Remove duplicates but keep order
Java
Easy
5 views
Problem Description
Task: remove duplicates from a list but keep first-seen order. Return the cleaned list.
Output Format
Return value
Constraints
Use LinkedHashSet for stable uniqueness.
Official Solution
static java.util.List<Integer> uniqueKeepOrder(java.util.List<Integer> in){java.util.LinkedHashSet<Integer> set=new java.util.LinkedHashSet<>(in);return new java.util.ArrayList<>(set);}
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