All Questions
Tagged with javascriptfunctional-programming
50 questions
0votes
3answers
235views
How to filter "locally and remotely" in functional programming
My example applies to reading and deleting files (I/O), but this is probably a common scenario (eg, keeping local and global state in sync in functional programming). I am reading in files from a ...
- 263
3votes
3answers
304views
How to "pass through" data in a functional programming pipeline so that it's accessible later on in the pipeline
I am trying to refactor some JavaScript code to use functional programming principles. I have some functions that I want to use in a series of maps. const transformedData = rawData .map(...
- 263
5votes
3answers
616views
Are "pipelines" in functional programming bad for time complexity?
This question is not meant to be a critique of functional programming, but more hoping for resources and opinions. I am refactoring some historically messy code so that it follows functional ...
- 263
1vote
2answers
324views
Why did TC39 name JavaScript's array predicate functions `some` and `every` instead of `any` and `all`?
Python, Ruby, Rust, Haskell, Kotlin, C#, C++, Perl, MATLAB, SQL, and R all call their respective array predicate checking functions any and all. Is there any record of why JavaScript's designers ...
- 127
0votes
2answers
759views
Should I use unnecessary function for readability sake
I am implementing if/else statement, by using function "inCase" to make it more readable: const size = 'small' const equals = str1 => str2 => str2 === str1 const inCase = (obj) => ...
4votes
3answers
963views
Is this extensive usage of closure a known (anti-)pattern? And does it have a name?
I often use function closures for storing data (e.g. database URL), which doesn't change between function calls. Is this an (anti-)pattern? Does it have a name? While developing apps, which recieve ...
16votes
10answers
7kviews
Are immutable objects important only in multi-threaded applications and if so, how are shared immutable objects useful?
I think the answer to the first part of my question is, "yes" -- no point in making objects immutable in a single-threaded application (or I guess in a multi-threaded application if that ...
- 539
12votes
2answers
5kviews
A real-life example of using curry function? [closed]
I was struggled to find a real-life example of using curry function and get the benefit of using curry. When I google curry function I often see the example like let add = x => y => x + y; let ...
- 3,307
1vote
4answers
471views
In Haskell, is it a "violation" of functional programming to interact with something that was not a function parameter?
I'm sure this must have been asked before, but I can't find anywhere that actually answers my question, so apologies if I have simply overlooked this. I am currently learning Haskell, and loving the ...
- 141
3votes
1answer
1kviews
How do functional programming advocates use a framework like React or Angular?
I read this blog post recently: The Two Pillars of JavaScript Part 1: How to Escape the 7th Circle of Hell, which is essentially a criticism of object oriented programming, and advocacy for funtional ...
- 2,687
0votes
1answer
177views
Is the usage of flip function a smell for bad design?
Everything is in the title, is the usage of flip function a smell for bad design ? I'm coming from a JavaScript universe and used to work with lodash/fp or ramda. Recently, I've written some stuff ...
- 1,561
1vote
0answers
563views
Understanding transducers, why this is not a transducer
I'm currently learning functional programming and trying to learn a new concept : transducers. I'm actually getting the point of theory, like it's an advanced map/reduce that aims to provide better ...
- 1,561
10votes
1answer
796views
Why most anonymous functions can't be JIT compiled and will never be optimized?
I just read https://techfindings.one/archives/2652 about functional programming and came accross this: anonymous functions can often not be JIT compiled and will never be optimized Can someone ...
- 219
4votes
2answers
484views
What are the correct functional programming terms for what I'm doing here?
I recently needed a function to deep clone an object. I started with the code given as an accepted answer to this question: https://stackoverflow.com/a/728694/1253156 However, our SonarQube ...
- 159
9votes
2answers
791views
How can I _read_ functional JavaScript code?
I believe I have learned some/many/most of the basic concepts underlying functional programming in JavaScript. However, I have trouble specifically reading functional code, even code I've written, and ...
