Merge.go

func Merge(ldata []float64, rdata []float64) (result []float64) {
	result = make([]float64, len(ldata)+len(rdata))
	lidx, ridx := 0, 0

	for i := 0; i < cap(result); i++ {
		switch {
		case lidx >= len(ldata):
			result[i] = rdata[ridx]
			ridx++
		case ridx >= len(rdata):
			result[i] = ldata[lidx]
			lidx++
		case ldata[lidx] < rdata[ridx]:
			result[i] = ldata[lidx]
			lidx++
		default:
			result[i] = rdata[ridx]
			ridx++
		}
	}
	return
}