Trying to get the highest and lowest value from an array that I know will contain only integers seems to be harder than I thought.
I'd expect this to show 99, 104, 140000
. Instead it shows 104, 140000, 99
. So it seems the sort is handling the values as strings.
Is there a way to get the sort function to actually sort on integer value?
By default, the sort method sorts elements alphabetically. To sort numerically just add a new method which handles numeric sorts (sortNumber, shown below) -
var numArray = [140000, 104, 99];
numArray.sort(function(a, b) {
return a - b;
});
console.log(numArray);
In ES6, you can simplify this with arrow functions:
numArray.sort((a, b) => a - b); // For ascending sort
numArray.sort((a, b) => b - a); // For descending sort
Documentation:
Mozilla Array.prototype.sort()
recommends this compare function for arrays that don't contain Infinity or NaN. (Because Inf - Inf
is NaN, not 0).
Also examples of sorting objects by key.