Javascript compare objects having functions using lodash isEqual

Question

how to compare two objects for equality if they have functions? lodash's isEqual works really well until functions are thrown in:

_.isEqual({
    a: 1,
    b: 2
}, {
    b: 2,    
    a: 1
});

// -> true

_.isEqual({
    a: 1,
    b: 2,
    c: function () {
        return 1;
    }
}, {
    a: 1,    
    b: 2,
    c: function () {
          return 1;
    }
});

// -> false

Answer 1

Are you sure you want to compare functions? If you only care about comparing every property that isn't a function, this is easy to do with lodash:

var o1 = { a: 1, b: 2, c: function() { return 1; } },
    o2 = { a: 1, b: 2, c: function() { return 1; } };

_.isEqual(o1, o2)
// → false

_.isEqual(_.omit(o1, _.functions(o1)), _.omit(o2, _.functions(o2)));
// → true

The functions() function returns a list of function properties, and using omit(), you can get rid of them.