Jay's proj repo for Core Java practice. List below ARE NOT NOTES. They are topics covered.

package: jayslabs.corejava.coachv : notes and practice code created from coach Venkats lectures

• package c5: Lambda and design; Asset class to demo Strategy Pattern with Lambda (predicate); added main() and test codes
• C4FlatMappingAndFilteringAndTeeing: .flatMapping(), .filtering(), .teeing()
• C4ComputingStatistics - Counting Occurences - Collectors.partitioningBy(predicate);groupingBy(classifier, func);collectingAndThen(); transforming data - .map(), flatMap(), .mapToDouble(); Stats - .average(), Collectors.averagingDouble(func)/summarizingDouble(func), .sum(), .min(), .max(), .anyMatch/noneMatch(predicate)
• C3FilesAndDirectories - watchFileChange() : event notifier when there are changes to a directory/file. Used WatchService, .poll(), WatchKey, .pollEvents(), Path.register(wsrvc, StandardWatchEventKinds.ENTRY_MODIFY)
• C3FilesAndDirectories - .filter(), .newDirectoryStream(), listSelectFiles(), listSubDirs()
• C3FilesAndDirectories - Files, Paths, .list(), .get(), Path, isDirectory()
• C3Collectors - used groupingBy(), reducing(BinaryOperator.maxBy(comparator)) to get map where key is 1st char of name, and val is eldest if persons under that k (reducing)
• C3Collectors - Collectors, .toList(), .toMap(name, ), .toSet(), .groupingBy(classifier, collector), .mapping(function, accumulator)
• C3Compare - used .thenComparing(comparator) to chain comparators; Defined comparator var
• Chap3: C3Compare - added .min(Comparator), .max(Comparator) tests
• Chap3: C3Compare - used .sorted(Comparator), (2) Comparator implementations: define method() calling compareTo(), call Comparator.comparing(T.x), reversed(); C3StringIteration - .chars(), forEach(Consumer), filter(Predicate)
• Chap2: Chap2ReducingCollection - reduce(accumulator), reduce(id, accumulator), accumulator is lambda returning the longer of two strings; .max(Comparator.comparing())
• Chap2: Chap2PickingElement - used Optional, .orElse(string)
• Chap2: create Chap2ReusingLambdaExpressions: created method returning Predicate, and another using inline Function -> Function<String, Predicate>, both to be passed in .filter()
• Chap2: created reusable var for Predicate
• Chap2: forEach(consumer), map(function), method reference, mapToInt(), IntStream.average(). orElse(), filter(predicate), skip(n), dropWhile(predicate), limit(n), takeWhile(predicate)
• Chap1 topics: stream(), filter(predicate), mapToDouble(function), sum()

practice:

• Fibonacci, StringReverse, IsPalindrome
• Factorial with recursive and iterative solution

proj: functionalprog (mvn, jdk21, junit5)

• LinkedList: addFirst(), addLast(), removeFirst(), removeLast()
• Stack: push(), pop()
• List: replaceAll(), set()
• Collections practice; Collection methods: forEach(), removeIf(), Arrays.asList(), add()
• Streams Assignment #8-14
• Streams Assignment #1-7
• Parallel Streams demo
• Optionals Demo
• Primitive Streams demo; added examples
• Streams Demo: Intermediate Operations - sorted()
• Streams Demo: Intermediate Operations - flatMap()
• Streams Demo: Intermediate Operations - map()
• Streams Demo: Intermediate Operations - filter(), distinct(), limit()
• Collectors.partitioningBy() demo: with and without duplicates (using set and supplier to return a TreeMap) and sorted (using TreeSet)
• Collectors.groupingBy() demo: with and without duplicates (using set and supplier to return a TreeMap) and sorted (using TreeSet)
• added samples: Collectors.joining(), Collectors.averagingInt(), Collectors.toMap(), Collectors.toMap(merge values function for duplicate keys), Collectors.toMap(merge function and supplier)
• collect() - demo of collect method with Supplier, accumulator, combiner
• reduce() - count and total chars of all words in a stream: accumulator(BiFunction), combiner(BinaryOperator)
• Demo of Terminal operations: forEach, reduce, collect, min, max, count, anyMatch, allMatch, noneMatch, findFirst, findAny
• Stream creation demo: create stream from array, file, collection; try-with-resources
• Streams Demo: laziness, anymatch, map
• Streams Demo: creating streams, filter, count, peek, forEach
• Answered Assignment 2: Method References
• Answered Assignment 1: Lambdas
• Static and Constructor Method reference demo
• CustomFileReader: use regex to find and replace credit card number with ****
• Unbound method reference demo
• updated bound method reference demo
• Bound method reference demo
• Method reference demo
• final and effectively final demo
• UnaryOperator, BinaryOperator demo
• Function, BiFunction demo, using andThen() and compose()
• Consumer, BiConsumer demo
• Added demoes: Generic method for Predicate, BiPredicate
• Added lambda Predicate demo
• Functional Interface, lambda expression demo
• project and workspace init; fixed tests