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In ML, one can assign names for each element of a matched pattern:
fun findPair n nil = NONE
| findPair n (head as (n1, _))::rest =
if n = n1 then (SOME head) else (findPair n rest)
In this code, I defined an alias for the first pair of the list and matched the contents of the pair. Is there an equivalent construct in Scala?
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This is because, thanks to its functional nature, it is a more common choice when it comes to building powerful applications that need to cooperate with a vast amount of data. Moreover, thanks to tools like Spark, Scala itself is becoming the number one choice for creating modern machine learning models.
Some of the basic Scala constructs are expressions, blocks, classes, objects, functions, methods, traits, Main methods, fields, and closures. 1. Scala Expression: A computable statement in Scala is known as expression.
Scala's name implies that it is a scalable programming language. It was created in 2003 by Martin Odersky and his research team. These days we widely use Scala in Data Science and Machine Learning fields. Scala is a small, fast, and efficient multi-paradigm programming language built on a compiler.
Scala is a highly scalable integration of object-oriented nature and functional programming concepts that make it easy to build scalable and complex big data applications.
You can do variable binding with the @ symbol, e.g.:
scala> val wholeList @ List(x, _*) = List(1,2,3)
wholeList: List[Int] = List(1, 2, 3)
x: Int = 1
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