compare array and arraylist of groovy ; arrayList is alway useful

 

Operation	Array	ArrayList
Initialization	def arr = [1, 2, 3]	def list = [1, 2, 3] as ArrayList
Create Empty	def arr = [] as int[]	def list = new ArrayList()
Add Element	Not directly supported	list.add(element) or list << element
Add Multiple Elements	Not directly supported	list.addAll([element1, element2])
Access Element by Index	arr[index]	list[index]
Modify Element by Index	arr[index] = value	list[index] = value
Remove Element by Index	Not directly supported	list.remove(index)
Remove Element by Value	Not directly supported	list.remove(value)
Check if Empty	arr.isEmpty()	list.isEmpty()
Get Size	arr.size()	list.size()
Iterate (for-each loop)	for (element in arr)	for (element in list)
Iterate (for loop)	for (i = 0; i < arr.size(); i++)	for (i = 0; i < list.size(); i++)
Contains Element	element in arr	element in list
Sort (In-place)	arr.sort()	list.sort()
Sort (Create Sorted Copy)	def sortedArr = arr.sort(false)	def sortedList = list.sort(false)
Join Elements into String	arr.join(", ")	list.join(", ")