adam-arold · September 11, 2017 16:37
diff --git a/KotlinFilterOperation.kt b/KotlinFilterOperation.kt
 class KotlinFilterOperation {

    private val items = listOf<String>()

    fun filterBy(fn: (String) -> Boolean) = items.filter(fn)

    fun doFilter() {
        filterBy(String::isNotEmpty)
        // note the exension function `isNotEmpty` added to `String`!
    }
 }
	class KotlinFilterOperation {

	private val items = listOf<String>()

	fun filterBy(fn: (String) -> Boolean) = items.filter(fn)

	fun doFilter() {
	filterBy(String::isNotEmpty)
	// note the exension function `isNotEmpty` added to `String`!
	}
	}