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Fixes #24 crash when keys were removed from a map #25

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Fixes #24 crash when keys were removed from a map #25

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6 changes: 3 additions & 3 deletions diff.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -306,7 +306,7 @@ abstract class DiffShowInstances2 extends DiffShowInstancesLowPriority {
val identical = left.keys.toList intersect right.keys.toList
val removed = left.keys.toList diff right.keys.toList
val added = right.keys.toList diff left.keys.toList
def show( keys: List[K] ) = keys.map( k => DiffShow.show( k ) -> DiffShow.show( right( k ) ) )
def show( keys: List[K], m: Map[K, V] ) = keys.map( k => DiffShow.show( k ) -> DiffShow.show( m( k ) ) )
val changed = for {
key <- left.keys.toList diff removed
Different( s ) <- DiffShow.diff( left( key ), right( key ) ) :: Nil
Expand All @@ -317,8 +317,8 @@ abstract class DiffShowInstances2 extends DiffShowInstancesLowPriority {
"Map",
identical.map( _ => None ) ++ Seq(
changed,
show( removed ).map( ( arrow _ ).tupled ).map( red ),
show( added ).map( ( arrow _ ).tupled ).map( green )
show( removed, left ).map( ( arrow _ ).tupled ).map( red ),
show( added, right ).map( ( arrow _ ).tupled ).map( green )
).flatten.map( s => Option( ( "", s ) ) )
)
if ( removed.isEmpty && added.isEmpty && changed.isEmpty )
Expand Down