Additional data structures

public static boolean isUniqueChars(String str) {
    long checker1 = 0;
    long checker2 = 0;
    long checker3 = 0;
    long checker4 = 0;
    for (int i = 0; i < str.length(); ++i) {
        int val = str.charAt(i);
        int toCheck = val / 64;
        val %= 64;
        switch (toCheck) {
            case 0:
                if ((checker1 & (1L << val)) > 0) {
                    return false;
                }
                checker1 |= (1L << val);
                break;
            case 1:
                if ((checker2 & (1L << val)) > 0) {
                    return false;
                }
                checker2 |= (1L << val);
                break;
            case 2:
                if ((checker3 & (1L << val)) > 0) {
                    return false;
                }
                checker3 |= (1L << val);
                break;
            case 3:
                if ((checker4 & (1L << val)) > 0) {
                    return false;
                }
                checker4 |= (1L << val);
                break;
        }            
    }
    return true;
}

Source: stackoverflow.com

Similar codes

0 vote204 views1 answer
How to use if statemnts c#
TypeScript
4 votes211 views2 answers
Ionic 3 alert css custom
TypeScript
0 vote212 views1 answer
Typescript class validator validate enum array
TypeScript
3 votes218 views3 answers
Remove duplicate objects based on id from array angular 8
TypeScript
0 vote220 views1 answer
Godot preload
TypeScript
1 vote206 views1 answer
Fake browser visti python headers
TypeScript
0 vote218 views1 answer
Non-abstract class does not implement inherited abstract member typescript
TypeScript
0 vote197 views1 answer
Sr.No. 18, Plot No. 5/3, CTS No.205,Behind Vandevi Temple, Karvenagar, Pune, Maharashtra
TypeScript
1 vote240 views2 answers
Ffmpeg batch convert ts to mp4 files in a folder
TypeScript
0 vote227 views1 answer
Count number of elements in multi-dimensional array python
TypeScript