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#99 Map Filter Reduce Sorted in Java
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In this lecture we will learn:
- Working of the filter method
- What is a predicate method
- Map method and its working
- How reduce method works?
- Sorted and ParallelStream methods with stream
#1
filter() method:-
- filter method needs an object as a parameter of type Predicate.
- Predicate is an interface that contains a method called test which returns a boolean value.
- When you apply the filter method on a value, if it satisfies the condition then it goes further otherwise stops.
#2
map() method:-
- Map needs an object of a functional and it is a functional interface.
- It contains a method called apply(). In apply method, we can do the desired operation on a value.
- Function takes two types, one what is accepted and the other that it returns.
#3
reduce() method:-
- Reduce method takes two parameters, one is the type and the second is the BinaryOperator for operation.
- BinaryOperator extends the BiFunction and it calls a method to apply.
#4
sorted() and parallelStream() method:-
- By using the sorted() method with a stream, it will return a sorted stream.
- There is a method called parallelStream() used with the filter that creates multiple threads to work faster.
- parallelStream should not be used with a sorted method as sorting requires all the elements together, so there multiple threads will create an ambiguity.
More Learning :
Donation:
PayPal Id : navinreddy20
Coupon: TELUSKO10 (10% Discount)
Coupon: TELUSKO20 (20% Discount)
For More Queries WhatsApp or Call on : +919008963671
Udemy Courses:
In this lecture we will learn:
- Working of the filter method
- What is a predicate method
- Map method and its working
- How reduce method works?
- Sorted and ParallelStream methods with stream
#1
filter() method:-
- filter method needs an object as a parameter of type Predicate.
- Predicate is an interface that contains a method called test which returns a boolean value.
- When you apply the filter method on a value, if it satisfies the condition then it goes further otherwise stops.
#2
map() method:-
- Map needs an object of a functional and it is a functional interface.
- It contains a method called apply(). In apply method, we can do the desired operation on a value.
- Function takes two types, one what is accepted and the other that it returns.
#3
reduce() method:-
- Reduce method takes two parameters, one is the type and the second is the BinaryOperator for operation.
- BinaryOperator extends the BiFunction and it calls a method to apply.
#4
sorted() and parallelStream() method:-
- By using the sorted() method with a stream, it will return a sorted stream.
- There is a method called parallelStream() used with the filter that creates multiple threads to work faster.
- parallelStream should not be used with a sorted method as sorting requires all the elements together, so there multiple threads will create an ambiguity.
More Learning :
Donation:
PayPal Id : navinreddy20
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