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CLOJURE QUESTIONS

why records are not functions?
why records are not functions?
To fix this issue Others have answered this, but here's how you make one of your defrecord types implement the IFn interface:
TAG : clojure
Date : November 10 2020, 07:00 PM , By : Wayne Redelinghuys
Hidden features of Clojure
Hidden features of Clojure
this will help Clojure has an immutable, persistent queue datatype, PersistentQueue, but it doesn't (yet?) have literal reader syntax or Clojure wrapper functions, so you have to create one via a Java call. Queues conj (push) onto the rear and pop fr
TAG : clojure
Date : November 08 2020, 07:01 PM , By : thiga
Function look-up in clojure
Function look-up in clojure
To fix this issue Help me I need to write look up function that finds value in the list-of-lists in that every element is in order (key value). For example
TAG : clojure
Date : November 04 2020, 07:01 PM , By : Guillaume Guerin
Right way to change a value on a map on clojure
Right way to change a value on a map on clojure
Any of those help assoc does not take a function as its last argument; unless you were wanting to associate a function with a key in the map. (assoc mymap :a 5) does what you want.I'll add though, update, which does take a function, could be used her
TAG : clojure
Date : October 31 2020, 08:00 PM , By : sattt
How to obtain paths to all the child nodes in a tree that only have leaves using clojure zippers?
How to obtain paths to all the child nodes in a tree that only have leaves using clojure zippers?
Hope that helps Hiccup-style structures are a nice place to visit, but I wouldn't want to live there. That is, they're very succinct to write, but a giant pain to manipulate programmatically, because the semantic nesting structure is not reflected in
TAG : clojure
Date : October 24 2020, 06:10 PM , By : Rayies Banka
Is there a threaded way to perform an "or" (or any test) condition in clojure?
Is there a threaded way to perform an "or" (or any test) condition in clojure?
wish help you to fix your issue I'd use some here. It's essentially a sequence friendly or check that can help cut down on duplication when all the conditions are basically the same:
TAG : clojure
Date : October 14 2020, 02:00 PM , By : Vaisakh V
Rank elements in a sequence in clojure
Rank elements in a sequence in clojure
Hope this helps You can use sort-by to order the input sequence and then use map-indexed to convert it into a rank:
TAG : clojure
Date : October 13 2020, 01:00 PM , By : Justin Lepard
Hot to fix "WARNING: any? already refers to: #'clojure.core/any? in namespace: leiningen.midje, being replaced by:
Hot to fix "WARNING: any? already refers to: #'clojure.core/any? in namespace: leiningen.midje, being replaced by:
hope this fix your issue This particular issue was solved in this Pull Request.For the general case you can get rid of this warning (when it comes from your code) by excluding (= un-refering) the symbol you want to require from another namespace than
TAG : clojure
Date : October 13 2020, 12:00 AM , By : Elasri Abdelati
Is is possible to read from an input file and convert each line of the text file into a vector of strings?
Is is possible to read from an input file and convert each line of the text file into a vector of strings?
it should still fix some issue Go step by step.Read data (As file is small, just slurp). Let's name the file grid.txt
TAG : clojure
Date : October 12 2020, 11:00 PM , By : Meshal
How to print elements in a vector of vectors
How to print elements in a vector of vectors
like below fixes the issue You can use cl-format to handle list (and list of list in this case) with a control string:
TAG : clojure
Date : October 12 2020, 09:00 PM , By : Tony Walker
How to mental model this clojure fibonacci generator?
How to mental model this clojure fibonacci generator?
I wish this helpful for you Macroexpanding (lazy-cat [0 1] (map + (rest fib-seq) fib-seq) leads to:
TAG : clojure
Date : October 11 2020, 12:00 PM , By : cobb
How to merge items in a clojure list by types?
How to merge items in a clojure list by types?
may help you . It is a little bit complicated, but since you asked for flexibility, there you go:
TAG : clojure
Date : October 11 2020, 11:00 AM , By : Babitha
Clojure: delete item from a ref?
Clojure: delete item from a ref?
will be helpful for those in need As there error says, you're trying to iterate a function. This is coming about because when you write:
TAG : clojure
Date : October 10 2020, 07:00 AM , By : Barclay0x00
How to setup figwheel-main to reload code served by clojure backend
How to setup figwheel-main to reload code served by clojure backend
Hope this helps Please keep in mind that you have two programs running now, one in CLJS in the browser and another one in CLJ on the backend. They communicate over the network which adds in more complexity.If you are already using Reagent in your CLJ
TAG : clojure
Date : October 10 2020, 02:00 AM , By : Pradeep Joseph
How to split a vector of CLI arguments into pairs in Clojure?
How to split a vector of CLI arguments into pairs in Clojure?
I think the issue was by ths following , To split them into pairs, use partition:
TAG : clojure
Date : October 09 2020, 04:00 PM , By : justSomeKid
How to create a spec where all keys are optional but at least one of the specified keys should be present?
How to create a spec where all keys are optional but at least one of the specified keys should be present?
seems to work fine With the current spec alpha, in order to use the same key collection for both the keys spec and the at-least-one-exists check, you'll need to use a macro. (The upcoming spec 2 alpha addresses this by exposing more data-driven APIs
TAG : clojure
Date : October 08 2020, 10:00 PM , By : Harinder
Why use empty over count?
Why use empty over count?
Any of those help To determine whether a Clojure list has any items wouldn't it be more efficient (space + memory-wise) to use (zero? (count coll)) over (empty? coll) which creates a seq? , count itself is not always the constant time function:
TAG : clojure
Date : October 08 2020, 03:00 PM , By : MIchael
Why isn't there an alter-var-root in clojurescript?
Why isn't there an alter-var-root in clojurescript?
around this issue Clojurescript doesn't have vars. They're just globals you can set! like any other object property.
TAG : clojure
Date : October 08 2020, 12:00 PM , By : Art18
practical use of lazy sequences
practical use of lazy sequences
I wish did fix the issue. They produce their results on-demand and can stop producing whenever necessary. That enables things like infinite seqs, parallelization of processing, combining operations and avoiding temporary storage (which can be further
TAG : clojure
Date : October 06 2020, 11:00 AM , By : Phoenix
How to read input from the end of printed line in Clojure?
How to read input from the end of printed line in Clojure?
will be helpful for those in need If you do the (read-line) inside the print it will be executed first (blocks and waits for the user-input, then the "question" and the user input will be printed).Instead use do to execute multiple things one after a
TAG : clojure
Date : October 06 2020, 06:00 AM , By : Thippani Manjula
Need a small example on how to write a function in clojure
Need a small example on how to write a function in clojure
it should still fix some issue Need a small example on how to write a function taking a string param (like [id]) and return that string with a random int attached to it (id-123)) , I think this is what you need:
TAG : clojure
Date : October 04 2020, 08:00 PM , By : 김재만
Clojure set and hash-set returns unordered value
Clojure set and hash-set returns unordered value
I hope this helps . Set returns unique elements of a collection. Elements in a set are unordered, meaning no particular order of elements is guaranteed (see https://clojuredocs.org/clojure.core/set).If you want a particular ordering use sorted-set (h
TAG : clojure
Date : October 03 2020, 09:00 PM , By : Zalabany
How to cycle through a list with an offset?
How to cycle through a list with an offset?
I wish this helpful for you What is the best way / easiest way to cycle through a list with an offset? , Here's a more idiomatic way
TAG : clojure
Date : October 03 2020, 05:00 AM , By : Brianna Wilson
"Thread-first" macro and "thread-last" macro from Clojure implemented on Scheme?
"Thread-first" macro and "thread-last" macro from Clojure implemented on Scheme?
I wish this helpful for you The answer depends on the question: which Scheme dialect are you using? Because in Racket we already have threading macros, so there's no need to implement them :) . In particular, ~> and ~>> are supported, among others. P
TAG : clojure
Date : October 03 2020, 02:00 AM , By : DisplayName=
Ways of accessing nested map values in Clojure?
Ways of accessing nested map values in Clojure?
like below fixes the issue I am currently using the two following blocks of code to access nested values in ClojureScript: , Keys can be used as operators to retrieve its value like so:
TAG : clojure
Date : October 03 2020, 01:00 AM , By : Dave T.
:on-click renders as text
:on-click renders as text
around this issue I'm not sure how the rest of your project is structured, but it looks like the property map and inner html of the div you're trying to render are transposed.The reason that the rendered model appears that way is that reagent sees th
TAG : clojure
Date : October 02 2020, 08:00 PM , By : Manish Sharma
ClojureScript function prints strings, but will not return hiccup
ClojureScript function prints strings, but will not return hiccup
like below fixes the issue For one, def and defn create global bindings. In order to create local bindings, use let or letfn:
TAG : clojure
Date : October 02 2020, 08:00 PM , By : Nicole Keister
What is the correct way to dynamically render components in reagent?
What is the correct way to dynamically render components in reagent?
this one helps. Dynamically rendering components in React is fundamental to its use. It's very easy to do as can be seen here:
TAG : clojure
Date : October 02 2020, 07:00 PM , By : mimmus
How to filter a map comparing it with another collection
How to filter a map comparing it with another collection
this will help One problem is that you start out with a sequence of N maps, then you try to stuff them into a single map. This will cause the last one to overwrite the first one.Instead, you need to have the output be a sequence of M maps (M
TAG : clojure
Date : October 02 2020, 11:00 AM , By : aiwu sun
Counting letters of a string in Clojure
Counting letters of a string in Clojure
may help you . Use frequencies (part of clojure.core)Description: https://clojuredocs.org/clojure.core/frequencies
TAG : clojure
Date : October 02 2020, 09:00 AM , By : Dyr
loop/recur is producing infinite abrupt results while the answer is correct for 1st value of collection
loop/recur is producing infinite abrupt results while the answer is correct for 1st value of collection
like below fixes the issue You have your arguments to recur the wrong way round. You're binding (rest values) to f and (conj f y) to values in the recur call, so values will never be empty.
TAG : clojure
Date : October 02 2020, 05:00 AM , By : lucas
How to iterate through a list and make lists of the elements
How to iterate through a list and make lists of the elements
Any of those help There are two problems that I can see: makelist has (for [i [l]] ...) so it only produces a single item where i is bound to the whole of the incoming list l -- what you want here is (for [i l] ...) so that each element of l is proce
TAG : clojure
Date : October 01 2020, 02:00 AM , By : Payal Patel
How to rename a clojure file and namespace
How to rename a clojure file and namespace
Hope that helps if you are using emacs for clojure development, you could be aware of the cool clj-refactorUnder the hood it uses the refactor-nrepl clojure library. So you can employ it's api for programmatic refactoring.
TAG : clojure
Date : September 30 2020, 01:00 AM , By : timur9981
Mapping a string using a map
Mapping a string using a map
I wish this help you When mapping over a string, it will treat the string as a sequence of characters. So, your code ends up looking for a \G and a \C entry in the map, which both return nil.
TAG : clojure
Date : September 30 2020, 01:00 AM , By : Vikram Ns
Generating Data Matrix in Clojure
Generating Data Matrix in Clojure
Does that help Edit: Like this. I don't know of any specific library but you could easily implement this in Quil? Here is an example of the Game of Life in Quil that's very similar to what you are looking for.
TAG : clojure
Date : September 29 2020, 05:00 AM , By : Usman
Function argument with maps in Clojure
Function argument with maps in Clojure
Hope this helps I'm getting my feet wet with Clojure the past couple of day and came across this piece of code: , [new-map [key value]] mean the function expect two argument:
TAG : clojure
Date : September 28 2020, 03:00 AM , By : Peter
Recursive/nested with "rest" parameters
Recursive/nested with "rest" parameters
I wish did fix the issue. The problem, I think, is that there's a mismatch between what you are doing in the top level call and then in the recursive calls. In the top level call, you have a map and multiple key/value pairs, but in the recursive call
TAG : clojure
Date : September 27 2020, 02:00 AM , By : Colin H.
How to join a vector of strings with a delimiter prepended to each string?
How to join a vector of strings with a delimiter prepended to each string?
I think the issue was by ths following , Calling (clojure.string/join coll) with no separator is the same as (apply str coll) which is a tiny win:
TAG : clojure
Date : September 25 2020, 06:00 PM , By : Martin Carr
Clojure. Update double nested value
Clojure. Update double nested value
hop of those help? also, there is a nice library for that kind of structural editing, called specteryour case could be solved like this:
TAG : clojure
Date : September 23 2020, 06:00 PM , By : Ishaan
How can I continue running with repl after -main instead of exit?
How can I continue running with repl after -main instead of exit?
hope this fix your issue , Try this:
TAG : clojure
Date : September 21 2020, 10:00 AM , By : Ayush Aryan
Clojure equivalent of "Actors"
Clojure equivalent of "Actors"
wish of those help Rich Hickey in his 2008 talk "Clojure Concurrency" explicitly distinguishes agents from actors, mentioning several ways that they are different from each other. Search for "agent" and "actor" in the transcript of this talk if you w
TAG : clojure
Date : September 21 2020, 06:00 AM , By : Zeeshan Nawaz
Clojure is-prime function?
Clojure is-prime function?
I hope this helps you . If you format your code per Clojure conventions, it's pretty clear what the problem is:
TAG : clojure
Date : September 21 2020, 04:00 AM , By : jinmong
How to calculate the sum of all depths in a tree using basic `recur`?
How to calculate the sum of all depths in a tree using basic `recur`?
it helps some times recur is for tail recursion, meaning if you could do it with normal recursion, where the return value is exactly what a single recursive call would return, then you can use it.Most functions on trees cannot be written in a straigh
TAG : clojure
Date : September 20 2020, 04:00 PM , By : Hemsingh Rajpurohit
Prevent symbol call on require in Clojure
Prevent symbol call on require in Clojure
To fix this issue Without changing the code in namespace abc.xyz, in particular changing the line (db/init some-config), what you ask is not possible.A more productive approach would be to ask "How do other people handle this situation, without havin
TAG : clojure
Date : September 12 2020, 07:00 PM , By : varalakshmi
What’s the idiomatic way to guarantee some unknown value is inside a sequence?
What’s the idiomatic way to guarantee some unknown value is inside a sequence?
it fixes the issue This sort of thing -- working with a value that may or may not be a sequence -- is just not idiomatic. See https://stuartsierra.com/2015/06/10/clojure-donts-heisenparameter where he specifically calls this out.Refactor your code so
TAG : clojure
Date : August 26 2020, 05:00 AM , By : Tulio Guerrero
How can I later get access to something created in a let
How can I later get access to something created in a let
help you fix your problem it could be possible, if you expose one more function, say :update, enclosing the inum value.
TAG : clojure
Date : August 22 2020, 10:00 AM , By : Ben Birdsall
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