Although the scope functions are a way of making the code more concise, avoid overusing them: it can decrease your code readability and lead to errors. Avoid nesting scope functions and be careful when chaining them: it's easy to get confused about the current context object and the value of this or it.

bad-apply-block.kt

// Try to figure out, what changed, without knowing the details
fun makeConnection(first: User, second: User) {
  first.apply {
      second.apply {
          b = a
          c = b
      }
  }
}

fun makeConnection(first: User, second: User) {
  first.b = this.a
  second.c = first.b
}