{"id":17039,"date":"2018-05-31T04:30:07","date_gmt":"2018-05-31T04:30:07","guid":{"rendered":"https:\/\/data-flair.training\/blogs\/?p=17039"},"modified":"2021-12-04T10:15:38","modified_gmt":"2021-12-04T04:45:38","slug":"scala-currying-function","status":"publish","type":"post","link":"https:\/\/data-flair.training\/blogs\/scala-currying-function\/","title":{"rendered":"Scala Currying Function – Example & Partially Applied Function"},"content":{"rendered":"

Today, we will learn about Scala currying functions. Moreover, we will discuss advantages of currying in Scala Programming Language<\/strong><\/a> and how to call a scala currying function. Along with this, we will study Scala Currying vs partially applied functions. In addition, we will look at an example of Scala Currying Function.<\/p>\n

So, let’s see the Scala Currying Function Tutorial.<\/p>\n

What is Scala Currying Function?<\/h3>\n

Through Scala\u00a0curry function, we can split a list with multiple parameters into a chain of functions-each with one parameter. This means we define them with more than one parameter list.
\nFollow this link to know about Scala String Method with Syntax and Method<\/a><\/strong><\/p>\n

A Syntax of Scala Currying Function:<\/strong><\/p>\n

We use the following syntax to carry out currying:<\/p>\n

def multiply(a:Int)(b:Int)=a*b<\/pre>\n
Another way we can do this is:<\/p>\n
def multiply(a:Int)=(b:Int)=>a*b<\/pre>\n
Calling Scala Function<\/h3>\n
To make a call to Scala function, then, we call it passing parameters in multiple lists:
\nmultiply(3)(4)<\/p>\n
Partially Applied Functions<\/h3>\n
An important concept to discuss here is partially applied functions. When we apply a function to some of its arguments, we have applied it partially. This returns a partially-applied function that we can use later. Let\u2019s take an example.<\/p>\n
scala> def multiply(a:Int)(b:Int)(c:Int)=a*b*c\r\nmultiply: (a: Int)(b: Int)(c: Int)Int\r\nscala> var mul=multiply(2)(3)(_)\r\nmul: Int => Int = $$Lambda$1122\/1609544540@4f92ded0<\/pre>\n
Here, the underscore is a placeholder for a missing value.<\/p>\n
scala> mul(4)\r\nres11: Int = 24<\/pre>\n
Let’s Explore Scala Functions in detail<\/a><\/strong>
\nWell, this works too:<\/p>\n
scala> var mul=multiply(2)(3)_\r\nmul: Int => Int = $$Lambda$1173\/256443308@207ceea4\r\nscala> mul(4)\r\nres12: Int = 24<\/pre>\n
Example of Scala Currying Function<\/h3>\n
Example – 1<\/strong>
\nLet\u2019s begin with Scala Currying Function example.<\/p>\n
scala> class Add{\r\n| def sum(a:Int)(b:Int)={\r\n| a+b}\r\n| }\r\ndefined class Add\r\nscala> var a=new Add()\r\na: Add = Add@53cba89f\r\nscala> a.sum(3)(4)\r\nres4: Int = 7<\/pre>\n
Example – 2<\/strong>
\nRemember the other piece of syntax we looked at ?\u00a0Let\u2019s try defining a function that way, but with three arguments.<\/p>\n
scala> class Concatenate{\r\n| def strcat(s1:String)(s2:String)=(s3:String)=>s1+s2+s3\r\n| }\r\ndefined class Concatenate\r\nscala> var c=new Concatenate()\r\nc: Concatenate = Concatenate@5d55eb7a\r\nscala> c.strcat(\"Hello\")(\"World\")(\"How are you?\")\r\nres7: String = HelloWorldHow are you?<\/pre>\n
Do you know about Scala Exceptions and Exception Handling<\/a><\/strong><\/p>\n
Advantages of Currying Function in Scala<\/h3>\n
Here, we will discuss\u00a0the advantages of Currying in Scala, let’s discuss them:<\/p>\n
    \n
  1. One benefit is that Scala currying makes creating anonymous functions easier.<\/li>\n
  2. Scala Currying also makes it easier to pass around a function as a first-class object. You can keep applying parameters when you find them.<\/li>\n<\/ol>\n
    So, this was all about Scala Currying Function. Hope you like our explanation.<\/p>\n
    Conclusion<\/h3>\n
    Hence, using the concept of partial functions, we use curry functions in Scala. This lets us split a list of multiple parameters into a chain of functions. Drop your queries in the comments.<\/p>\n
    Related topic –\u00a0Scala File i\/o: Open, Read and Write a File in Scala<\/a><\/strong><\/p>\n
    For reference<\/a><\/strong>
    Today, we will learn about Scala currying functions. Moreover, we will discuss advantages of currying in Scala Programming Language and how to call a scala currying function. Along with this, we will study Scala...<\/p>\n","protected":false},"author":6,"featured_media":17045,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[61],"tags":[374,4334,4632,12429,12430,12431,14100],"class_list":["post-17039","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-scala","tag-advantages-of-scala-currying","tag-example-of-scala-currying","tag-features-of-scala-currying","tag-scala-currying-functions","tag-scala-currying-syntax","tag-scala-currying-vs-partially-applied","tag-syntax-of-scala-currying"],"yoast_head":"\nScala Currying Function - Example & Partially Applied Function - DataFlair<\/title>\n<meta name=\"description\" content=\"Scala Currying tutorial- What is Scala Currying Function, Scala Currying vs partially applied function, Benefits & Example of Currying Function in Scala\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/data-flair.training\/blogs\/scala-currying-function\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Scala Currying Function - 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