Android Development with Kotlin

The also function

The also function is similar to apply, with the only difference being that the parameter function accepts an argument as an parameter rather than as an receiver. It is preferable when we want to do some operations on an object that are not initializations:

    abstract class Provider<T> { 
 
       var original: T? = null 
       var override: T? = null 
 
       abstract fun create(): T 
 
       fun get(): T = override ?: original ?: create().also { original = it } 
    } 

The also function is also preferable when we need to do an operation in the middle of processing, for example, during object construction using the Builder pattern:

 fun makeHttpClient(vararg interceptors: Interceptor) = OkHttpClient.Builder() .connectTimeout(60, TimeUnit.SECONDS) .readTimeout(60, ...