The “exists” method checks to see if a value is in a list of values:<\/p>\n
\nRange(1, 10).\n exists(\n x => x.equals(2)\n )\n<\/pre>\nIf you make the list into a view, “exists” will only load items from the view until it finds a value, as seen here:<\/p>\n
\nRange(1, 10).\n view.\n map(x => \n if (x < 5) x else ???\n ).\n exists(\n x => x.equals(2)\n )\n<\/pre>\nYou can also simplify this and check for values like “None”:<\/p>\n
\nList(1, 2, None).exists(_.equals(None))\n\nres155: Boolean = true\n<\/pre>\n","protected":false},"excerpt":{"rendered":"The “exists” method checks to see if a value is in a list of values: Range(1, 10). exists( x => x.equals(2) ) If you make the list into a view, “exists” will only load items from the view until it finds a value, as seen here: Range(1, 10). view. map(x => if (x < 5) … \n\n