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 vote155 views1 answer
Vba check if two sheets are the same
TypeScript
0 vote134 views1 answer
Bits required for address 1 GB memory
TypeScript
0 vote97 views1 answer
Change div with css
TypeScript
0 vote160 views1 answer
Typescript reduce initial value type
TypeScript
0 vote229 views1 answer
Typoescript find multiple items in array and return found
TypeScript
0 vote145 views1 answer
Nestjs get request header in guard
TypeScript
0 vote151 views1 answer
Nodemailer typescript
TypeScript
3 votes130 views1 answer
Typescript object key from other object
TypeScript
0 vote136 views1 answer
Get elements by id like jquery
TypeScript
0 vote153 views1 answer
Ts pipe function
TypeScript