lambdas | Write short and fully-typed lambdas | Functional Programming library

I am working with lambdas for the first time. I am supposed to write a function walk() which takes a lambda function as a parameter.

In the header I declared said function as:

As the title says I'm trying to sort a list of nested dictionaries without knowing its keys.
If possible I'd like to use one of the 2 following functions to solve my problem:

• list.sort()
• sorted()

I want it to be sorted by occurrences OR tf-idf (same shit)
I've currently tried both with lambdas but nothing worked.

Sample of my data:

I have a callable struct Foo defined as

I've worked with the AWS environment for 4 years, mostly with Lambdas. From my experience, I know that an "instance" of a Lambda function will live aprox for 2 hours.

Now I'm going to work for a project with GCP and their Cloud Functions: is there any information about how much time a CF "instance" will live?

I generally need to know that in order to better understand how frequently we will face a cold start.

I'm coming to kotlin after working in mostly dynamically typed languages for years, so I get a lot of what I'm seeing, but I'm still tripping up a bit over reading some of the type annotations.

Most of them make sense (I've written some C++ and typescript so I'm not wholey familiar with more strictly type languages). so stuff like annotating the parameters and return types for functions, variable declaration, stuff like that makes sense.

What I'm having trouble with is the more complex annotations like looking at this explanation of the fold method when talking about higher order functions:

I am wondering what may be a good way of implementing some kind of observable in Java without much Interface-Stuff. I thought it would be nice to use the predefined functional interfaces. For this example, I use a String Consumer to represent a listener that takes a String for notification.

I have some data inside MATLAB. On the picture you can see a small portion:-

The numbers I'm interested in are RPM and Lambda. As you can see, they are neither strictly decreasing or increasing (they are non-linear so to speak). I want to find the average Lambda value in RPM intervals, like from 250-500, 500-750, 1000-1250 and so on. But I don't know how to write such code in MATLAB and the reason is that I won't know at what index this will happen, because the RPM numbers aren't strictly decreasing/increasing.

I need to configure a lambda via serverless.yml to use different provision concurrency for different environments. Below is my lambda configuration:

I am using serverless.yml to deploy lambdas to AWS and I'd like to know how to configure the resource-based policy for my lambda.

I deploy a customised alias to my lambda and need to grant invoke:lambda in the policy of the resouce-based policy. So when you open lambda -> configuration -> permission, the policy should appear as below

when I use the role configure in serverless.yml, it only changes the permission for my lambda execution role. How can I modify the Resource-based policy for my lambda?