Case scala how to#

In such case instead of providing all parameters I can simple copy objSmith which has most of the information and only change the name parameter.

Now I need to add another student Mike who is same age as Smith and comes from same country Canada. ObjSmith: student = student(Smith,23,Canada) Scala> val objSmith = student('Smith',23,'Canada') scala> case class student(name:String, age:Int, country :String) Lets say we have a student class and we need to create 2 student objects for the same.

CASE CLASS COPY METHODĬase Class has a built in copy method which can 1)Copy an Object 2)Modify one or more fields during the copy process. Remember, you can create your own apply method with the same number of parameters as the case class and Scala would override your apply method with default one. A companion object like below is created automaticallyĭef apply(name:String, age:Int) = new student (name, age) Lets check this with an example case class student (name:String, age:Int) So as discussed before you can create an instance of case class without using the ‘new’ keyword. When you create a case class, Scala creates a companion object by default with an APPLY METHOD having the same parameters as the case class. Lets understand this more in our next topic. Also notice that when i create an instance p1 i did not have to use keyword ‘new’, this is because Scala Case Class has an apply method by default. In the above example you see that because the parameter is val i can get the values but cannot set any value. Introduction to the Genitive Case in German Different ways of creating delta table in Databricks.Spark Escape Double Quotes in Input File.Spark UDF to Check Count of Nulls in each column.Spark Function to check Duplicates in Dataframe.correct column order during insert into Spark Dataframe.

Case scala how to#

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