js判断两个数组是否相等

arrayEquals(array1, array2) {
	// if array1 or array2 is a falsy value, return
	if (!array1 || !array2) return false;
	// compare lengths - can save a lot of time
	if (array1.length != array2.length) return false;
	for (var i = 0, l = array1.length; i < l; i++) {
		// Check if we have nested arrays
		if (array1[i] instanceof Array && array2[i] instanceof Array) {
			// recurse into the nested arrays
			if (!Tool.arrayEquals(array1[i], array2[i])) return false;
		} else if (array1[i] instanceof Object && array2[i] instanceof Object) {
			// 比较含有的对象是否相等
			if (!Tool.objectEquals(array1[i], array2[i])) return false;
		} else if (array1[i] != array[i]) {
			// Warning - two different object instances will never be equal: {x:20} != {x:20}
			return false;
		}
	}
	return true;
},