Questions tagged [higher-order-functions]
Higher-order functions are functions which either take functions as arguments or return them as output (or both). They are a cornerstone of functional programming.
28 questions
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What would be a good analogy for explaining higher order functions?
I am teaching a beginners course on JavaScript programming and web development. Passing a function as a value into another function is a very common thing in JS from the very beginning.
As the ...
- 467
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1
answer
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How should I document a higher-order Python function?
I'm interested in designing a high level function in Python, (I.E. a function that takes other functions as arguments) but I don't know of any good conventions for documenting such a function. For ...
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How to name a function that returns a function?
Let's say, for example, that I have a function makeFoo that makes another function foo:
function makeFoo(string) {
return () => string
}
const foo = makeFoo('bar');
I know that makeFoo is a ...
- 209
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3
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views
Do higher order functions violate the separation of data and code principle?
I am asking here something that is really haunting for years (for real !).
I guess in a "perfect world", we would have programs made of data models and functions, and those functions manipulate data ...
- 241
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votes
3
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views
Language design : How to type higher order functions parameters?
I'm trying to design a theoretical programming language and I'm facing a problem with high order functions.
The language is strong-typed, so the way to define a standard function is like so :
...
- 241
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vote
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answer
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JS Higher Order Function is even necessary in this scenario?
In Javascript, I have seen a code like:
const getSomeMapper = (param1, param2, param3)
(param4, param5, param6) => {
// uses all these params and returns a promise
}
interface ...
- 113
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votes
2
answers
1k
views
Does chaining higher order functions mean worse performance?
For clarification, let's review the following example:
Consider that we have the following array of Ints:
let array = [1, 2, 3, 4, 5]
and we've been asked to generate a new array from array ...
- 101
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votes
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What differentiates function objects from poltergeists?
The Short (Original) Version
How are function objects, sometimes called "functors" in C++ and other OO languages, where they make sense different from classes symptomatic of the poltergeist anti-...
- 282
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vote
2
answers
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High order functions: What's the benefit returning a function compared to a value?
In order words, what's the advantage of writing this:
Listing 1
var sortBy = function sortBy(p) {
return function (a, b) {
return a[p] > b[p];
};
};
Compared to this?
Listing 2
var ...
- 383
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votes
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Are lower-arity functions subtypes of higher-arity ones?
I've found that there isn't a concept similar to "arity-based subtyping" in many languages that I've programmed in, where higher-order functions could consume functions of lower arity than their ...
- 517
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votes
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State propagation(bottom-up) in multi-walk tree
Using the Tree representation(mentioned below),
typedef enum {Running, Warning, Critical}Status;
struct TreeNode;
typedef struct List{
int childCount;
struct treeNode **childList;
}List;
...
- 2,325
1
vote
2
answers
345
views
How to name a function that copy or rename a file/directory
I have a function
function name(src, dest, remove) {
copy(src, dest);
if (remove) {
delete(src);
}
}
What name should I give to that function? Alternatively higher order function ...
- 143
1
vote
1
answer
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views
How to preserve parameter names when using bind to define new methods
I'm writing javascript object that wraps REST requests. For every operation on the server there is a method that accepts the parameters for the request and a callback that will receive the results. (...
- 2,676
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6
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Function creating function, compiled languages equivalent
I'm new to compiled languages. I'm learning C. I'm used to coding in python.
I was wondering if there was any equivalent, or replacement method in compiled langues for functions able to create a ...
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answer
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How to move from OOP object composition to FP function composition in C#
I have been working for a few weeks on a new web project and I am realizing that all I am doing is basically calculations and transformations on data, and that most of my classes do not contain any ...
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