<p>In <a href="https://github.com/mlpack/mlpack/pull/686#discussion_r69383800">src/mlpack/methods/ne/neat.hpp</a>:</p>
<pre style='color:#555'>&gt; +    return true;
&gt; +  }
&gt; +
&gt; +
&gt; +  // Initialize population.
&gt; +  void InitPopulation() {
&gt; +    aPopulation = Population(aSeedGenome, aPopulationSize);
&gt; +  }
&gt; +
&gt; +  // Reproduce next generation of population.
&gt; +  void Reproduce() {
&gt; +    // keep best genome.
&gt; +    Genome lastBestGenome = aPopulation.BestGenome();
&gt; +
&gt; +    // Remove stale species.
&gt; +    if (aPopulation.aSpecies.size() &gt; 10) {
</pre>
<p>I think it's a good idea to provide a parameter for the number of stale species.</p>

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