gistfile1.txt

func getImageAspectRatio(height, width int) string {
	var distance float64
	var ratio string
	r := float64(width) / float64(height)
	distance = math.Abs(r - (16.0 / 9.0))
	ratio = "16by9"

	if r == 1.0 {
		ratio = "1by1"
		return ratio
	}
	if width > height {
		if math.Abs(r-(5.0/4.0)) < distance {
			distance = math.Abs(r - (5.0 / 4.0))
			ratio = "5by4"
		}
		if math.Abs(r-(4.0/3.0)) < distance {
			distance = math.Abs(r - (4.0 / 3.0))
			ratio = "4by3"
		}
		if math.Abs(r-(3.0/2.0)) < distance {
			distance = math.Abs(r - (3.0 / 2.0))
			ratio = "3by2"
		}
		if math.Abs(r-(5.0/3.0)) < distance {
			distance = math.Abs(r - (5.0 / 3.0))
			ratio = "5by3"
		}
		if math.Abs(r-(3.0/1.0)) < distance {
			distance = math.Abs(r - (3.0 / 1.0))
			ratio = "3by1"
		}
	} else {
		if math.Abs(r-(4.0/5.0)) < distance {
			distance = math.Abs(r - (4.0 / 5.0))
			ratio = "4by5"
		}
		if math.Abs(r-(3.0/4.0)) < distance {
			distance = math.Abs(r - (3.0 / 4.0))
			ratio = "3by4"
		}
		if math.Abs(r-(2.0/3.0)) < distance {
			distance = math.Abs(r - (2.0 / 3.0))
			ratio = "2by3"
		}
		if math.Abs(r-(3.0/5.0)) < distance {
			distance = math.Abs(r - (3.0 / 5.0))
			ratio = "3by5"
		}
		if math.Abs(r-(9.0/16.0)) < distance {
			distance = math.Abs(r - (9.0 / 16.0))
			ratio = "9by16"
		}
		if math.Abs(r-(1.0/2.0)) < distance {
			distance = math.Abs(r - (1.0 / 2.0))
			ratio = "1by2"
		}
		if math.Abs(r-(1.0/3.0)) < distance {
			distance = math.Abs(r - (1.0 / 3.0))
			ratio = "1by3"
		}
	}

	return ratio
}