Question

How to check if two halves of a number are equal in TypeScript

Answer 1

function halvesEqual(n: number): boolean {
    const s: string = n.toString();
    const len: number = s.length;

    if (len % 2 !== 0) {
        return false; // cannot split evenly
    }

    const half: number = len / 2;
    const left: string = s.slice(0, half);
    const right: string = s.slice(half);

    return left === right;
}

function main(): void {
    const testNumbers: number[] = [1212, 123123, 45454545, 123, 1213];

    for (const n of testNumbers) {
        console.log(`${n} -> ${halvesEqual(n) ? "equal halves" : "not equal"}`);
    }
}

main();



/*
run:

"1212 -> equal halves" 
"123123 -> equal halves" 
"45454545 -> equal halves" 
"123 -> not equal" 
"1213 -> not equal" 

*/

 

70+ SQL courses for beginners and professionals