2009 6 28

•
•
•
•
2009 6 28

•
•
•
•
•
•
2009 6 28

2009 6 28

2009 6 28

2009 6 28

2009 6 28

2009 6 28

2009 6 28

2009 6 28

2009 6 28

2009 6 28

2009 6 28

2009 6 28

•
•
•
•
•
2009
•
6 28

2009 6 28

2009 6 28

•
•
•
•
2009 6 28

•
2009 6 28

2009 6 28

2009 6 28

•
•
•
•
•
2009 6 28

•
•
•
•
•
2009 6 28

2009 6 28

2009 6 28

scala> val list:List[Int] = List(1,2,3,4)
list: List[Int] = List(1, 2, 3, 4)
scala> val list = List(1,2,3,4)
list: List[Int] = List(1, 2, 3, 4)
2009 6 28

scala> def isEven(i:Int):Boolean = {
return ( i % 2 == 0 )
}
isEven: (Int)Boolean
scala> def isEven(i:Int) = i % 2 == 0
isEven: (Int)Boolean
scala> val func = isEven _
func: (Int) => Boolean = <function>
2009 6 28

scala> def add(n:Int)(m:Int)=n+m
add: (n: Int)(m: Int)Int
scala> val add3 = add( 3 ) _
add3: (Int) => Int = <function>
scala> def curryingAdd( n:Int ) = add( n ) _
curryingAdd: (Int)(Int) => Int
2009 6 28

scala> l.map( {(n:Int) => n * 2} )
res1: List[Int] = List(2, 4, 6, 8)
scala> list.filter( _ % 2 == 0 )
res2: List[Int] = List(2, 4)
scala> list.filter( func )
res3: List[Int] = List(2, 4)
2009 6 28

def test[T](list:List[T]) = list match {
case 1::xs => print("start 1")
case 2::xs => print("start 2")
case "Test"::xs => print("start Test")
case x::Nil => print("one elemnt")
case x::xs => print("start " + x )
case _ => print("default")
}
2009 6 28

scala> class Foo( val n:Int, val s:String ){
def bar = print( n + s )
}
defined class Foo
scala> object FooObj{
val n = 3
val s = "Bar"
def bar = print( n + s )
}
defined module FooObj
2009 6 28

2009 6 28

2009 6 28

2009 6 28

2009 6 28

2009 6 28

•
•
•
2009 6 28

•
•
•
•
2009 6 28

•
2009 6 28

•
•
2009 6 28

•
•
•
2009 6 28

•
•
•
•
2009 6 28

2009 6 28

2009 6 28

2009 6 28

2009 6 28

2009 6 28

•
•
•
•
2009 6 28

2009 6 28

•
<p><lift:helloWorld.howdy /></p>
class HelloWorld {
def howdy = <span>Welcome to helloworld at
{new _root_.java.util.Date}</span>
}
2009 6 28

•
2009 6 28

•
2009 6 28

•
•
2009 6 28

•
<lift:SampleSnipet.add form="POST">
<entry:description />
<entry:amount /> <br />
<entry:submit />
</lift: SampleSnipet.add >
2009 6 28

•
class SampleSnipet
def add (xhtml : NodeSeq) : NodeSeq = {
var desc = ""
var amount = "0"
def processEntryAdd () { ... }
bind("entry", xhtml,
"description" -> SHtml.text(desc, desc = _),
"amount" -> SHtml.text(amount, amount = _),
"submit" -> SHtml.submit(Add,
processEntryAdd))
}
}
2009 6 28

2009 6 28

•
•
•
•
•
•
2009 6 28

•
‣
‣
‣
•
‣
‣
‣
2009 6 28

2009 6 28

•
class Expense extends LongKeyedMapper[Expense] with IdPK {
def getSingleton = Expense
object dateOf extends MappedDateTime(this)
object description extends MappedString(this,100)
object amount extends MappedDecimal(this,
MathContext.DECIMAL64, 2)
object account extends
MappedLongForeignKey(this, Account)
}
2009 6 28

•
object Expense extends Expense with
LongKeyedMetaMapper[Expense] {
override def fieldOrder =
List(dateOf, description, amount)
}
2009 6 28

•
val myEntries1 = Expense.findAll
val myEntries2 = Expense.findAll(By_>(Expense.amout,5) )
val recentEntries = Expense.findAll(
BySql("dateOf > (CURRENT_DATE - interval ’30 days’)",
IHaveValidatedThisSQL("dchenbecker","2008-12-03"))
2009 6 28

•
var myEntr= Expense.create
myEntry.dateOf(new Date).description("A sample entry")
myEntry.amount(BigDecimal("127.20"))
myEntry.save
myEntry.delete
2009 6 28

2009 6 28

•
•
•
•
2009 6 28

•
•
•
•
2009 6 28

•
•
•
2009 6 28

2009 6 28

•
•
•
•
2009 6 28

•
•
•
2009 6 28

2009 6 28

2009 6 28