判断数组是否相等

用法:inport from "这个js文件".然后ArrayA.equals(ArrayB);返回true则相等，false则不相等
/**
 * 数组是否相等
 */
// Warn if overriding existing method
if (Array.prototype.equals) {
  console.warn(
    "Overriding existing Array.prototype.equals. Possible causes: New API defines the method, there's a framework conflict or you've got double inclusions in your code.",
  );
}
// attach the .equals method to Array's prototype to call it on any array
Array.prototype.equals = function(array) {
  // if the other array is a falsy value, return
  if (!array) return false;

  // compare lengths - can save a lot of time
  if (this.length !== array.length) return false;

  for (let i = 0, l = this.length; i < l; i++) {
    // Check if we have nested arrays
    if (this[i] instanceof Array && array[i] instanceof Array) {
      // recurse into the nested arrays
      if (!this[i].equals(array[i])) return false;
    } else if (this[i] !== array[i]) {
      // Warning - two different object instances will never be equal: {x:20} != {x:20}
      return false;
    }
  }
  return true;
};
// Hide method from for-in loops
Object.defineProperty(Array.prototype, 'equals', { enumerable: false });