I have an Array with decreasing even numbers:
var a = [20, 18, 10, 8, 6, 4, 2, 0]
When I call a.sort() , it returns the following:
[0, 10, 18, 2, 20, 4, 6, 8]
This ordering is not correct. How can I sort in ascending order correctly?
You need to pass the comparison function:
var a = [20, 18, 10, 8, 6, 4, 2, 0]
a.sort( (a,b) => a - b );
console.log(a);The reason for this is:
If Comparison function is not informed, the elements will be sorted according to their conversion to text and the comparative text in the unicode punctuation of the converted text. For example, "cherry" comes before of banana". In a numerical order, 9 comes before 80, but because numbers are converted to text, and "80" comes before "9" in the Unicode ordering.