Questions tagged [clojure]
Clojure is a general-purpose language supporting interactive development that encourages a functional programming style, and simplifies multithreaded programming.
91 questions
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How can we handle inserts/delete cases using Map like data structures in FP?
Let's say, that we keep track of students entering the auditorium using their IDs(Key) and their check-in time(Value) in a Map. We delete the entries once they move out of the auditorium. I want to ...
- 399
0
votes
1
answer
104
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In clojure, how to structure a simple reverse file search function to make it unit testable
I have the following pair of functions used for searching upwards for a configuration file:
(defn has-config? [path]
contains? (set (.list path)) "my-config")
(defn find-config-path [path]
(cond
...
- 109
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1
answer
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Is Clojure a wrong choice for implementing Data Structures?
I am planning to improve my knowledge of Clojure and algorithms at the same time by implementing some known data structures in Clojure (e.g. linked lists, skip lists, bloom filter, etc.). However, I ...
- 487
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How Functional Programming addresses concurrent increment/decrement operations invoked by different users? [duplicate]
Using Functional language, How can 2 different parties achieve the result of increment/decrement operations concurrently?
For the below scenario, Let's say, I've 2 quantities in stock and 2 users in ...
- 399
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2
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878
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How Functional Programming addresses concurrent increment/decrement operations invoked by different users?
Using Functional language, How can 2 different parties achieve the result of increment/decrement operations concurrently?
For the below scenario,
Let's say, I've 2 quantities in stock and 2 users in ...
- 399
37
votes
7
answers
9k
views
What are the functional equivalents of imperative break statements and other loop checks?
Let's say, I've the below logic. How to write that in Functional Programming?
public int doSomeCalc(int[] array)
{
int answer = 0;
if(array!=null)
{
for(...
- 399
2
votes
3
answers
914
views
Can functional programming used for solving problems which require randomness?
This older question tells us that in functional programming "true" randomness cannot be achieved since in FP functions are pure/idempotent and return the same value irrespective of number of ...
- 399
3
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2
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283
views
Should I provide partialed functions based on API call in Clojure?
I am designing a library to wrap an API with Clojure. The API requires user credentials to authenticate user related calls.
My first approach was to have functions that do each task the API can do:
(...
- 139
3
votes
1
answer
201
views
Efficient algorithm for deducing object type dynamically based on members
I am designing a DSL (in clojure, specifically; though this question is more general than that) in which 'entities' are tracked as immutable hashes/maps, and where the 'concept' membership of an ...
- 345
3
votes
0
answers
428
views
Clojure: Decomposing Logging, Metrics, and Business Logic from a Function
I was reading the post A Modern Architecture for FP that included a code snippet that the author wanted to decompose further. I don't know Haskell but I recognize enough to know that I've written many ...
- 139
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1
answer
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What practical problem results from lack of hygienic macros in Clojure?
I've heard that Clojure macros are easier to write but not as reliable as Racket's hygienic macros. My question has 2 parts:
How does gensym differ from hygienic macros?
What do Racket macros provide ...
- 284
14
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3
answers
5k
views
If you can use def to redefine variables how is that considered immutable?
Trying to learn Clojure and you can't help but be told continually how Clojure is all about immutable data. But you can easily redefine a variable by using def right? I get that Clojure developers ...
- 319
2
votes
0
answers
381
views
Implement FSM explicitly in re-frame/reagent/react?
I'm in the process of making a simple game using re-frame (and thus react and reagent), but I'm stuck at one point.
In
https://github.com/Day8/re-frame#control-via-fsm
they claim
Not every app ...
- 675
3
votes
1
answer
177
views
How can you write an activation function in a neural network to handle a layer architecture of arbitrary dimensions?
I am making a neural network in Clojure that can take an array of integers,and return a data structure representing the layers of a neural network: so (make-layers [1 4 5]) would evaluate to:
[[0] ...
- 290
1
vote
1
answer
209
views
Clojure NameSpace Design
I am new to Clojure and trying to get a handle on organizing a project's namespaces. I am working on a solver for the knapsack problem. Currently, I have broken the modules into files, but everything ...
- 525