apply vs with

we use apply when we need to perform some operation on a object and return it.

We use with when we need to perform some operation on a object and return some other object.

Difference between apply vs with

apply function will take instance as an receiver while with function we need to pass instance as an argument.But in both case the instance will be refered with this inside the block

Example of apply

fun getDeveloper(): Developer {
    return Developer().apply {
        developerName = "Pandiyan"
        developerAge = 22
    }
}

Example of with

fun getPersonFromDeveloper(developer: Developer): Person {
    return with(developer) {
        Person(developerName, developerAge)
    }
}