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Commit 57551c7

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asifiqbal31shekhargulati
authored andcommitted
Just filling in some potentially missing code (#19)
* Adding call to getTitle() inside TaskExtractor interface * Filling in potentially missing piece of code * Reverting one of the previous changes, was a mistake on my part
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‎02-lambdas.md‎

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@@ -492,14 +492,27 @@ public class Exercise_Lambdas {
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Using method reference for extractor
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```java
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public static void main(String[] args) {
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List<Task> tasks = getTasks();
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List<String> titles = filterAndExtract(tasks, task -> task.getType() == TaskType.READING, Task::getTitle);
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titles.forEach(System.out::println);
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List<LocalDate> createdOnDates = filterAndExtract(tasks, task -> task.getType() == TaskType.READING, Task::getCreatedOn);
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createdOnDates.forEach(System.out::println);
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List<Task> filteredTasks = filterAndExtract(tasks, task -> task.getType() == TaskType.READING, Function.identity());
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filteredTasks.forEach(System.out::println);
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public class Exercise_Lambdas {
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public static void main(String[] args) {
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List<Task> tasks = getTasks();
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List<String> titles = filterAndExtract(tasks, task -> task.getType() == TaskType.READING, Task::getTitle);
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titles.forEach(System.out::println);
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List<LocalDate> createdOnDates = filterAndExtract(tasks, task -> task.getType() == TaskType.READING, Task::getCreatedOn);
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createdOnDates.forEach(System.out::println);
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List<Task> filteredTasks = filterAndExtract(tasks, task -> task.getType() == TaskType.READING, Function.identity());
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filteredTasks.forEach(System.out::println);
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}
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public static <R> List<R> filterAndExtract(List<Task> tasks, Predicate<Task> filterTasks, Function<Task, R> extractor) {
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List<R> readingTitles = new ArrayList<>();
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for (Task task : tasks) {
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if (filterTasks.test(task)) {
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readingTitles.add(extractor.apply(task));
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}
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}
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return readingTitles;
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}
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}
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```
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