[Gotprgmer] Week 2 #738
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[Gotprgmer] Week 2 #738
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TonyKim9401
reviewed
Dec 21, 2024
| for(int j=i+1;j<nums.length;j++){ | ||
| int checkNum = nums[i]+nums[j]; | ||
| if(set.contains(-checkNum)){ | ||
| numList = new ArrayList<>(Arrays.asList(nums[i], -checkNum, nums[j])); |
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List.of() 문법에 대해 찾아보시면
numList = List.of(nums[i], checkNum, nums[j]); 로 줄이실 수 있을거에요 :)
List.of의 단점은 immutable인 걸로 알고있습니다.
TonyKim9401
reviewed
Dec 21, 2024
Comment on lines
+8
to
+28
| Map<Character,Integer> sMap = new HashMap<>(); | ||
| Map<Character,Integer> tMap = new HashMap<>(); | ||
| if(s.length() != t.length()){ | ||
| return false; | ||
| } | ||
| for(int i=0;i<s.length();i++){ | ||
| char sChar = s.charAt(i); | ||
| char tChar = t.charAt(i); | ||
| sMap.put(sChar,sMap.getOrDefault(sChar,0)+1); | ||
| tMap.put(tChar,tMap.getOrDefault(tChar,0)+1); | ||
| } | ||
| boolean flag = true; | ||
| for(char c:sMap.keySet()){ | ||
| if(!sMap.getOrDefault(c,0).equals(tMap.getOrDefault(c,0))){ | ||
| flag = false; | ||
| System.out.println(c); | ||
| break; | ||
| } | ||
| } | ||
|
|
||
| return flag; |
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String을 toCharArray()를 사용하여 char[] 로 만든 후,
Arrays.sort()를 사용 하여 정렬 한 뒤
Arrays.equals(sCharArray, tCharArray);
를 사용하는 방법도 있다는걸 알려드립니다!
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너무 감사해요 자바 알고 뉴비라서 이런 팁들이 필요한데 감사합니다.
TonyKim9401
approved these changes
Dec 21, 2024
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