Sort an array of objects with a date field by date

Question

Give the following array of objects, I need to sort them by date field in ascending order.

var myArray = [
  {
    name: "Joe Blow",
    date: "Mon Oct 31 2016 00:00:00 GMT-0700 (PDT)"
  },
  {
    name: "Sam Snead",
    date: "Sun Oct 30 2016 00:00:00 GMT-0700 (PDT)"
  },
  {
    name: "John Smith",
    date: "Sat Oct 29 2016 00:00:00 GMT-0700 (PDT)"  
  }
];

so in this example, the end result will be John Smith, Sam Sned, and Joe Bloov.

I am trying to use lodash _. sortBy () , but I can not go through sorting, no matter how I try to use it:

_.sortBy(myArray, function(dateObj) {
  return dateObj.date;
});

or

_.sortBy(myArray, 'date');

What do I need to change to arrange my array? I also have Moment.js, so I can use it to format the date string if necessary. I tried converting the date property with .unix (), but that did not help.

Thank.

Answer 1

lodash. JavaScript Array.prototype.sort.

Date , .

var myArray = [{
  name: "Joe Blow",
  date: "Mon Oct 31 2016 00:00:00 GMT-0700 (PDT)"
}, {
  name: "Sam Snead",
  date: "Sun Oct 30 2016 00:00:00 GMT-0700 (PDT)"
}, {
  name: "John Smith",
  date: "Sat Oct 29 2016 00:00:00 GMT-0700 (PDT)"
}];

myArray.sort(function compare(a, b) {
  var dateA = new Date(a.date);
  var dateB = new Date(b.date);
  return dateA - dateB;
});

console.log(myArray);

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Answer 2

- , new Date(), javascript date. , ( _.sortBy).

var myArray = [
  {
    name: "Joe Blow",
    date: "Mon Oct 31 2016 00:00:00 GMT-0700 (PDT)"
  },
  {
    name: "Sam Snead",
    date: "Sun Oct 30 2016 00:00:00 GMT-0700 (PDT)"
  },
  {
    name: "John Smith",
    date: "Sat Oct 29 2016 00:00:00 GMT-0700 (PDT)"  
  }
];

myArray = _.sortBy(myArray, function(dateObj) {
  return new Date(dateObj.date);
});

console.log(myArray)

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.2/lodash.min.js"></script>

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Answer 3

Javascript .

myArray.sort((d1, d2) => new Date(d1.date).getTime() - new Date(d2.date).getTime());

:

var myArray = [
  {
    name: "Joe Blow",
    date: "Mon Oct 31 2016 00:00:00 GMT-0700 (PDT)"
  },
  {
    name: "Sam Snead",
    date: "Sun Oct 30 2016 00:00:00 GMT-0700 (PDT)"
  },
  {
    name: "John Smith",
    date: "Sat Oct 29 2016 00:00:00 GMT-0700 (PDT)"  
  }
];

myArray.sort((d1, d2) => new Date(d1.date).getTime() - new Date(d2.date).getTime());

console.log(myArray);

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