javascript - how to use promise.all inside then()-chain -

it may question title off, in case promise.all not need solve issue.

i have then() - chain in promise , have series of similar operations should handle differently, new promises.

return new promise(function(resolve, reject) {      c.scraper.load().then(function () {      ....          var personurl = url + "/" + c.people[0];         return c.checkperson(personurl);      }).then(function(){          var personurl = url + "/" + c.people[1];         return c.checkperson(personurl);      }).then(function(){          var personurl = url + "/" + c.people[2];         return c.checkperson(personurl);      .... 

i think problem.

the first step combine these 3 one, , second step, if possible, make work unknown number of people in array c.people.

first, since c.scraper.load() returns promise, can return result of entire promise chain, , don't need wrap in new promise(...).

next, since c.people seems array of paths want fetch, can map array list of promises, use promise.all() wait them resolve:

return c.scraper.load().then(function () {     return promise.all(c.people.map(function (person) {         var personurl = url + "/" + person;         return c.checkperson(personurl);     })); }).then(function (results) {     // `results` array containing results of `checkperson()` calls }); 

does help?