Facing problem while comparing two javaScript array along with values [duplicate]

Question

var obj1 = { key1: 'value1', key2: 'value2', key3: [] },
    obj2 = { key1: 'value1', key2: 'someOtherValue', key3: [] },
    map = new Map();

Object.keys(obj1).forEach(k => map.set(k, obj1[k]));
Object.keys(obj2).forEach(k => map.get(k) !== obj2[k] && console.log(k + ' is different'));

I taken the piece of code from how to compare two javascript array using angular.foreach but in my scenario need to add array also in map, So please help me out from this. Thanks.

Answer 1

You could stringify the value to get a comparable value.

The original code checks the value with primitive types. By using objects, the object reference is used for checking. If you have two different arrays, you have two different object references.

var obj1 = { key1: 'value1', key2: 'value2', key3: [] },
    obj2 = { key1: 'value1', key2: 'someOtherValue', key3: [] },
    map = new Map();

Object.keys(obj1).forEach(k => map.set(k, obj1[k]));
Object.keys(obj2).forEach(k => {
    const value = map.get(k);
    if (value !== obj2[k] && JSON.stringify(value) !== JSON.stringify(obj2[k])) {
        console.log(k + ' is different');
    }
});