Scala Collections: Use the Set value to find the key from the Map object.
This is a scala question.
I currently have the following two collection objects:
val keywordLookup = Map("a" -> "1111",
"b" -> "2222",
"c" -> "3333",
"d" -> "4444",
"e" -> "5555")
val keywordList = Set("1111", "3333")
The Lookup keyword is a search object. The List keyword contains a list of values that I need to find the ids from the keywordLookup object.
I would like to get the following result:
Map("a" -> "1111", "c" -> "3333")
+3
user422930
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3 answers
val filtered = keywordLookup.filter(kv => keywordList.contains(kv._2))
filtered
is Map
which you want as output
+2
jithinpt
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keywordLookup.filter(x => keywordList.contains(x._2))
+2
Arne Claassen
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Using flatMap
on find
,
keywordList.flatMap (k => keywordLookup.find( _._2 == k)).toMap
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elm
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