Javascript - sorting arrays containing positive and negative "decimal" numbers

Question

I originally had the following callback passed as a parameter to the javascript array sort() function:

function sortNumber(a,b) {
return a-b;
}

However this doesn't work when my array contains positive and negative decimal numbers (i.e. -107.578, 97.453 etc.) How would I modify this to sort properly?

This callback function will sort an array of decimal numbers in ascending numerical order. Did you want it to do something different? — Chris Shouts
– Chris Shouts, Commented Jun 2, 2010 at 19:50

nuffGigs · Accepted Answer · 2010-06-02 19:53:49Z

14

I don't see any problems with that function. Here's my test code:

var nums = [10, 5, 40, 25, -3412,4212, -107.578, 97.453];

function sortNumber(a,b){
   return a - b;
}

alert( nums.sort(sortNumber) );

Can you show some more of your code? It might be a problem with the array.

answered Jun 2, 2010 at 19:53

nuffGigs

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1 Comment

hhj Over a year ago

sorry my fault, careless error in my code. this does work fine.

Abeer Mousa · Accepted Answer · 2023-04-24 18:31:48Z

0

nums.sort(function(a, b) {
           if (a < 0 && b < 0  || a > 0 && b > 0) {
              return a-b; 
            } else if (a < 0) {
              return -1; 
            } else if (b < 0) {
             return 1; 
            } 
           });

answered Apr 24, 2023 at 18:31

Abeer Mousa

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1 Comment

Community Over a year ago

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