Android Development with Kotlin

The run and with functions

The run and with functions are both accepts a lambda literal with a receiver as an argument and return its result. The difference between them is that run accepts a receiver, while the with function is not an extension function and it takes the object we are operating in as a parameter. Both functions can be used as an alternative to the apply function when we are setting up an object:

    val button = findViewById(R.id.button) as Button 
 
    button.apply { 
        text = "Click me" 
        isVisible = true 
        setOnClickListener { /* ... */ } 
    } 
 
    button.run { 
        text = "Click me" 
        isVisible = true 
        setOnClickListener { /* ... */ } 
    } 
 
    with(button) { 
        text = "Click me" 
        isVisible = true 
        setOnClickListener { /* ... */ } 
    } 

The difference between apply ...