/**
 * Round half away from zero ('commercial' rounding)
 * Uses correction to offset floating-point inaccuracies.
 * Works symmetrically for positive and negative numbers.
 */
export function round(num : number, decimalPlaces : number = 0) : number {
    const p = Math.pow(10, decimalPlaces);
    const n = (num * p) * (1 + Number.EPSILON);
    return Math.round(n) / p;
}

export function floor(num : number, decimalPlaces : number = 0) : number {
    const p = Math.pow(10, decimalPlaces);
    const n = (num * p) * (1 + Number.EPSILON);
    return Math.floor(n) / p;
}