Java 面向对象和函数式编程的混合和scala的比较.pdf
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2022-07-02
10:34:10
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q
15.2.1
Scala
Scala
Integer
String
Java 8
Lambda
Scala
tweet
Java
def isJavaMentioned(tweet: String) : Boolean = tweet.contains("Java")
def isShortTweet(tweet: String) : Boolean = tweet.length() < 20
Scala
filter
Java
val tweets = List(
"I love the new features in Java 8",
"How's it going?",
"An SQL query walks into a bar, sees two tables and says 'Can I join you?'"
)
tweets.filter(isJavaMentioned).foreach(println)
tweets.filter(isShortTweet).foreach(println)
filter
def filter[T](p: (T) => Boolean): List[T]
Scala
Java
Lambda
Java
Scala
Scala
q
Java
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q
Java
Lambda
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