Question

I need to return the position of the element closest to zero without being a negative number.

I have 4 roll sizes(in”) to cut film from. I’m trying to enter a width variable and subtract from the elements of the array and the closest to 0 will return the array position of the best roll size. I hope this makes sense. Thanks.

  var width = ""

var rollArray = [36, 48, 60, 72]
            var newArray = []
            for(i in rollArray){ newArray.push ((rollArray[i]) - width) }

alert(newArray);

returns width minus each element, now I need to find how to return the lowest values array position so that I can get the roll size from the equivalent rollArray position.

Answer 1

var width = 41;
var rollArray = [36, 48, 60, 72];
var closest = rollArray.filter(function(ele){return ele-width >= 0}).sort()[0];