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This method is used to create the index for the element.Points to remember while working with zipwithindex method in Scala It will return us the new tuple without modified the existing collection in Scala. So in this manner, it works in Scala by the use of this we can directly access the list element without being them iterate. In the above output as you can see it has created an extra variable with the element of the list. For example, the sample output will look like this see below Į.g. So once we print out the output we will see it will create an index for every element present in the list. But in Scala, we have the zipWithIndex method available so we can call this method directly on the collection, as you can see on the next line we are calling zipWithIndex with the collection variable name.
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After this, we are trying to bind these elements with the index but this is not an easy task to do if we do not have the zipWithIndex method available we need to write so many lines of code to achieve this functionality. We can assign any number of elements inside the list. Here we are creating a list that contains some elements inside it.
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This is the basic example to use zipWithIndex in our program to create an index for our collection. Val zipWithIndexMyList = mylist.zipWithIndex Now let’s see how we can create a new tuple by using the zipWithIndex method on the collection see below: This method is the member function of zipWithIndex class in Scala which has multiple super types which are as follows Let’s see below for better understanding see below ġ) def zipWithIndex: Iterable: This is the signature of zipWithIndex method in Scala given by the Scala doc. Now we will discuss the complete signature of this method in detail how it looks and what does it return. One more important thing about the zipwithindex method is that it always returns a new collection in Scala without being modified the existing collection on which we are calling it.Īs we all know by the use of indexing searching and accessing of elements became easy and hence increase the performance of the program as well. This is can also access the element by using their index. With the help of these methods each and, every element present inside our collection got associated with an index. This method helps us to create and generate the index of the mutable and immutable collection in Scala. How zipwithindex Method works in Scala?Īs now we know that zipwithindex method is used to deal with the indexing of the list element. In the coming section, we will see a practice example of how we can use this in our programming to maintain the index in a collection data structure in Scala. Val myzicollection: Seq = collection_name.zipWithIndex Let’s see the syntax for zipwithindex method how we can use this in programming see below ġ) In this, we are calling foreach method with zipWithIndex, but we have mentioned the collection as well at the starting.Ģ) In this syntax we are also creating a zipWithIndex by calling the zipWithIndex on the collection. Zipwithindex method can be directly used on the immutable and immutable collection in scala and this method will give us a new tuple always with all the elements of the collection is bind with index.
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