A Tour of Scala - an interactive scala tutorial

//Number operations   
//Ranges   
//creates a range between 1 to 10 inclusive  
val range = 1 to 10   
//creates a range between 1 to 10 exclusive   
val range2 = 1 until 10   
//from 2 to 10 with jumps of 3  
val range3 = 2 until 10 by 3   

println(range3.toList) //List(2, 5, 8)  

//Number convinience methods   
val num = -5  
val numAbs = num.abs //absolute value  
val max5or7 = numAbs.max(7)  
val min5or7 = numAbs.min(7)  
println(numAbs) //5  
println(max5or7) //7   
println(min5or7) //5  

//String operations   

val reverse = "Scala".reverse //reverse a string   
println(reverse) //alacS  

val cap = "scala".capitalize //make first char caps  
println(cap) //Scala  

val multi = "Scala!" * 7 //repeat n times   
println(multi) //Scala!Scala!Scala!Scala!Scala!Scala!Scala!  

val int = "123".toInt //parse as Int  
println(int)  

//Useful methods on collections   

//filter - keep only items larger than 4   
val moreThan4 = range.filter(_ > 4)  
println(moreThan4) //Vector(5, 6, 7, 8, 9, 10)  

//map - transform each item in the collection   
val doubleIt = range2.map(_ * 2)  
println(doubleIt) //Vector(2, 4, 6, 8, 10, 12, 14, 16, 18)
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8 Useful operations
