解答

[uaison]

第一题

function equalObject(obj1, obj2){
	let str1 = JSON.stringify(obj1);
	let str2 = JSON.stringify(obj2);
	if(str1===str2) return true;
	if(str1.length!=str2.length) return false;
	let a = str1.substring(1,str1.length-1);
	let b = str2.substring(1, str2.length-1);
	return a.split(',').every(item => b.indexOf(item)>-1)
}

第二题

function equalArray(arr1, arr2) {
	return arr1.every((item,index)=>item===arr2[index]);
}

第三题

function equal(arg1, arg2) {
	let type1 = Object.prototype.toString.call(arg1);
	let type2 = Object.prototype.toString.call(arg2);
	if(type1 !== type2) return false;
	if(type1 === '[object Array]')
		return arg1.every((item, index) => equalObject(item, arg2[index]));
	if(type1 === '[object Object]') {
		let keys1 = Object.keys(arg1);
		let keys2 = Object.keys(arg2);
		if(keys1.length!==keys2.length) return false;
		return keys1.every(key => {
			if(Object.prototype.toString.call(arg1[key]) === '[object Object]')
                return equalObject(arg1[key], arg2[key]);
			if(Object.prototype.toString.call(arg1[key]) === '[object Array]')
                return equalArray(arg1[key], arg2[key]);
			return arg1[key] === arg2[key];			
		})
	}
}