将浮点数排序为自然数

Question

I have a comma separated float numbers.

 var example = "1.1, 1.10, 1.2, 3.1, 3.14, 3.5";

and I want to sort this float numbers like,

"1.1, 1.2, 1.10, 3.1, 3.5, 3.14"

actually in my case, the numbers which are after decimals will consider as a natural numbers, so 1.2 will consider as '2' and 1.10 will consider as '10' thats why 1.2 will come first than 1.10.

and suggestion or example would be great for me, thanks.

Actually I want to first sort the array on the basis of numbers which are before decimals :) then the above logic will run.

Answer 1

You can use .sort with custom compare function, like so

 var example = "1.1, 1.10, 1.2, 3.1, 3.14, 3.5"; var res = example.split(',').sort(function (a, b) { var result; a = a.split('.'), b = b.split('.'); while (a.length) { result = a.shift() - (b.shift() || 0); if (result) { return result; } } return -b.length; }).join(','); console.log(res); 

Answer 2

You need a custom sort function that first compares the numerical value before the decimal point, and then compare the numerical value after the decimal point in case they are equal.

example.split(", ").sort(function (a, b) {
    var aParts = a.split(".", 2);
    var bParts = b.split(".", 2);
    if (aParts[0] < bParts[0]) return -1;
    if (aParts[0] > bParts[0]) return 1;
    return aParts[1] - bParts[1]; // sort only distinguishes < 0, = 0 or > 0
}).join(", ");