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mgo.tools.Neighbours.scala Maven / Gradle / Ivy
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/*
* Copyright (C) 13/11/13 Romain Reuillon
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see .
*/
package mgo.tools
trait Neighbours {
def neighbours[A](distance: (A, A) => Double)(a: A, all: Seq[A], nb: Int): Seq[A] = {
val distances = all.map(distance(a, _))
(all zip distances).sortBy(_._2).take(nb).map(_._1)
}
}
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