Question

6

Sorting JSON (by specific element) alphabetically

rated 0 times [ 8] [ 2] / answers: 1 / hits: 47525 / 11 Years ago, tue, october 8, 2013, 12:00:00

I have some JSON that is formatted like:

places =[

     {

      city:Los Angeles,

      country:USA,

     },

     {

      city:Boston,

      country:USA,

     },

     {

      city:Chicago,

      country:USA,

     },

]

et cetera...

I am trying to sort this alphabetically BY CITY and am having trouble doing so. I believe the root of my issue seems to be determining the order of the characters (versus numbers). I've tried a simple:

    places.sort(function(a,b) {

     return(a.city) - (b.customInfo.city);

    });

yet, this subtraction doesnt know what to do. Can someone help me out?

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hanna

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2 Years ago

answered 11 Years ago tina · Accepted Answer

Unfortunately there is no generic compare function in JavaScript to return a suitable value for sort(). I'd write a compareStrings function that uses comparison operators and then use it in the sort function.

function compareStrings(a, b) {

  // Assuming you want case-insensitive comparison

  a = a.toLowerCase();

  b = b.toLowerCase();



  return (a < b) ? -1 : (a > b) ? 1 : 0;

}



places.sort(function(a, b) {

  return compareStrings(a.city, b.city);

})