[Scala] String Interpolation

Scala 2.10.0에 추가된 String Interpolation 예제 입니다.

val name = "moonsun"

val msg = s"My name is $name"

println(msg)

==> My name is moonsun

문자열 변수를 $연산자로 문자열 내부에서 바로 사용할 수 있는 기능임.

"s"를 String Interpolator라고 함.

Starting in Scala 2.10.0, Scala offers a new mechanism to create strings from your data: String Interpolation. 

String Interpolation allows users to embed variable references directly in processed string literals

printf 처럼 사용할 수 있는 f Interpolator도 있음

The f Interpolator

Prepending f to any string literal allows the creation of simple formatted strings, similar to printfin other languages. When using the f interpolator, all variable references should be followed by a printf-style format string, like %d. Let’s look at an example:

val height = 1.9d
val name = "James"
println(f"$name%s is $height%2.2f meters tall")  // James is 1.90 meters tall