lambda Archives - Page 5 of 7

Java 8 lambdas, Function.identity() or t->t

I have a question regarding the usage of the Function.identity() method. Imagine the following code: Arrays.asList("a", "b", "c") .stream() .map(Function.identity()) // <- This, ...

May 15, 2022
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What do lambda function closures capture?

Recently I started playing around with Python and I came around something peculiar in the way closures work. Consider the following code: adders=...

May 14, 2022
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When to use lambda, when to use Proc.new?

In Ruby 1.8, there are subtle differences between proc/lambda on the one hand, and Proc.new on the other. What are those differences? Can ...

May 12, 2022
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How can I throw CHECKED exceptions from inside Java 8 streams?

How can I throw CHECKED exceptions from inside Java 8 streams/lambdas? In other words, I want to make code like this compile: public ...

May 12, 2022
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Difference between final and effectively final

I’m playing with lambdas in Java 8 and I came across warning local variables referenced from a lambda expression must be final or ...

May 10, 2022
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Break or return from Java 8 stream forEach?

When using external iteration over an Iterable we use break or return from enhanced for-each loop as: for (SomeObject obj : someObjects) { ...

May 9, 2022
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No Multiline Lambda in Python: Why not?

I’ve heard it said that multiline lambdas can’t be added in Python because they would clash syntactically with the other syntax constructs in ...

May 6, 2022
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Reflecting parameter name: abuse of C# lambda expressions or syntax brilliance? [closed]

Closed. This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be ...

May 6, 2022
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How do I define a method which takes a lambda as a parameter in Java 8?

In Java 8, methods can be created as Lambda expressions and can be passed by reference (with a little work under the hood). ...

May 6, 2022
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Is there a way to perform “if” in python’s lambda?

In Python 2.6, I want to do: f = lambda x: if x==2 print x else raise Exception() f(2) #should print "2" f(3) ...

May 5, 2022
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