/** 判断两个值是否相等 */
export function equaln(v1: number, v2: number, fuzz = 1e-5)
{
  return Math.abs(v1 - v2) <= fuzz
}

/** 修正数组索引号 */
export function FixIndex(index: number, arr: Array<any> | number)
{
  let count = (Array.isArray(arr)) ? arr.length : arr
  if (index < 0)
    return count + index
  else if (index >= count)
    return index - count
  else
    return index
}

/**
 * 获取数组最大元素的索引号
 * @param compart t2大于t1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
}