Javascript: Iterating over a promise contained in an object

Question

Javascript: Iterating over a promise contained in an object

Currently, I am attempting to iterate through a return from an API that supposedly contains an object with a promise within it.

You can find the API documentation here: https://github.com/sentanos/roblox-js/wiki/Main-Functions

This is what my code looks like so far:

var rbx = require('roblox-js');

      rbx.login('INF_BOT', '$$$')
      .then(function (info) {
      console.log('Logged in with ID ' + info.userId)
    })
      .catch(function (err) {
      console.error(err.stack);
    });

  var Players = rbx.getPlayers(539310, 1, false, -2)

for (var plr in Players) {
   console.log(plr);
}

I have never encountered a promise nested within an object before, and I'm uncertain of how to access the returned players from this promise. The API documentation linked above provides some information under the function getPlayers().

javascript

Answer 1

Answer №1

Prior to the login action promise being fulfilled, attempting to execute getPlayers() will not work as the rbx object is not yet authenticated. This means that while the promise resolves in the future asynchronously, getPlayers() is called synchronously immediately after login(). To resolve this issue, you should invoke getPlayers() within the then clause once the promise is fulfilled:

var rbx = require('roblox-js');

rbx.login('INF_BOT', '$$$')
  .then(function (info) {
    console.log('Logged in with ID ' + info.userId);
    var Players = rbx.getPlayers(539310, 1, false, -2);
    for (var plr in Players) {
      console.log(plr);
    }
  })
  .catch(function (err) {
    console.error(err.stack);
  });

Additionally, ensure that getPlayers() returns a promise, which it likely does, and call it similar to how login() is called.

Answer 2

Prior to the login action promise being fulfilled, attempting to execute getPlayers() will not work as the rbx object is not yet authenticated. This means that while the promise resolves in the future asynchronously, getPlayers() is called synchronously immediately after login(). To resolve this issue, you should invoke getPlayers() within the then clause once the promise is fulfilled:

var rbx = require('roblox-js');

rbx.login('INF_BOT', '$$$')
  .then(function (info) {
    console.log('Logged in with ID ' + info.userId);
    var Players = rbx.getPlayers(539310, 1, false, -2);
    for (var plr in Players) {
      console.log(plr);
    }
  })
  .catch(function (err) {
    console.error(err.stack);
  });

Additionally, ensure that getPlayers() returns a promise, which it likely does, and call it similar to how login() is called.

Answer 3

Answer №2

Placing the loop inside the .then function is essential to ensure that you are accessing data that is already present. Here is a simplified example of how it might look:

var rbx = require('roblox-js');

  rbx.login('INF_BOT', '$$$')
  .then(function (info) {
      console.log('Logged in with ID ' + info.userId)
      rbx.getPlayers(539310, 1, false, -2).promise.then(function(Players){
          for (var plr in Players) {
           console.log(plr);
          }
      });        
    });
  })
  .catch(function (err) {
  console.error(err.stack);
});

It's important to consult the API documentation to see if the collection you need is passed to .then(). This is a common structure, but there are other ways to organize it based on your requirements.

Keep in mind that the assumption here is that getPlayers() returns a promise.

Answer 4

Placing the loop inside the .then function is essential to ensure that you are accessing data that is already present. Here is a simplified example of how it might look:

var rbx = require('roblox-js');

  rbx.login('INF_BOT', '$$$')
  .then(function (info) {
      console.log('Logged in with ID ' + info.userId)
      rbx.getPlayers(539310, 1, false, -2).promise.then(function(Players){
          for (var plr in Players) {
           console.log(plr);
          }
      });        
    });
  })
  .catch(function (err) {
  console.error(err.stack);
});

It's important to consult the API documentation to see if the collection you need is passed to .then(). This is a common structure, but there are other ways to organize it based on your requirements.

Keep in mind that the assumption here is that getPlayers() returns a promise.

Javascript: Iterating over a promise contained in an object

Answer №1

Answer №2

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