MapOperatorActivity.kt

package com.coderefer.rxandroidexamples.intro.operators.transform

import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.util.Log
import com.coderefer.rxandroidexamples.R
import io.reactivex.Observable
import io.reactivex.disposables.Disposable

private const val TAG = "MapOperator"
class MapOperatorActivity : AppCompatActivity() {
    private lateinit var disposable: Disposable

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_map_operator)

        val observable =
                Observable.just(1,2,3,4,5)
                        .map {
                            it*10
                        }

        disposable = observable.subscribe {
            Log.d(TAG, it.toString())
        }

    }

    override fun onDestroy() {
        disposable.dispose()
        super.onDestroy()
    }
}