Functional JavaScript, remove assignment -

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how can avoid self variable here?

function urlbuilder(endpoint){     var status = ["user_timeline", "home_timeline", "retweets_of_me", "show", "retweets",              "update", "update_with_media", "retweet", "unretweet", "retweeters", "lookup"         ],         friendships = ["incoming", "outgoing", "create", "destroy", "update", "show"];      let endpoints = {         status: status,         friendships: friendships     }      var self = { };      endpoints[endpoint].foreach(e => {         self[e] = endpoint + "/" + e;     });      return self;  }

somewhat better, still assignment statement. 

return [{}].map(el => {   endpoints[endpoint].foreach(e => {     el[e] = endpoint + "/" + e;   });   return el; })[0];

you cannot really. create object dynamic number of properties (and without using json.parse) need mutate assignment or similar.

your best bet might be

return endpoints[endpoint].reduce((self, e) => {     self[e] = endpoint + "/" + e;     return self; }, {});

which quite functional.


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