View Time.scala
def time[T](block: => T): T = {
val start = System.currentTimeMillis
val res = block
val totalTime = System.currentTimeMillis - start
println("Elapsed time: %1d ms".format(totalTime))
View Mail.scala
package object mail {
implicit def stringToSeq(single: String): Seq[String] = Seq(single)
implicit def liftToOption[T](t: T): Option[T] = Some(t)
sealed abstract class MailType
case object Plain extends MailType
case object Rich extends MailType
case object MultiPart extends MailType
View JsonFormats.scala
package json
import reactivemongo.bson._
import reactivemongo.bson.handlers.DefaultBSONHandlers._
import play.api.libs.json._
import play.api.libs.json.Json._
import play.api.libs.json.util._
import play.api.libs.json.Writes._
import play.api.libs.functional.syntax._
View togglewatch.js
var toggleWatch = function(watchExpr, fn) {
var watchFn;
return function() {
if (watchFn) {
watchFn = undefined;
console.log("Disabled " + watchExpr);
} else {
watchFn = $scope.$watch(watchExpr, fn);
console.log("Enabled " + watchExpr);
# Separate functions
success = (data, status, header) ->
promise.resolve data.user
error = (data, status, header) ->
promise.reject data.error
user = getUserById id, success, error
# Comma in front of each function
user = getUserById id
View 1Problem.scala
// Adding new functionality via inheritance leads to combinatorial explanation
abstract class Serializer {
def write(string: String): Unit
class CsvFileWriter extends FileWriter {
def writeFile(file: = //...
View Twitter.scala
package controllers
import play.api._
import play.api.mvc._
import play.api.libs.oauth._
import play.api.libs.iteratee._
object Twitter extends Controller {
View Routes1
# Map to language via RegEx
/$language<[a-z]{2}>/videos/:id controllers.Video.showVideo(id: Long, language: String)
# Hard-code supported languages
/de/videos/:id controllers.Video.showVideo(id: Long, language = "de")
/en/videos/:id controllers.Video.showVideo(id: Long, language = "en")
View Helper.scala
package views.html.helper
import play.api.templates.Html
// Executes the first block if non-empty, the second otherwise
// Passes the entire seq (as in defining)
object ifEmptyOrElse {
def apply[T <: Seq[_]](t: T)(nonEmptyBlock: (T) => Html)(emptyBlock: => Html) = {
if (t.nonEmpty) nonEmptyBlock(t) else emptyBlock
View Helper.scala
package views.html.helper
import play.api.templates.Html
object definingNonEmpty {
def apply[T <: Seq[_]](t: T)(block: (T) => Html) = {
if (t.nonEmpty) block(t) else Html("")