how loop in scala
for ((name, count) <- names.zipWithIndex) {
println(s"$count is $name")
}
how loop in scala
for ((name, count) <- names.zipWithIndex) {
println(s"$count is $name")
}
how loop in scala
for (i <- 1 to 3) println(i)
how loop in scala
for {
i <- 1 to 10
if i < 4
} println(i)
how loop in scala
for (i <- 1 to 10 if i < 4) println(i)
how loop in scala
res: Seq[(Int, Char)] = List((1,a), (1,b), (1,c),
(2,a), (2,b), (2,c),
(3,a), (3,b), (3,c))
how loop in scala
ratings.foreach {
case(movie, rating) => println(s"key: $movie, value: $rating")
}
ratings.foreach(x => println(s"key: ${x._1}, value: ${x._2}"))
ratings.keys.foreach((movie) => println(movie))
ratings.keys.foreach(println)
ratings.values.foreach((rating) => println(rating))
how loop in scala
val lengths = for (e <- names) yield {
// imagine that this required multiple lines of code
e.length
}
how loop in scala
val nameMap = Map("firstName" -> "Ed", "lastName" -> "Chigliak")
for ((k,v) <- nameMap) {
println(s"key: $k, value: $v")
}
val result = for ((k,v) <- nameMap) yield {
s"key: $k, value: $v"
}
println(result)
how loop in scala
for {
i <- 1 to 10
if i > 3
if i < 6
if i % 2 == 0
} println(i)
how loop in scala
val out = for (e <- names) yield e.capitalize
val out = names.map(_.capitalize)
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