Scala .init method example

scala class initialization
scala object initialization
scala constructor
case class scala initialization
static in scala
scala object type
scala companion object
scala private object

Can you please explain what init method performs with respect to below list i can see the result of new list says that last sequence is being omitted from the existing list.

val numbers = List(1, 2, 3, 4, 5)

val result = numbers.init
println(result)

.init and .last are the compliments to the .head and .tail methods.

val nums = List(1,2,3,4)

nums.head  //res0: Int = 1
nums.tail  //res1: List[Int] = List(2, 3, 4)

nums.init  //res2: List[Int] = List(1, 2, 3)
nums.last  //res3: Int = 4

Initialize variable in Scala Object through some method (similar to , Initialize variable in Scala Object through some method (similar to init method in class) object MyObject { var set: Set[String] = _ var map : Map[String, String] =_ var list: List[Integer] =_ init() def init() { // read external file and initialze variables set = .. map = .. list = .. } } Scala Set init() method with example The init() method is utilized to find all the elements of the set except the last one. Method Definition: def init: Set[A]


def init: List[A] which selects all elements except the last.

l: List[Int] = List(1, 2, 3, 4, 5, 6, 7, 8)

scala> l.last
res58: Int = 8

scala> l.init
res59: List[Int] = List(1, 2, 3, 4, 5, 6, 7)

Class initialization style guidance - Question, No need for an init/setup method unless you have init/setup code that Note that in your example, you could get the same behavior without the Scala Stack init() method with example In Scala Stack class , the init() method is utilized to return a new stack that consists of all the elements except the last one. Method Definition: def init: Stack[A]


scala> val testList = List(1,2,3,4,5)
 testList: List[Int] = List(1, 2, 3, 4, 5)

scala> testList.init
res0: List[Int] = List(1, 2, 3, 4)

scala> testList.last
res1: Int = 5

scala> testList.head
res2: Int = 1

scala> testList.tail
res3: List[Int] = List(2, 3, 4, 5)

Object Init, There are some weird cases in java, where the code looks like it will init properly, but won't. This happens more often in scala and can be hard to understand. Vals​  Scala init() operation is applicable to all types of Scala collections. init() Syntax def init: List[A] The initial part of the collection without its last element Scala List init() examples. In this init() example, we have created a list and applied init() method to take/collect part of the collection and eliminate the last element.


Scala class examples (constructors, case classes, parameters , This post contains a collection of examples of Scala classes and class properties. getProperty("user.home"); // define some methods def foo  Scala Map init() method with example The init() method is utilized to delete the last element of the map. It will return all the elements of the Map except the last one.


Scala Traits, When you do not initialize a method in a trait, then they are abstract, while In the above example, the method scala() was an abstract method,  Can you please explain what init method performs with respect to below list i can see the result of new list says that last sequence is being omitted from the existing list. val numbers = List(1,


Singleton Implementation: Scala · Ted Neward's Blog, Since Scala has some language syntactic sugar around “statics” that written using the method-style syntax, Scala will know how to resolve The earlier example uses the JVM's static-initializer facilities to create the Product instance. If the context demands that this initialization be deferred until the first  The correct technical way to think about this is that a Scala method name that ends with the : character is right-associative, meaning that the method comes from the variable on the right side of the expression. Therefore, with +: and ++:, these methods comes from the Seq that’s on the right of the method name. ML for Beginners.