FilesExpand file tree

 master

/

ContainsDuplicate.java

Copy path

BlameMore file actions

BlameMore file actions

Latest commit

 

History

History

History

17 lines (15 loc) · 575 Bytes

 master

/

ContainsDuplicate.java

Top

File metadata and controls

• Code
• Blame

17 lines (15 loc) · 575 Bytes

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

//Given an array of integers, find if the array contains any duplicates. Your function should return

//true if any value appears at least twice in the array, and it should return false if every element is distinct.

class ContainsDuplicate {

public boolean containsDuplicate(int[] nums) {

HashMap<Integer, Integer> map = new HashMap<Integer, Integer>();

for(int i: nums) {

if(map.containsKey(i)) {

return true;

} else {

map.put(i, 1);

}

}

return false;

}

}