println("Step 1: How to create a wrapper String class which will extend the String type")
class DonutString(s: String) {
def isFavoriteDonut: Boolean = s == "Glazed Donut"
}
println("\nStep 2: How to create an implicit function to convert a String to the wrapper String class")
object DonutConverstions {
implicit def stringTodonutString(s: String) = new DonutString(s)
}
println("\nStep 3: How to import the String conversion so that it is in scope")
import DonutConverstions._
println("\nStep 4: How to create String values")
val glazedDonut = "Glazed Donut"
val vanillaDonut = "Vanilla Donut"
println("\nStep 5: How to access the custom String function called isFavaoriteDonut")
println(s"Is Glazed Donut my favorite Donut = ${glazedDonut.isFavoriteDonut}")
println(s"Is Vanilla Donut my favorite Donut = ${vanillaDonut.isFavoriteDonut}")
result
Step 1: How to create a wrapper String class which will extend the String type Step 2: How to create an implicit function to convert a String to the wrapper String class Step 3: How to import the String conversion so that it is in scope Step 4: How to create String values Step 5: How to access the custom String function called isFavaoriteDonut Is Glazed Donut my favorite Donut = true Is Vanilla Donut my favorite Donut = false
版权声明：本文内容由互联网用户自发贡献，该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容， 请发送邮件至 [email protected] 举报，一经查实，本站将立刻删除。
