8f03e2b61986b",
  "diff_size": "4",
  "diff_overall": "8",
  "diff_approach": "5",
  "diff_drain": "8",
  "mode": "3",
  "submit_date": "2019-05-14 12:01:13",
  "approved_date": "2019-05-22 15:49:35",
  "last_update": "2019-05-22 11:51:06",
  "artist": "antiPLUR",
  "title": "Runengon",
  "creator": "Raveille",
  "creator_id": "1388767",
  "bpm": "174",
  "source": "osu!",
  "tags": "featured artist lenfried- famoss mappers' guild fa chiptune 8bit aaron dictor electronic",
  "genre_id": "1",
  "language_id": "1",
  "favourite_count": "1",
  "rating": "0",
  "playcount": "27",
  "passcount": "9",
  "max_combo": null,
  "diff_aim": null,
  "diff_speed": null,
  "difficultyrating": "3.590883255004883"
}, {
  "beatmapset_id": "971561",
  "beatmap_id": "2034202",
  "approved": "3",
  "total_length": "196",
  "hit_length": "196",
  "version": "Normal",
  "file_md5": "f7f23e1073b508593d98cb50097b0d7e",
  "diff_size": "4",
  "diff_overall": "7.5",
  "diff_approach": "5",
  "diff_drain": "7.5",
  "mode": "3",
  "submit_date": "2019-05-14 12:01:13",
  "approved_date": "2019-05-22 15:49:35",
  "last_update": "2019-05-22 11:51:06",
  "artist": "antiPLUR",
  "title": "Runengon",
  "creator": "Raveille",
  "creator_id": "1388767",
  "bpm": "174",
  "source": "osu!",
  "tags": "featured artist lenfried- famoss mappers' guild fa chiptune 8bit aaron dictor electronic",
  "genre_id": "1",
  "language_id": "1",
  "favourite_count": "1",
  "rating": "0",
  "playcount": "0",
  "passcount": "0",
  "max_combo": null,
  "diff_aim": null,
  "diff_speed": null,
  "difficultyrating": "2.367466926574707"
}, {
  "beatmapset_id": "971561",
  "beatmap_id": "2039384",
  "approved": "3",
  "total_length": "196",
  "hit_length": "189",
  "version": "Lenfried's Insane",
  "file_md5": "de4b9a01bf44a847b7cebb96da623ccf",
  "diff_size": "4",
  "diff_overall": "8.5",
  "diff_approach": "5",
  "diff_drain": "8.5",
  "mode": "3",
  "submit_date": "2019-05-14 12:01:13",
  "approved_date": "2019-05-22 15:49:35",
  "last_update": "2019-05-22 11:51:06",
  "artist": "antiPLUR",
  "title": "Runengon",
  "creator": "Raveille",
  "creator_id": "1388767",
  "bpm": "174",
  "source": "osu!",
  "tags": "featured artist lenfried- famoss mappers' guild fa chiptune 8bit aaron dictor electronic",
  "genre_id": "1",
  "language_id": "1",
  "favourite_count": "1",
  "rating": "0",
  "playcount": "9",
  "passcount": "0",
  "max_combo": null,
  "diff_aim": null,
  "diff_speed": null,
  "difficultyrating": "4.318020820617676"
}, {
  "beatmapset_id": "747507",
  "beatmap_id": "1575098",
  "approved": "3",
  "total_length": "199",
  "hit_length": "183",
  "version": "Collab Hard",
  "file_md5": "bc4b04103cd263b039fc8349420493a7",
  "diff_size": "3.8",
  "diff_overall": "6",
  "diff_approach": "7.5",
  "diff_drain": "5",
  "mode": "0",
  "submit_date": "2018-03-11 14:14:22",
  "approved_date": "2019-05-22 16:36:04",
  "last_update": "2019-05-21 12:48:00",
  "artist": "senya",
  "title": "Terasareru kurai no Shiawase",
  "creator": "Satellite",
  "creator_id": "1661227",
  "bpm": "160",
  "source": "\u6771\u65b9Project",
  "tags": "\u5e7d\u9589\u30b5\u30c6\u30e9\u30a4\u30c8 touhou sellenite dailycare -mo- shirasaka_koume voyage 1969 \u6771\u65b9\u6c38\u591c\u6284 imperishable night stage 6 theme \u304b\u307e\u305b\u864e kamasetora \u795e\u5948\u68ee\u30e6\u30a6 hizumi \u96f6\u308c\u305a\u306e\u9858\u3044\u30b4\u30c8 koborezu no negai goto dagger-gazel yuuhei",
  "genre_id": "1",
  "language_id": "1",
  "favourite_count": "11",
  "rating": "0",
  "playcount": "0",
  "passcount": "0",
  "max_combo": "839",
  "diff_aim": "1.5965542793273926",
  "diff_speed": "1.6582205295562744",
  "difficultyrating": "3.2856078147888184"
}, {
  "beatmapset_id": "747507",
  "beatmap_id": "1575099",
  "approved": "3",
  "total_length": "199",
  "hit_length": "182",
  "version": "Koume's Lunatic",
  "file_md5": "7851625279d6e841ef810ced825d8f5a",
  "diff_size": "3.8",
  "diff_overall": "8",
  "diff_approach": "9",
  "diff_drain": "5.5",
  "mode": "0",
  "submit_date": "2018-03-11 14:14:22",
  "approved_date": "2019-05-22 16:36:04",
  "last_update": "2019-05-21 12:48:00",
  "artist": "senya",
  "title": "Terasareru kurai no Shiawase",
  "creator": "Satellite",
  "creator_id": "1661227",
  "bpm": "160",
  "source": "\u6771\u65b9Project",
  "tags": "\u5e7d\u9589\u30b5\u30c6\u30e9\u30a4\u30c8 touhou sellenite dailycare -mo- shirasaka_koume voyage 1969 \u6771\u65b9\u6c38\u591c\u6284 imperishable night stage 6 theme \u304b\u307e\u305b\u864e kamasetora \u795e\u5948\u68ee\u30e6\u30a6 hizumi \u96f6\u308c\u305a\u306e\u9858\u3044\u30b4\u30c8 koborezu no negai goto dagger-gazel yuuhei",
  "genre_id": "1",
  "language_id": "1",
  "favourite_count": "11",
  "rating": "0",
  "playcount": "0",
  "passcount": "0",
  "max_combo": "1022",
  "diff_aim": "2.5197982788085938",
  "diff_speed": "2.2990376949310303",
  "difficultyrating": "4.929216384887695"
}, {
  "beatmapset_id": "747507",
  "beatmap_id": "1575100",
  "approved": "3",
  "total_length": "199",
  "hit_length": "197",
  "version": "Mo's Lunatic",
  "file_md5": "9572a8b9f12005624ac623f889f5faba",
  "diff_size": "4.2",
  "diff_overall": "7.6",
  "diff_approach": "8.8",
  "diff_drain": "6",
  "mode": "0",
  "submit_date": "2018-03-11 14:14:22",
  "approved_date": "2019-05-22 16:36:04",
  "last_update": "2019-05-21 12:48:00",
  "artist": "senya",
  "title": "Terasareru kurai no Shiawase",
  "creator": "Satellite",
  "creator_id": "1661227",
  "bpm": "160",
  "source": "\u6771\u65b9Project",
  "tags": "\u5e7d\u9589\u30b5\u30c6\u30e9\u30a4\u30c8 touhou sellenite dailycare -mo- shirasaka_koume voyage 1969 \u6771\u65b9\u6c38\u591c\u6284 imperishable night stage 6 theme \u304b\u307e\u305b\u864e kamasetora \u795e\u5948\u68ee\u30e6\u30a6 hizumi \u96f6\u308c\u305a\u306e\u9858\u3044\u30b4\u30c8 koborezu no negai goto dagger-gazel yuuhei",
  "genre_id": "1",
  "language_id": "1",
  "favourite_count": "11",
  "rating": "0",
  "playcount": "0",
  "passcount": "0",
  "max_combo": "1108",
  "diff_aim": "2.3829450607299805",
  "diff_speed": "2.201321601867676",
  "difficultyrating": "4.675078392028809"
}, {
  "beatmapset_id": "747507",
  "beatmap_id": "1575101",
  "approved": "3",
  "total_length": "199",
  "hit_length": "182",
  "version": "Satellite",
  "file_md5": "db69457a6d3eda63c9de4af73c556bee",
  "diff_size": "4",
  "diff_overall": "8.4",
  "diff_approach": "9.2",
  "diff_drain": "6.2",
  "mode": "0",
  "submit_date": "2018-03-11 14:14:22",
  "approved_date": "2019-05-22 16:36:04",
  "last_update": "2019-05-21 12:48:00",
  "artist": "senya",
  "title": "Terasareru kurai no Shiawase",
  "creator": "Satellite",
  "creator_id": "1661227",
  "bpm": "160",
  "source": "\u6771\u65b9Project",
  "tags": "\u5e7d\u9589\u30b5\u30c6\u30e9\u30a4\u30c8 touhou sellenite dailycare -mo- shirasaka_koume voyage 1969 \u6771\u65b9\u6c38\u591c\u6284 imperishable night stage 6 theme \u304b\u307e\u305b\u864e kamasetora \u795e\u5948\u68ee\u30e6\u30a6 hizumi \u96f6\u308c\u305a\u306e\u9858\u3044\u30b4\u30c8 koborezu no negai goto dagger-gazel yuuhei",
  "genre_id": "1",
  "language_id": "1",
  "favourite_count": "11",
  "rating": "0",
  "playcount": "0",
  "passcount": "0",
  "max_combo": "1138",
  "diff_aim": "2.7451868057250977",
  "diff_speed": "2.3703885078430176",
  "difficultyrating": "5.302974224090576"
}, {
  "beatmapset_id": "747507",
  "beatmap_id": "1643432",
  "approved": "3",
  "total_length": "199",
  "hit_length": "183",
  "version": "Sellenite's Normal",
  "file_md5": "2f143083aa9bc12f94318d467a2cdd41",
  "diff_size": "3.5",
  "diff_overall": "4",
  "diff_approach": "5.5",
  "diff_drain": "4",
  "mode": "0",
  "submit_date": "2018-03-11 14:14:22",
  "approved_date": "2019-05-22 16:36:04",
  "last_update": "2019-05-21 12:48:00",
  "artist": "senya",
  "title": "Terasareru kurai no Shiawase",
  "creator": "Satellite",
  "creator_id": "1661227",
  "bpm": "160",
  "source": "\u6771\u65b9Project",
  "tags": "\u5e7d\u9589\u30b5\u30c6\u30e9\u30a4\u30c8 touhou sellenite dailycare -mo- shirasaka_koume voyage 1969 \u6771\u65b9\u6c38\u591c\u6284 imperishable night stage 6 theme \u304b\u307e\u305b\u864e kamasetora \u795e\u5948\u68ee\u30e6\u30a6 hizumi \u96f6\u308c\u305a\u306e\u9858\u3044\u30b4\u30c8 koborezu no negai goto dagger-gazel yuuhei",
  "genre_id": "1",
  "language_id": "1",
  "favourite_count": "11",
  "rating": "0",
  "playcount": "0",
  "passcount": "0",
  "max_combo": "584",
  "diff_aim": "1.1335170269012451",
  "diff_speed": "1.0233529806137085",
  "difficultyrating": "2.211951971054077"
}, {
  "beatmapset_id": "747507",
  "beatmap_id": "1659358",
  "approved": "3",
  "total_length": "199",
  "hit_length": "173",
  "version": "Easy",
  "file_md5": "5ede8b76217cbf0e22980e990905181d",
  "diff_size": "3",
  "diff_overall": "2",
  "diff_approach": "3",
  "diff_drain": "2",
  "mode": "0",
  "submit_date": "2018-03-11 14:14:22",
  "approved_date": "2019-05-22 16:36:04",
  "last_update": "2019-05-21 12:48:00",
  "artist": "senya",
  "title": "Terasareru kurai no Shiawase",
  "creator": "Satellite",
  "creator_id": "1661227",
  "bpm": "160",
  "source": "\u6771\u65b9Project",
  "tags": "\u5e7d\u9589\u30b5\u30c6\u30e9\u30a4\u30c8 touhou sellenite dailycare -mo- shirasaka_koume voyage 1969 \u6771\u65b9\u6c38\u591c\u6284 imperishable night stage 6 theme \u304b\u307e\u305b\u864e kamasetora \u795e\u5948\u68ee\u30e6\u30a6 hizumi \u96f6\u308c\u305a\u306e\u9858\u3044\u30b4\u30c8 koborezu no negai goto dagger-gazel yuuhei",
  "genre_id": "1",
  "language_id": "1",
  "favourite_count": "11",
  "rating": "0",
  "playcount": "0",
  "passcount": "0",
  "max_combo": "483",
  "diff_aim": "1.0374764204025269",
  "diff_speed": "0.9278122186660767",
  "difficultyrating": "2.020120620727539"
}];

const beatMapToDifficulty = [...new Set(beatmapResp.map(b =>b.beatmapset_id))]
                .map(bm => ({
                   beatmapset_id: bm, 
                   difficultyratings: beatmapResp.filter(br => br.beatmapset_id === bm)
                                                 .map(b => b.difficultyrating)
                   }));
                            
console.log(beatMapToDifficulty);

To get just the last difficulty and not all:

We use reverse

    const beatMapToDifficulty = [...new Set(beatmapResp.map(b =>b.beatmapset_id))]
            .map(bm => ({
               beatmapset_id: bm, 
               difficultyratings: beatmapResp.reverse().find(br => 
                                  br.beatmapset_id === bm).difficultyrating

               }));

Here is a working snippet:

const beatmapResp = [{
  "beatmapset_id": "971561",
  "beatmap_id": "2034200",
  "approved": "3",
  "total_length": "196",
  "hit_length": "186",
  "version": "Easy",
  "file_md5": "9c8eb80f6e245b5b0a0a100bbb3e274c",
  "diff_size": "4",
  "diff_overall": "7",
  "diff_approach": "5",
  "diff_drain": "7",
  "mode": "3",
  "submit_date": "2019-05-14 12:01:13",
  "approved_date": "2019-05-22 15:49:35",
  "last_update": "2019-05-22 11:51:06",
  "artist": "antiPLUR",
  "title": "Runengon",
  "creator": "Raveille",
  "creator_id": "1388767",
  "bpm": "174",
  "source": "osu!",
  "tags": "featured artist lenfried- famoss mappers' guild fa chiptune 8bit aaron dictor electronic",
  "genre_id": "1",
  "language_id": "1",
  "favourite_count": "1",
  "rating": "0",
  "playcount": "0",
  "passcount": "0",
  "max_combo": null,
  "diff_aim": null,
  "diff_speed": null,
  "difficultyrating": "1.2615262269973755"
}, {
  "beatmapset_id": "971561",
  "beatmap_id": "2034201",
  "approved": "3",
  "total_length": "196",
  "hit_length": "196",
  "version": "Hard",
  "file_md5": "b5fbe1a1444e35ecb7f8f03e2b61986b",
  "diff_size": "4",
  "diff_overall": "8",
  "diff_approach": "5",
  "diff_drain": "8",
  "mode": "3",
  "submit_date": "2019-05-14 12:01:13",
  "approved_date": "2019-05-22 15:49:35",
  "last_update": "2019-05-22 11:51:06",
  "artist": "antiPLUR",
  "title": "Runengon",
  "creator": "Raveille",
  "creator_id": "1388767",
  "bpm": "174",
  "source": "osu!",
  "tags": "featured artist lenfried- famoss mappers' guild fa chiptune 8bit aaron dictor electronic",
  "genre_id": "1",
  "language_id": "1",
  "favourite_count": "1",
  "rating": "0",
  "playcount": "27",
  "passcount": "9",
  "max_combo": null,
  "diff_aim": null,
  "diff_speed": null,
  "difficultyrating": "3.590883255004883"
}, {
  "beatmapset_id": "971561",
  "beatmap_id": "2034202",
  "approved": "3",
  "total_length": "196",
  "hit_length": "196",
  "version": "Normal",
  "file_md5": "f7f23e1073b508593d98cb50097b0d7e",
  "diff_size": "4",
  "diff_overall": "7.5",
  "diff_approach": "5",
  "diff_drain": "7.5",
  "mode": "3",
  "submit_date": "2019-05-14 12:01:13",
  "approved_date": "2019-05-22 15:49:35",
  "last_update": "2019-05-22 11:51:06",
  "artist": "antiPLUR",
  "title": "Runengon",
  "creator": "Raveille",
  "creator_id": "1388767",
  "bpm": "174",
  "source": "osu!",
  "tags": "featured artist lenfried- famoss mappers' guild fa chiptune 8bit aaron dictor electronic",
  "genre_id": "1",
  "language_id": "1",
  "favourite_count": "1",
  "rating": "0",
  "playcount": "0",
  "passcount": "0",
  "max_combo": null,
  "diff_aim": null,
  "diff_speed": null,
  "difficultyrating": "2.367466926574707"
}, {
  "beatmapset_id": "971561",
  "beatmap_id": "2039384",
  "approved": "3",
  "total_length": "196",
  "hit_length": "189",
  "version": "Lenfried's Insane",
  "file_md5": "de4b9a01bf44a847b7cebb96da623ccf",
  "diff_size": "4",
  "diff_overall": "8.5",
  "diff_approach": "5",
  "diff_drain": "8.5",
  "mode": "3",
  "submit_date": "2019-05-14 12:01:13",
  "approved_date": "2019-05-22 15:49:35",
  "last_update": "2019-05-22 11:51:06",
  "artist": "antiPLUR",
  "title": "Runengon",
  "creator": "Raveille",
  "creator_id": "1388767",
  "bpm": "174",
  "source": "osu!",
  "tags": "featured artist lenfried- famoss mappers' guild fa chiptune 8bit aaron dictor electronic",
  "genre_id": "1",
  "language_id": "1",
  "favourite_count": "1",
  "rating": "0",
  "playcount": "9",
  "passcount": "0",
  "max_combo": null,
  "diff_aim": null,
  "diff_speed": null,
  "difficultyrating": "4.318020820617676"
}, {
  "beatmapset_id": "747507",
  "beatmap_id": "1575098",
  "approved": "3",
  "total_length": "199",
  "hit_length": "183",
  "version": "Collab Hard",
  "file_md5": "bc4b04103cd263b039fc8349420493a7",
  "diff_size": "3.8",
  "diff_overall": "6",
  "diff_approach": "7.5",
  "diff_drain": "5",
  "mode": "0",
  "submit_date": "2018-03-11 14:14:22",
  "approved_date": "2019-05-22 16:36:04",
  "last_update": "2019-05-21 12:48:00",
  "artist": "senya",
  "title": "Terasareru kurai no Shiawase",
  "creator": "Satellite",
  "creator_id": "1661227",
  "bpm": "160",
  "source": "\u6771\u65b9Project",
  "tags": "\u5e7d\u9589\u30b5\u30c6\u30e9\u30a4\u30c8 touhou sellenite dailycare -mo- shirasaka_koume voyage 1969 \u6771\u65b9\u6c38\u591c\u6284 imperishable night stage 6 theme \u304b\u307e\u305b\u864e kamasetora \u795e\u5948\u68ee\u30e6\u30a6 hizumi \u96f6\u308c\u305a\u306e\u9858\u3044\u30b4\u30c8 koborezu no negai goto dagger-gazel yuuhei",
  "genre_id": "1",
  "language_id": "1",
  "favourite_count": "11",
  "rating": "0",
  "playcount": "0",
  "passcount": "0",
  "max_combo": "839",
  "diff_aim": "1.5965542793273926",
  "diff_speed": "1.6582205295562744",
  "difficultyrating": "3.2856078147888184"
}, {
  "beatmapset_id": "747507",
  "beatmap_id": "1575099",
  "approved": "3",
  "total_length": "199",
  "hit_length": "182",
  "version": "Koume's Lunatic",
  "file_md5": "7851625279d6e841ef810ced825d8f5a",
  "diff_size": "3.8",
  "diff_overall": "8",
  "diff_approach": "9",
  "diff_drain": "5.5",
  "mode": "0",
  "submit_date": "2018-03-11 14:14:22",
  "approved_date": "2019-05-22 16:36:04",
  "last_update": "2019-05-21 12:48:00",
  "artist": "senya",
  "title": "Terasareru kurai no Shiawase",
  "creator": "Satellite",
  "creator_id": "1661227",
  "bpm": "160",
  "source": "\u6771\u65b9Project",
  "tags": "\u5e7d\u9589\u30b5\u30c6\u30e9\u30a4\u30c8 touhou sellenite dailycare -mo- shirasaka_koume voyage 1969 \u6771\u65b9\u6c38\u591c\u6284 imperishable night stage 6 theme \u304b\u307e\u305b\u864e kamasetora \u795e\u5948\u68ee\u30e6\u30a6 hizumi \u96f6\u308c\u305a\u306e\u9858\u3044\u30b4\u30c8 koborezu no negai goto dagger-gazel yuuhei",
  "genre_id": "1",
  "language_id": "1",
  "favourite_count": "11",
  "rating": "0",
  "playcount": "0",
  "passcount": "0",
  "max_combo": "1022",
  "diff_aim": "2.5197982788085938",
  "diff_speed": "2.2990376949310303",
  "difficultyrating": "4.929216384887695"
}, {
  "beatmapset_id": "747507",
  "beatmap_id": "1575100",
  "approved": "3",
  "total_length": "199",
  "hit_length": "197",
  "version": "Mo's Lunatic",
  "file_md5": "9572a8b9f12005624ac623f889f5faba",
  "diff_size": "4.2",
  "diff_overall": "7.6",
  "diff_approach": "8.8",
  "diff_drain": "6",
  "mode": "0",
  "submit_date": "2018-03-11 14:14:22",
  "approved_date": "2019-05-22 16:36:04",
  "last_update": "2019-05-21 12:48:00",
  "artist": "senya",
  "title": "Terasareru kurai no Shiawase",
  "creator": "Satellite",
  "creator_id": "1661227",
  "bpm": "160",
  "source": "\u6771\u65b9Project",
  "tags": "\u5e7d\u9589\u30b5\u30c6\u30e9\u30a4\u30c8 touhou sellenite dailycare -mo- shirasaka_koume voyage 1969 \u6771\u65b9\u6c38\u591c\u6284 imperishable night stage 6 theme \u304b\u307e\u305b\u864e kamasetora \u795e\u5948\u68ee\u30e6\u30a6 hizumi \u96f6\u308c\u305a\u306e\u9858\u3044\u30b4\u30c8 koborezu no negai goto dagger-gazel yuuhei",
  "genre_id": "1",
  "language_id": "1",
  "favourite_count": "11",
  "rating": "0",
  "playcount": "0",
  "passcount": "0",
  "max_combo": "1108",
  "diff_aim": "2.3829450607299805",
  "diff_speed": "2.201321601867676",
  "difficultyrating": "4.675078392028809"
}, {
  "beatmapset_id": "747507",
  "beatmap_id": "1575101",
  "approved": "3",
  "total_length": "199",
  "hit_length": "182",
  "version": "Satellite",
  "file_md5": "db69457a6d3eda63c9de4af73c556bee",
  "diff_size": "4",
  "diff_overall": "8.4",
  "diff_approach": "9.2",
  "diff_drain": "6.2",
  "mode": "0",
  "submit_date": "2018-03-11 14:14:22",
  "approved_date": "2019-05-22 16:36:04",
  "last_update": "2019-05-21 12:48:00",
  "artist": "senya",
  "title": "Terasareru kurai no Shiawase",
  "creator": "Satellite",
  "creator_id": "1661227",
  "bpm": "160",
  "source": "\u6771\u65b9Project",
  "tags": "\u5e7d\u9589\u30b5\u30c6\u30e9\u30a4\u30c8 touhou sellenite dailycare -mo- shirasaka_koume voyage 1969 \u6771\u65b9\u6c38\u591c\u6284 imperishable night stage 6 theme \u304b\u307e\u305b\u864e kamasetora \u795e\u5948\u68ee\u30e6\u30a6 hizumi \u96f6\u308c\u305a\u306e\u9858\u3044\u30b4\u30c8 koborezu no negai goto dagger-gazel yuuhei",
  "genre_id": "1",
  "language_id": "1",
  "favourite_count": "11",
  "rating": "0",
  "playcount": "0",
  "passcount": "0",
  "max_combo": "1138",
  "diff_aim": "2.7451868057250977",
  "diff_speed": "2.3703885078430176",
  "difficultyrating": "5.302974224090576"
}, {
  "beatmapset_id": "747507",
  "beatmap_id": "1643432",
  "approved": "3",
  "total_length": "199",
  "hit_length": "183",
  "version": "Sellenite's Normal",
  "file_md5": "2f143083aa9bc12f94318d467a2cdd41",
  "diff_size": "3.5",
  "diff_overall": "4",
  "diff_approach": "5.5",
  "diff_drain": "4",
  "mode": "0",
  "submit_date": "2018-03-11 14:14:22",
  "approved_date": "2019-05-22 16:36:04",
  "last_update": "2019-05-21 12:48:00",
  "artist": "senya",
  "title": "Terasareru kurai no Shiawase",
  "creator": "Satellite",
  "creator_id": "1661227",
  "bpm": "160",
  "source": "\u6771\u65b9Project",
  "tags": "\u5e7d\u9589\u30b5\u30c6\u30e9\u30a4\u30c8 touhou sellenite dailycare -mo- shirasaka_koume voyage 1969 \u6771\u65b9\u6c38\u591c\u6284 imperishable night stage 6 theme \u304b\u307e\u305b\u864e kamasetora \u795e\u5948\u68ee\u30e6\u30a6 hizumi \u96f6\u308c\u305a\u306e\u9858\u3044\u30b4\u30c8 koborezu no negai goto dagger-gazel yuuhei",
  "genre_id": "1",
  "language_id": "1",
  "favourite_count": "11",
  "rating": "0",
  "playcount": "0",
  "passcount": "0",
  "max_combo": "584",
  "diff_aim": "1.1335170269012451",
  "diff_speed": "1.0233529806137085",
  "difficultyrating": "2.211951971054077"
}, {
  "beatmapset_id": "747507",
  "beatmap_id": "1659358",
  "approved": "3",
  "total_length": "199",
  "hit_length": "173",
  "version": "Easy",
  "file_md5": "5ede8b76217cbf0e22980e990905181d",
  "diff_size": "3",
  "diff_overall": "2",
  "diff_approach": "3",
  "diff_drain": "2",
  "mode": "0",
  "submit_date": "2018-03-11 14:14:22",
  "approved_date": "2019-05-22 16:36:04",
  "last_update": "2019-05-21 12:48:00",
  "artist": "senya",
  "title": "Terasareru kurai no Shiawase",
  "creator": "Satellite",
  "creator_id": "1661227",
  "bpm": "160",
  "source": "\u6771\u65b9Project",
  "tags": "\u5e7d\u9589\u30b5\u30c6\u30e9\u30a4\u30c8 touhou sellenite dailycare -mo- shirasaka_koume voyage 1969 \u6771\u65b9\u6c38\u591c\u6284 imperishable night stage 6 theme \u304b\u307e\u305b\u864e kamasetora \u795e\u5948\u68ee\u30e6\u30a6 hizumi \u96f6\u308c\u305a\u306e\u9858\u3044\u30b4\u30c8 koborezu no negai goto dagger-gazel yuuhei",
  "genre_id": "1",
  "language_id": "1",
  "favourite_count": "11",
  "rating": "0",
  "playcount": "0",
  "passcount": "0",
  "max_combo": "483",
  "diff_aim": "1.0374764204025269",
  "diff_speed": "0.9278122186660767",
  "difficultyrating": "2.020120620727539"
}];

const beatMapToDifficulty = [...new Set(beatmapResp.map(b =>b.beatmapset_id))]
                .map(bm => ({
                   beatmapset_id: bm, 
                   difficultyratings: beatmapResp.reverse()
                                                  .find(br => br.beatmapset_id === bm)
                                                  .difficultyrating
                   }));
                            
console.log(beatMapToDifficulty);

Upvotes: 0

Josejulio

Reputation: 1295

From what i see in your code, it looks like the answer is already parsed in resp. There is no point in stringify that and parsing again, you can just filter the values that you need out of that array.

If what I understood is correct, you want to get all difficultyrating of a beatmapset_id

You can do it by doing a filter and a map.

e.g.

resp.filter(beatmap => beatmap.beatmapset_id === "971561").map(beatmap => beatmap.difficultyrating)

will yield:

["1.2615262269973755", "3.590883255004883", "2.367466926574707", "4.318020820617676"]

If you want to use the last beatmap, you can replace the number with resp[resp.length - 1].beatmapset_id

resp.filter(beatmap => beatmap.beatmapset_id === resp[resp.length - 1].beatmapset_id).map(beatmap => beatmap.difficultyrating)

If you want to group them, you can use reduce like this:

bySetId = resp.reduce((bySetId, current) => {
  if (!bySetId[current.beatmapset_id]) {
    bySetId[current.beatmapset_id] = []
  }
  bySetId[current.beatmapset_id].push(current.difficultyrating)
  return bySetId;
}, {});

bySetId will have the value:

{
  747507: 
    [ "3.2856078147888184", "4.929216384887695", "4.675078392028809", 
      "5.302974224090576", "2.211951971054077", "2.020120620727539"]
  971561: 
    [ "1.2615262269973755", "3.590883255004883", "2.367466926574707", 
      "4.318020820617676"]
}

Then you can use that to merge on your previous values If needed.

Upvotes: 1

Alaksandar Jesus Gene

Reputation: 6887

var input = [{
	"beatmapset_id": "971561",
	"beatmap_id": "2034200",
	"approved": "3",
	"total_length": "196",
	"hit_length": "186",
	"version": "Easy",
	"file_md5": "9c8eb80f6e245b5b0a0a100bbb3e274c",
	"diff_size": "4",
	"diff_overall": "7",
	"diff_approach": "5",
	"diff_drain": "7",
	"mode": "3",
	"submit_date": "2019-05-14 12:01:13",
	"approved_date": "2019-05-22 15:49:35",
	"last_update": "2019-05-22 11:51:06",
	"artist": "antiPLUR",
	"title": "Runengon",
	"creator": "Raveille",
	"creator_id": "1388767",
	"bpm": "174",
	"source": "osu!",
	"tags": "featured artist lenfried- famoss mappers' guild fa chiptune 8bit aaron dictor electronic",
	"genre_id": "1",
	"language_id": "1",
	"favourite_count": "1",
	"rating": "0",
	"playcount": "0",
	"passcount": "0",
	"max_combo": null,
	"diff_aim": null,
	"diff_speed": null,
	"difficultyrating": "1.2615262269973755"
}, {
	"beatmapset_id": "971561",
	"beatmap_id": "2034201",
	"approved": "3",
	"total_length": "196",
	"hit_length": "196",
	"version": "Hard",
	"file_md5": "b5fbe1a1444e35ecb7f8f03e2b61986b",
	"diff_size": "4",
	"diff_overall": "8",
	"diff_approach": "5",
	"diff_drain": "8",
	"mode": "3",
	"submit_date": "2019-05-14 12:01:13",
	"approved_date": "2019-05-22 15:49:35",
	"last_update": "2019-05-22 11:51:06",
	"artist": "antiPLUR",
	"title": "Runengon",
	"creator": "Raveille",
	"creator_id": "1388767",
	"bpm": "174",
	"source": "osu!",
	"tags": "featured artist lenfried- famoss mappers' guild fa chiptune 8bit aaron dictor electronic",
	"genre_id": "1",
	"language_id": "1",
	"favourite_count": "1",
	"rating": "0",
	"playcount": "27",
	"passcount": "9",
	"max_combo": null,
	"diff_aim": null,
	"diff_speed": null,
	"difficultyrating": "3.590883255004883"
}, {
	"beatmapset_id": "971561",
	"beatmap_id": "2034202",
	"approved": "3",
	"total_length": "196",
	"hit_length": "196",
	"version": "Normal",
	"file_md5": "f7f23e1073b508593d98cb50097b0d7e",
	"diff_size": "4",
	"diff_overall": "7.5",
	"diff_approach": "5",
	"diff_drain": "7.5",
	"mode": "3",
	"submit_date": "2019-05-14 12:01:13",
	"approved_date": "2019-05-22 15:49:35",
	"last_update": "2019-05-22 11:51:06",
	"artist": "antiPLUR",
	"title": "Runengon",
	"creator": "Raveille",
	"creator_id": "1388767",
	"bpm": "174",
	"source": "osu!",
	"tags": "featured artist lenfried- famoss mappers' guild fa chiptune 8bit aaron dictor electronic",
	"genre_id": "1",
	"language_id": "1",
	"favourite_count": "1",
	"rating": "0",
	"playcount": "0",
	"passcount": "0",
	"max_combo": null,
	"diff_aim": null,
	"diff_speed": null,
	"difficultyrating": "2.367466926574707"
}, {
	"beatmapset_id": "971561",
	"beatmap_id": "2039384",
	"approved": "3",
	"total_length": "196",
	"hit_length": "189",
	"version": "Lenfried's Insane",
	"file_md5": "de4b9a01bf44a847b7cebb96da623ccf",
	"diff_size": "4",
	"diff_overall": "8.5",
	"diff_approach": "5",
	"diff_drain": "8.5",
	"mode": "3",
	"submit_date": "2019-05-14 12:01:13",
	"approved_date": "2019-05-22 15:49:35",
	"last_update": "2019-05-22 11:51:06",
	"artist": "antiPLUR",
	"title": "Runengon",
	"creator": "Raveille",
	"creator_id": "1388767",
	"bpm": "174",
	"source": "osu!",
	"tags": "featured artist lenfried- famoss mappers' guild fa chiptune 8bit aaron dictor electronic",
	"genre_id": "1",
	"language_id": "1",
	"favourite_count": "1",
	"rating": "0",
	"playcount": "9",
	"passcount": "0",
	"max_combo": null,
	"diff_aim": null,
	"diff_speed": null,
	"difficultyrating": "4.318020820617676"
}, {
	"beatmapset_id": "747507",
	"beatmap_id": "1575098",
	"approved": "3",
	"total_length": "199",
	"hit_length": "183",
	"version": "Collab Hard",
	"file_md5": "bc4b04103cd263b039fc8349420493a7",
	"diff_size": "3.8",
	"diff_overall": "6",
	"diff_approach": "7.5",
	"diff_drain": "5",
	"mode": "0",
	"submit_date": "2018-03-11 14:14:22",
	"approved_date": "2019-05-22 16:36:04",
	"last_update": "2019-05-21 12:48:00",
	"artist": "senya",
	"title": "Terasareru kurai no Shiawase",
	"creator": "Satellite",
	"creator_id": "1661227",
	"bpm": "160",
	"source": "\u6771\u65b9Project",
	"tags": "\u5e7d\u9589\u30b5\u30c6\u30e9\u30a4\u30c8 touhou sellenite dailycare -mo- shirasaka_koume voyage 1969 \u6771\u65b9\u6c38\u591c\u6284 imperishable night stage 6 theme \u304b\u307e\u305b\u864e kamasetora \u795e\u5948\u68ee\u30e6\u30a6 hizumi \u96f6\u308c\u305a\u306e\u9858\u3044\u30b4\u30c8 koborezu no negai goto dagger-gazel yuuhei",
	"genre_id": "1",
	"language_id": "1",
	"favourite_count": "11",
	"rating": "0",
	"playcount": "0",
	"passcount": "0",
	"max_combo": "839",
	"diff_aim": "1.5965542793273926",
	"diff_speed": "1.6582205295562744",
	"difficultyrating": "3.2856078147888184"
}, {
	"beatmapset_id": "747507",
	"beatmap_id": "1575099",
	"approved": "3",
	"total_length": "199",
	"hit_length": "182",
	"version": "Koume's Lunatic",
	"file_md5": "7851625279d6e841ef810ced825d8f5a",
	"diff_size": "3.8",
	"diff_overall": "8",
	"diff_approach": "9",
	"diff_drain": "5.5",
	"mode": "0",
	"submit_date": "2018-03-11 14:14:22",
	"approved_date": "2019-05-22 16:36:04",
	"last_update": "2019-05-21 12:48:00",
	"artist": "senya",
	"title": "Terasareru kurai no Shiawase",
	"creator": "Satellite",
	"creator_id": "1661227",
	"bpm": "160",
	"source": "\u6771\u65b9Project",
	"tags": "\u5e7d\u9589\u30b5\u30c6\u30e9\u30a4\u30c8 touhou sellenite dailycare -mo- shirasaka_koume voyage 1969 \u6771\u65b9\u6c38\u591c\u6284 imperishable night stage 6 theme \u304b\u307e\u305b\u864e kamasetora \u795e\u5948\u68ee\u30e6\u30a6 hizumi \u96f6\u308c\u305a\u306e\u9858\u3044\u30b4\u30c8 koborezu no negai goto dagger-gazel yuuhei",
	"genre_id": "1",
	"language_id": "1",
	"favourite_count": "11",
	"rating": "0",
	"playcount": "0",
	"passcount": "0",
	"max_combo": "1022",
	"diff_aim": "2.5197982788085938",
	"diff_speed": "2.2990376949310303",
	"difficultyrating": "4.929216384887695"
}, {
	"beatmapset_id": "747507",
	"beatmap_id": "1575100",
	"approved": "3",
	"total_length": "199",
	"hit_length": "197",
	"version": "Mo's Lunatic",
	"file_md5": "9572a8b9f12005624ac623f889f5faba",
	"diff_size": "4.2",
	"diff_overall": "7.6",
	"diff_approach": "8.8",
	"diff_drain": "6",
	"mode": "0",
	"submit_date": "2018-03-11 14:14:22",
	"approved_date": "2019-05-22 16:36:04",
	"last_update": "2019-05-21 12:48:00",
	"artist": "senya",
	"title": "Terasareru kurai no Shiawase",
	"creator": "Satellite",
	"creator_id": "1661227",
	"bpm": "160",
	"source": "\u6771\u65b9Project",
	"tags": "\u5e7d\u9589\u30b5\u30c6\u30e9\u30a4\u30c8 touhou sellenite dailycare -mo- shirasaka_koume voyage 1969 \u6771\u65b9\u6c38\u591c\u6284 imperishable night stage 6 theme \u304b\u307e\u305b\u864e kamasetora \u795e\u5948\u68ee\u30e6\u30a6 hizumi \u96f6\u308c\u305a\u306e\u9858\u3044\u30b4\u30c8 koborezu no negai goto dagger-gazel yuuhei",
	"genre_id": "1",
	"language_id": "1",
	"favourite_count": "11",
	"rating": "0",
	"playcount": "0",
	"passcount": "0",
	"max_combo": "1108",
	"diff_aim": "2.3829450607299805",
	"diff_speed": "2.201321601867676",
	"difficultyrating": "4.675078392028809"
}, {
	"beatmapset_id": "747507",
	"beatmap_id": "1575101",
	"approved": "3",
	"total_length": "199",
	"hit_length": "182",
	"version": "Satellite",
	"file_md5": "db69457a6d3eda63c9de4af73c556bee",
	"diff_size": "4",
	"diff_overall": "8.4",
	"diff_approach": "9.2",
	"diff_drain": "6.2",
	"mode": "0",
	"submit_date": "2018-03-11 14:14:22",
	"approved_date": "2019-05-22 16:36:04",
	"last_update": "2019-05-21 12:48:00",
	"artist": "senya",
	"title": "Terasareru kurai no Shiawase",
	"creator": "Satellite",
	"creator_id": "1661227",
	"bpm": "160",
	"source": "\u6771\u65b9Project",
	"tags": "\u5e7d\u9589\u30b5\u30c6\u30e9\u30a4\u30c8 touhou sellenite dailycare -mo- shirasaka_koume voyage 1969 \u6771\u65b9\u6c38\u591c\u6284 imperishable night stage 6 theme \u304b\u307e\u305b\u864e kamasetora \u795e\u5948\u68ee\u30e6\u30a6 hizumi \u96f6\u308c\u305a\u306e\u9858\u3044\u30b4\u30c8 koborezu no negai goto dagger-gazel yuuhei",
	"genre_id": "1",
	"language_id": "1",
	"favourite_count": "11",
	"rating": "0",
	"playcount": "0",
	"passcount": "0",
	"max_combo": "1138",
	"diff_aim": "2.7451868057250977",
	"diff_speed": "2.3703885078430176",
	"difficultyrating": "5.302974224090576"
}, {
	"beatmapset_id": "747507",
	"beatmap_id": "1643432",
	"approved": "3",
	"total_length": "199",
	"hit_length": "183",
	"version": "Sellenite's Normal",
	"file_md5": "2f143083aa9bc12f94318d467a2cdd41",
	"diff_size": "3.5",
	"diff_overall": "4",
	"diff_approach": "5.5",
	"diff_drain": "4",
	"mode": "0",
	"submit_date": "2018-03-11 14:14:22",
	"approved_date": "2019-05-22 16:36:04",
	"last_update": "2019-05-21 12:48:00",
	"artist": "senya",
	"title": "Terasareru kurai no Shiawase",
	"creator": "Satellite",
	"creator_id": "1661227",
	"bpm": "160",
	"source": "\u6771\u65b9Project",
	"tags": "\u5e7d\u9589\u30b5\u30c6\u30e9\u30a4\u30c8 touhou sellenite dailycare -mo- shirasaka_koume voyage 1969 \u6771\u65b9\u6c38\u591c\u6284 imperishable night stage 6 theme \u304b\u307e\u305b\u864e kamasetora \u795e\u5948\u68ee\u30e6\u30a6 hizumi \u96f6\u308c\u305a\u306e\u9858\u3044\u30b4\u30c8 koborezu no negai goto dagger-gazel yuuhei",
	"genre_id": "1",
	"language_id": "1",
	"favourite_count": "11",
	"rating": "0",
	"playcount": "0",
	"passcount": "0",
	"max_combo": "584",
	"diff_aim": "1.1335170269012451",
	"diff_speed": "1.0233529806137085",
	"difficultyrating": "2.211951971054077"
}, {
	"beatmapset_id": "747507",
	"beatmap_id": "1659358",
	"approved": "3",
	"total_length": "199",
	"hit_length": "173",
	"version": "Easy",
	"file_md5": "5ede8b76217cbf0e22980e990905181d",
	"diff_size": "3",
	"diff_overall": "2",
	"diff_approach": "3",
	"diff_drain": "2",
	"mode": "0",
	"submit_date": "2018-03-11 14:14:22",
	"approved_date": "2019-05-22 16:36:04",
	"last_update": "2019-05-21 12:48:00",
	"artist": "senya",
	"title": "Terasareru kurai no Shiawase",
	"creator": "Satellite",
	"creator_id": "1661227",
	"bpm": "160",
	"source": "\u6771\u65b9Project",
	"tags": "\u5e7d\u9589\u30b5\u30c6\u30e9\u30a4\u30c8 touhou sellenite dailycare -mo- shirasaka_koume voyage 1969 \u6771\u65b9\u6c38\u591c\u6284 imperishable night stage 6 theme \u304b\u307e\u305b\u864e kamasetora \u795e\u5948\u68ee\u30e6\u30a6 hizumi \u96f6\u308c\u305a\u306e\u9858\u3044\u30b4\u30c8 koborezu no negai goto dagger-gazel yuuhei",
	"genre_id": "1",
	"language_id": "1",
	"favourite_count": "11",
	"rating": "0",
	"playcount": "0",
	"passcount": "0",
	"max_combo": "483",
	"diff_aim": "1.0374764204025269",
	"diff_speed": "0.9278122186660767",
	"difficultyrating": "2.020120620727539"
}];


var extract_beatmapset_id = input.map((item) => {
  return {
  beatmapset_id:item.beatmapset_id,
  difficultyrating:item.difficultyrating
  }
});
var result = {};
extract_beatmapset_id.forEach((item)=>{
  if(!result[item.beatmapset_id]){
    result[item.beatmapset_id] = [];
  }
   result[item.beatmapset_id].push(item.difficultyrating);
});

console.log(result)

You can execute the code without extract too.. But its preferable to extract items on focus so we dont disturb other items by mistake (only suggestion).

Upvotes: 0

Parse all JSON object with same id value

Answers (3)

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