All Questions
Tagged with javascriptfunctional-programming
50 questions
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
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
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
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
111votes
3answers
16kviews
Why do Trampolines work?
I've been doing some functional JavaScript. I had thought that Tail-Call Optimization had been implemented, but as it turns out I was wrong. Thus, I've had to teach myself Trampolining. After a bit of ...
- 1,302
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) => ...
23votes
5answers
4kviews
What is the benefit of having "no runtime errors", like Elm claims?
Some languages claim to have "no runtime errors" as a clear advantage over other languages that has them. I am confused on the matter. Runtime error is just a tool, as far as I know, and ...
- 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
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 ...
6votes
3answers
2kviews
What is the name for a NON-self-calling function?
I have a collection of normal functions and self-calling functions within a javascript file. In my comments i want to say something along the lines of "This script can contain both self-calling and ...
31votes
5answers
33kviews
Performance: recursion vs. iteration in Javascript
I have read recently some articles (e.g. http://dailyjs.com/2012/09/14/functional-programming/) about the functional aspects of Javascript and the relationship between Scheme and Javascript (the ...
- 413
36votes
5answers
34kviews
Is Javascript a Functional Programming Language
Is Javascript a functional language? I know it has objects & you can do OOP with it also, but is it also a functional language, can it be used in that way? You know how OOP became/seems like the ...
- 361
9votes
3answers
3kviews
Is a function getting a value from another function considered pure?
I'm trying to figure out a way to handle default variable values when making functions without side effects and have ended up with the following: function getDefaultSeparator() { return ':'; } ...
- 99
26votes
1answer
4kviews
Are generator functions valid in functional programming?
The questions are: Do generators break the functional programming paradigm? Why or why not? If yes, can generators be used in functional programming and how? Consider the following: function * ...
- 1,247
