A species object

species.go

package main

import (
	"fmt"
	"io"
	"os"
)

type Species struct {
	Name string // Name of the species (dah!)
	IsProducer bool // True if the species is a primary producer
	Subpops uint // Number of subpopulations (the order of the spatial network).
	N, C, R float64 // Niche value.
	Group []uint // The group for each subpopulations
}

func (s *Species) ToXML(w io.Writer) {
	fmt.Fprintf(w, "<species>\n")
	fmt.Fprintf(w, "   <name>%s</name>\n", s.Name)
	fmt.Fprintf(w, "   <producer>%t</producer>\n", s.IsProducer)
	fmt.Fprintf(w, "   <subpops>%d</subpops>\n", s.Subpops)
	fmt.Fprintf(w, "   <n>%.4f</n>\n", s.N)
	fmt.Fprintf(w, "   <c>%.4f</c>\n", s.C)
	fmt.Fprintf(w, "   <r>%.4f</r>\n", s.R)
	fmt.Fprintf(w, "</species>\n")
}

func (s *Species) Pops() bool {
	sum := 0
	for i := 0; i < s.Subpops; i++ {
		if s.Group[i] > 0 {
			sum++
		}
	}
	return sum
}

func (s *Species) IsExtinct() bool {
	for i := 0; i < s.Subpops; i++ {
		if s.Group[i] > 0 {
			return false
		}
	}
	return true
}

func (s *Species) IsExtant() bool {
	for i := 0; i < s.Subpops; i++ {
		if s.Group[i] > 0 {
			return true
		}
	}
	return false
}

func main() {
	s := new(Species)
	s.Name = "竜"
	s.IsProducer = false // Let's be serious for a moment: it's a dragon!
	s.Subpops = 5
	s.N = 0.97648
	s.C = 0.829111
	s.R = 0.32
	s.ToXML(os.Stdout)
}