Question

How to sort a string with digits and letters (letters before digits) in TypeScript

Answer 1

function customSort(input: string): string {
    const chars: string[] = input.split('');

    chars.sort((a: string, b: string) => {
        if (isNaN(Number(a)) && !isNaN(Number(b))) return -1; // Letters before digits
        if (!isNaN(Number(a)) && isNaN(Number(b))) return 1;  // Digits after letters
        return a.localeCompare(b);
    });

    return chars.join('');
}

const input: string = "d2a4b3c1";
const sortedInput: string = customSort(input);

console.log("Custom sorted string:", sortedInput);




/*
run:

"Custom sorted string:",  "abcd1234" 

*/

 

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