![]() ![]() SCALA TUPLE CODEExecutes the code in body with an exclusive lock on this. It is immutable and used when there is a need to return multiple values from methods. Executes the code in body with an exclusive lock on this. In Scala, a tuple is used to store fixed and different types of distinct data. final def synchronized T0 ( arg0: > T0): T0. Try the following example program to swap the elements. a new Tuple where the first element is the second element of this Tuple and the second element is the first element of this Tuple. You can use Tuple.swap method to swap the elements of a Tuple2. Scala Tuples JWhat is a Tuple A tuple is an ordered container of two or more values, all of which may have different types. The following commands are used to compile and execute this program. Println("Concatenated String: " + t.toString() ) Try the following example program to convert to String. You can use Tuple.toString() method to concatenate all the elements of the tuple into a string. Try the following example program to iterate over tuples. You can use Tuple.productIterator() method to iterate over all the elements of a Tuple. For each TupleN type, where 1 scalac Demo.scala There currently is an upper limit of 22 in the Scala if you need more, then you can use a collection, not a tuple. Tuples are of type Tuple1, Tuple2, Tuple3 and so on. Thus, the type of (99, "Luftballons") is Tuple2. The actual type of a tuple depends upon the number and of elements it contains and the types of those elements. Which is syntactic sugar (short cut) for the following − The following is an example of a tuple holding an integer, a string, and the console. Unlike an array or list, a tuple can hold objects with different types but they are also immutable. Scala tuple combines a fixed number of items together so that they can be passed around as a whole. Scala Collections - Multi-Dimensional Array.In Java, when it would be convenient to be able to return multiple values from a method, the typical workaround is to return those values in a one-off “wrapper” class. Scala> val (symbol, currentPrice, bidPrice) = getStockInfo Running this example in the REPL demonstrates how this works: Val (symbol, currentPrice, bidPrice) = getStockInfo Then call that method and assign variable names to the expected return values, enclosing your variable names in parentheses: To demonstrate this, first define a method that returns a tuple: SolutionĪlthough you can return objects from methods just as in other OOP languages, Scala also lets you return multiple values from a method using tuples. You want to return multiple values from a Scala function, but don’t want to wrap those values in an artificial, makeshift class. This is Recipe 5.5, “How to define Scala methods and functions that returns multiple items (tuples).” Problem This is an excerpt from the Scala Cookbook (partially modified for the internet). ![]() For tuples of size 2 (also called a 'pair') there's an arrow syntax. Click here to know more about mutability and immutability. A tuples purpose is to combine a fixed and finite number of items together to allow the programmer to pass a tuple as a whole. A tuple can be defined using parentheses. In Scala, a tuple is a class that gives us a simple way to store heterogeneous items or different data types in the same container. ![]() show more info on classes/objects in repl A tuple is a heterogeneous collection of two to twenty-two values. ![]()
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