Remove species that no longer have any organisms.

Justus Winter · Justus Winter · commit 1784757f13dc · 2020-05-04T13:38:55.000+02:00
Fixes TLmaK0#19.
diff --git a/src/population.rs b/src/population.rs
@@ -172,6 +172,9 @@ impl Population {
                 self.species.push(new_specie.unwrap());
             }
         }
+
+        // Remove species that no longer have any organisms.
+        self.species.retain(|s| ! s.organisms.is_empty());
     }
 
     fn create_organisms(&mut self, population_size: usize) {

Original file line number	Diff line number	Diff line change
`@@ -172,6 +172,9 @@ impl Population {`
`172`	`172`	`self.species.push(new_specie.unwrap());`
`173`	`173`	`}`
`174`	`174`	`}`
	`175`	`+`
	`176`	`+ // Remove species that no longer have any organisms.`
	`177`	`+ self.species.retain(\|s\| ! s.organisms.is_empty());`
`175`	`178`	`}`
`176`	`179`
`177`	`180`	`fn create_organisms(&mut self, population_size: usize) {`