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The following decision tree will help
you to choose the appropriate collection class from the alternatives:
Access by integer index only?
| |
| | Yes
| No *------------*
v v
Accessible from ends? Use Array
| |
| | Yes
| No *-----------------*
v v
Duplicates counted separately? Keep sorted?
| | | |
| | | | Yes
| No | Yes | No *----------------*
v v v |
Use Bag Use Set Use OrderedCollection |
v
Use SortedCollection