export function reverse(entry: string | number | any[]): string | number | any[] {
    const x = typeof entry;
    if (['number', 'string'].includes(x)) {
        const array = entry.toString().split('');
        if (array.length <= 0) throw new ReferenceError('The entered entry is 0 in length.');
        const reversed = array.reverse().toString();
        return x === 'string' ? reversed : parseInt(reversed);
    } else if (Array.isArray(entry)) {
        return entry.reverse();
    } else throw new ReferenceError('It must be entry or number type.');
}

export function upperCase(entry: string | string[]): string | string[] {
    const x = typeof entry;
    if (x === 'string') {
        return (entry as string).toUpperCase();
    } else if (Array.isArray(entry)) {
        return (entry as string[]).map((e) => e.toUpperCase());
    } else throw new ReferenceError('The input is not a string or an array.');
}

export function lowerCase(entry: string | string[]): string | string[] {
    const x = typeof entry;
    if (x === 'string') {
        return (entry as string).toLowerCase();
    } else if (Array.isArray(entry)) {
        return (entry as string[]).map((e) => e.toLowerCase());
    } else throw new ReferenceError('The input is not a string or an array.');
}

export function roll(number1?: number, number2?: number) {
    if (!number1) number1 = 0;
    if (!number2) number2 = 100;
    return Math.floor(Math.random() * (number2 - number1) + number1);
}