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• MapExtensions.scala

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io.getquill.codegen.util.MapExtensions.scala Maven / Gradle / Ivy

package io.getquill.codegen.util

import scala.collection.immutable.{ListMap, ListSet}

object MapExtensions {

  implicit final class MapOps[K, V](private val m: Map[K, V]) extends AnyVal {
    def zipOnKeys(o: Map[K, V]): Map[K, (Option[V], Option[V])]            = zipMapsOnKeys(m, o)
    def zipOnKeysOrdered(o: Map[K, V]): ListMap[K, (Option[V], Option[V])] = zipMapsOnKeysOrdered(m, o)
  }

  def zipMapsOnKeys[K, V](one: Map[K, V], two: Map[K, V]): Map[K, (Option[V], Option[V])] =
    (for (key <- one.keys ++ two.keys)
      yield (key, (one.get(key), two.get(key)))).toMap

  def zipMapsOnKeysOrdered[K, V](one: Map[K, V], two: Map[K, V]): ListMap[K, (Option[V], Option[V])] = {
    val outList =
      (for (key <- (ListSet() ++ one.keys.toSeq.reverse) ++ (ListSet() ++ two.keys.toSeq.reverse))
        yield (key, (one.get(key), two.get(key))))
    (new ListMap() ++ outList.toSeq.reverse)
  }
}