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 vote345 views1 answer
Vue 3 bootstrap 5 tooltip
TypeScript
0 vote332 views1 answer
Google sheets format number as duration formula
TypeScript
0 vote359 views1 answer
Hsts wordpress
TypeScript
1 vote311 views1 answer
Prevent row click event when button is clicked angular html
TypeScript
0 vote345 views1 answer
This expression is not callable. typescript angular 11 socket.io
TypeScript
30 votes324 views3 answers
Set number of decimals python
TypeScript
0 vote329 views1 answer
Piechart am4charts legend with actual values
TypeScript
0 vote360 views1 answer
How to remove second square brackets in an array
TypeScript
0 vote356 views1 answer
React native styled-components responsive font
TypeScript
1 vote331 views1 answer
Tsconfig path if you are sure the module exists, try these steps:
TypeScript