ericntd · August 15, 2020 13:56
diff --git a/sum-each-group-hardway.kt b/sum-each-group-hardway.kt
 // prepare variable employees which is a list of Employee object
 // Same as Task 0
 employees.groupingBy { it.department }
    .fold(initialValue = 0) { total, employee -> total + employee.salary }
    .map {
        println("Total salary for department ${it.key} is ${it.value}")
    }
	// prepare variable employees which is a list of Employee object
	// Same as Task 0
	employees.groupingBy { it.department }
	.fold(initialValue = 0) { total, employee -> total + employee.salary }
	.map {
	println("Total salary for department ${it.key} is ${it.value}")
	}