Sort array of objects by string property value

I have an array of JavaScript objects:

var objs = [ 
    { first_nom: 'Lazslo', last_nom: 'Jamf'     },
    { first_nom: 'Pig',    last_nom: 'Bodine'   },
    { first_nom: 'Pirate', last_nom: 'Prentice' }
];

How can I sort them by the value of last_nom in JavaScript?

I know about sort(a,b), but that only seems to work on strings and numbers. Do I need to add a toString() method to my objects?

转载于:https://stackoverflow.com/questions/1129216/sort-array-of-objects-by-string-property-value?page=2&tab=votes

Way 1 :

You can use Underscore.js. Import underscore first.

 import * as _ from 'underscore';
 let SortedObjs = _.sortBy(objs, 'last_nom');

Way 2 : Use compare function.

function compare(first, second) {
     if (first.last_nom < second.last_nom)
         return -1;
     if (first.last_nom > second.last_nom)
       return 1;
    return 0;
 }

objs.sort(compare);

It works for me. Here It will keep undefined to the end.

 function sort(items, property, direction) {

    function compare(a, b) {
      if(!a[property] && !b[property]) {
        return 0;
      } else if(a[property] && !b[property]) {
        return -1;
      } else if(!a[property] && b[property]) {
        return 1;
      } else {
        const value1 = a[property].toString().toUpperCase(); // ignore upper and lowercase
        const value2 = b[property].toString().toUpperCase(); // ignore upper and lowercase
        if (value1 < value2) {
          return direction === 0 ? -1 : 1;
        } else if (value1 > value2) {
          return direction === 0 ? 1 : -1;
        } else {
          return 0;
        }
        
      }
    }
    
    return items.sort(compare);
   } 
   
   var items = [
  { name: 'Edward', value: 21 },
  { name: 'Sharpe', value: 37 },
  { name: 'And', value: 45 },
  { name: 'The', value: -12 },
  { name: undefined, value: -12 },
  { name: 'Magnetic', value: 13 },
  { name: 'Zeros', value: 37 }
];
   console.log('Ascending Order:- ');
   console.log(sort(items, 'name', 0));
   console.log('Decending Order:- ');
   console.log(sort(items, 'name', 1));

</div>