lodash的mapValues适用于所有键

Question

I'm trying to use lodash in the most elegant way possible to convert the following object:

var original = {
  email: {
    0: 'user01@gmail.com',
    1: 'user02@gmail.com',
    2: 'user03@gmail.com'
  },
  name: {
    0: 'Sam',
    1: 'Jack',
    2: 'Lucy'
  },
  last_name: {
    0: 'Smith',
    1: 'Green',
    2: 'Tompson'
  }
};

Into this:

var expected = [
  {
    email: 'user01@gmail.com',
    name: 'Sam',
    last_name: 'Smith'
  },
  {
    email: 'user02@gmail.com',
    name: 'Jack',
    last_name: 'Green'
  },
  {
    email: 'user03@gmail.com',
    name: 'Lucy',
    last_name: 'Tompson'
  }
];

I know I can use _.mapValues(original, index); where index is either 0 , 1 or 2 , but I need an array with all mapValues.

The keys in original are variable (sometimes there are 3, sometimes there are 2, sometimes 6) as are the number of indexes. I've found a few solutions, but they all seem too convoluted. I have a feeling there's an elegant way of doing this with a few lodash's methods. Any help would be appreciated.

Answer 1

How about this:

// _.size(_.values(original)[0]) - amount of rows (3 in that case)
var expected = _.times(_.size(_.values(original)[0]), function (index) {
    return _.mapValues(original, index);
});

Edit : one line

var expected = _.times(_.size(_.values(original)[0]), _.mapValues.bind(_, original));