What are some examples of using lodash merge?

Can you show me some examples of how to use lodash merge?

Sure! Lodash's merge function is used to deeply merge two or more objects. Here's a basic example:

const _ = require('lodash');

const object1 = { a: 1, b: { c: 2 } };
const object2 = { b: { d: 3 }, e: 4 };

const merged = _.merge(object1, object2);
console.log(merged);
// Output: { a: 1, b: { c: 2, d: 3 }, e: 4 }

What happens if there are conflicting properties?

In case of conflicting properties, merge will recursively merge the properties. For example:

const obj1 = { a: 1, b: { x: 1 } };
const obj2 = { b: { x: 2, y: 2 } };

const result = _.merge(obj1, obj2);
console.log(result);
// Output: { a: 1, b: { x: 2, y: 2 } }

Here, the property x from obj2 overwrites the one from obj1.

Can I merge arrays using lodash merge?

Yes, you can merge arrays, but merge will concatenate them. For example:

const array1 = { a: [1, 2] };
const array2 = { a: [3, 4] };

const mergedArrays = _.merge(array1, array2);
console.log(mergedArrays);
// Output: { a: [3, 4] }

In this case, the second array replaces the first.

Are there any performance considerations when using lodash merge?

Yes, merge can be slower for large objects due to its deep merging nature. If performance is critical, consider using shallow merge methods or optimizing your data structure.