export function equaln(v1: number, v2: number, fuzz = 1e-5)
{
    return Math.abs(v1 - v2) <= fuzz;
}

export function FixIndex(index: number, arr: Array<any> | number)
{
    let count = (arr instanceof Array) ? arr.length : arr;
    if (index < 0)
        return count + index;
    else if (index >= count)
        return index - count;
    else
        return index;
}

/**
 * @param compart 如果t2大于t1那么返回t2
 * @returns 索引
 */
export function Max<T>(arr: T[], compart: (t1: T, t2: T) => boolean): number
{
    let best: T = arr[0];
    let bestIndex = 0;
    for (let i = 1; i < arr.length; i++)
    {
        let t1 = arr[i];
        if (compart(best, t1))
        {
            best = t1;
            bestIndex = i;
        }
    }
    return bestIndex;
}