func PermanenceMapFromBits(bits data.Bitset) (pm *PermanenceMap) {
pm = NewPermanenceMap(bits.Len())
bits.Foreach(func(k int) {
pm.permanence[k] = pm.config.Initial
})
if pm.config.Initial > pm.config.Threshold {
pm.synapses.Or(bits)
}
return pm
}
func (g *DistalSegmentGroup) CreateUpdate(sIndex int, activeState data.Bitset, minSynapses int) *SegmentUpdate {
state := data.NewBitset(activeState.Len())
if sIndex >= 0 {
s := g.segments[sIndex]
state.ResetTo(s.Connected())
}
state.Or(activeState)
for num := state.NumSetBits(); num < minSynapses; num = state.NumSetBits() {
// TODO(tms): optimize.
indices := segmentRand.Perm(state.Len())[num:minSynapses]
state.Set(indices...)
}
return NewSegmentUpdate(sIndex, state)
}