Let's say I have the following data:

var data = {
    activeUser: { id: 3, name: 'Joe', something: 'else' },
    location: {
        users: [{id: 1}, {id: 2}, {id: 3}]
    }
};

I want to return a boolean whether or not the activeUser can be found in the data.location.users array. Note that the objects in the location.users array will NOT have the same keys as the activeUser object.

Is there a normal underscore way to do this? I have the following.

var userExists = (_.findWhere(data.location.users, {id: data.activeUser.id})) ? true : false;

I'm using the findWhere method to either return an object or null if it doesn't exist.

Let's say I have the following data:

var data = {
    activeUser: { id: 3, name: 'Joe', something: 'else' },
    location: {
        users: [{id: 1}, {id: 2}, {id: 3}]
    }
};

I want to return a boolean whether or not the activeUser can be found in the data.location.users array. Note that the objects in the location.users array will NOT have the same keys as the activeUser object.

Is there a normal underscore way to do this? I have the following.

var userExists = (_.findWhere(data.location.users, {id: data.activeUser.id})) ? true : false;

I'm using the findWhere method to either return an object or null if it doesn't exist.

• javascript
• underscore.js

• stackoverflow./questions/143847/… – ClearBoth Commented Jan 25, 2016 at 0:10

1 Answer 1

One alternative option would be to use the ._some() method. It will return a boolean based on whether anything was found:

var userExists = _.some(data.location.users, function (user) {
  return user.id === data.activeUser.id;
});