Exercise Collections in Groovy Scripting groovy training telugu 22

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[Exercise] Using Collections

1)Ranges

If you are new to Java or Groovy the idea of an Enum might be new. An Enum is a collection of constant values. We can use this collection of constants to create ranges. I want you to do some reading up on enum's and create an enum for days of the week. ex Sunday, Monday, etc...

Create a range from that enum

Print the size of the Range

Use the contains method to see if Wednesday is in that Range

Print the from element of this range

Print the to element of this range

2)Lists

Create a list days (Sun - Sat)

Print out the list

Print the size of the list

Remove Saturday from the list

Add Saturday back by appending it to the list

Print out the Wednesday using its index

3)Maps

Create a map of days of the week

1: Sunday, 2:Monday, etc...

Print out the map

Print out the class name of the map

Print the size of the map

Is there a method that would easily print out all of the days (values)? 

Without closures you may have to look at the Java API for LinkedHashMap

//Range

enum Days{

SUNDAY,MONDAY,TUESDAY,WEDNESDAY,THURSDAY,FRIDAY,SATURDAY

}

def dayRange=Days.SUNDAY..days.SATURDAY

//for in loop

for(day in dayRange){

println day

}

// using Closures

dayRange.each{day ->

println day

}

println dayRange.size()

println dayRange.contains(Days.WEDNESDAY)

println dayRange.from

println dayRange.to

//List

def days = ["SUNDAY","MONDAY","TUESDAY","WEDNESDAY","THURSDAY","FRIDAY","SATURDAY"]

println days

println days.size()

days.pop()

println days

days<<"Sunday"

println days

println days[2]

//Map

def days = [1:"SUNDAY",2:"MONDAY",3:"TUESDAY",4:"WEDNESDAY",5:"THURSDAY",6:"FRIDAY",7:"SATURDAY"]

println days

println days.getClass().getName()

println days.size()

println days.values()