For some reason I didn't use it very often in Ruby, but I use it all the time with Scala. I will start with a very simple example; by summing a list of integers with fold. We will learn about the drop method with syntax and examples. This is actually a trick question, because you can't add elements to a Scala List; it's an immutable data structure, like a Java String.. Prepending elements to Scala Lists. For scala, this is here. Submitted by Shivang Yadav, on December 04, 2020 . Removing an element from a list in Scala. drop(n): This method drops the first n elements and returns the rest of the elements as a list. scala> triplets drop 2 res7: List[String] = List(ghi, jkl) take – “xs take n” returns the first n elements of the list xs; scala> triplets take 2 res8: List[String] = List(abc, def) Note: If n is greater than xs.length, the whole list xs is returned. With ++ you can append any collection to List, which is terrible: scala> List(1, 2, 3) ++ "ab" res0: List[AnyVal] = List(1, 2, 3, a, b) ++ is also easy to mix up with +: scala> List(1, 2, 3) + "ab" res1: String = List… To do that, you first need to remove the underscore character at the beginning of each name, and then capitalize each name. Here, we will learn about BitSet drop() method in Scala.It is used to drop elements from the BitSet. GitHub Gist: instantly share code, notes, and snippets. Scala List FAQ: How do I add elements to a Scala List?. BitSet in Scala is a special collection of positive integers. def drop(n: Int): List[A] Here, n is the number of elements to be dropped from the list. Set also has the method you want: To remove the underscore from each name, you call drop(1) on each String. This method returns the all the elements of list except first n ones. Functional Programming in Scala Exercises. drop() method is method used by List to select all elements except first n elements of the list. Usage Spell methods and variables in lower camel case: drop_Val_In_List drop_Val_List_In_List in_ls Use the most appropriate data structure. val numbers = List(5, 4, 8, 6, 2) numbers.fold(0) { (z, i) => a + i } // result = 25 The fold method for a List takes two arguments; the start value and a function. Imagine that you want to create a new list that has the capitalized names of each person. The following is the syntax of drop method. scala> abcde take 2 res8: List[Char] = List(a, b) scala> abcde drop 2 res9: List[Char] = List(c, d, e) scala> abcde splitAt 2 res10: (List[Char], List[Char]) = (List(a, b),List(c, d, e)) Element selection: apply and indices. A List is immutable, so you can’t delete elements from it, but you can filter out the elements you don’t want while you assign the result to a new variable:. Removing an element from a list in Scala December 8, 2019 December 8, 2019 Sai Gowtham Badvity Scala List, removing an element, Scala. Syntax. To me, it seems like you want a set, not a sequence/list. This method return first n elements as a list.