Programming-Idioms

Edit summary for version 13 by :
[Java] Original ordering is not preserved.

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2016-02-17, 11:05:34

2016-02-17, 13:19:51

Idiom #119 Deduplicate list

Remove duplicates from list x.
Explain if original order is preserved.

Remove duplicates from list x.
Explain if original order is preserved.

import java.util.HashSet;
import java.util.ArrayList;

import java.util.HashSet;
import java.util.ArrayList;

x = new ArrayList<T>(new HashSet<T>(x));

x = new ArrayList<T>(new HashSet<T>(x));

This creates a new ArrayList object.

This creates a new ArrayList object.
Original ordering is not preserved.

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