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 vote253 views1 answer
Check if drive exists c#
TypeScript
1 vote259 views1 answer
How to move data between request
TypeScript
0 vote261 views1 answer
How to make a dictionary of indices and lists python
TypeScript
0 vote303 views1 answer
How to read excel spreadsheets in c++
TypeScript
0 vote302 views1 answer
AFTER RESETTING ANGULAR FORM I AM GETTING RED INVALID FORM
TypeScript
0 vote272 views1 answer
The dialect mongodb+srv is not supported. Supported dialects feathers
TypeScript
1 vote272 views1 answer
Npm run serve https
TypeScript
1 vote259 views1 answer
Npm type-check nested arrays
TypeScript
3 votes268 views1 answer
Model has no objects member django
TypeScript
-1 vote285 views1 answer
Java list of objects example
TypeScript