BuboFlash - helps with learning

Do you want BuboFlash to help you learning these things? Or do you want to add or correct something? Click here to log in or create user.

Presentation
Question

Answer

Tags

#odersky-programming-in-scala-2ed #scala

Question

How can you simplify this code using closure to avoid passing query as an argument to filesMatching, where filesEnding is the public API client function?


def filesEnding(query: String) =
  filesMatching(query, _.endsWith(_))

def filesMatching(query: String,
    matcher: (String, String) => Boolean) = {
  for (file <- filesHere; if matcher(file.getName, query))
    yield file
}

Answer


def filesEnding(query: String) =
  filesMatching(_.endsWith(query))

def filesMatching(matcher: String => Boolean) =
  for (file <- filesHere; if matcher(file.getName))
    yield file

Tags

#odersky-programming-in-scala-2ed #scala

Question

How can you simplify this code using closure to avoid passing query as an argument to filesMatching, where filesEnding is the public API client function?


def filesEnding(query: String) =
  filesMatching(query, _.endsWith(_))

def filesMatching(query: String,
    matcher: (String, String) => Boolean) = {
  for (file <- filesHere; if matcher(file.getName, query))
    yield file
}

Answer


def filesEnding(query: String) =
  filesMatching(_.endsWith(query))

def filesMatching(matcher: String => Boolean) =
  for (file <- filesHere; if matcher(file.getName))
    yield file

If you want to change selection, open document below and click on "Move attachment"

pdf

cannot see any pdfs

Summary

status	not learned	measured difficulty	37% [default]	last interval [days]
repetition number in this series	0	memorised on		scheduled repetition
scheduled repetition interval		last repetition or drill

Details

No repetitions

Discussion

Do you want to join discussion? Click here to log in or create user.