clj | : koala : Lazy iterators in Python | Functional Programming library
kandi X-RAY | clj Summary
kandi X-RAY | clj Summary
clj is a collection of functions to work with lazy iterators in Python. It’s a module for those times when you did too much Clojure and came back to Python wondering where are all these distinct, drop-while, cycle, first, etc. The library is oriented toward laziness and performance. Functions are implemented with as little overhead as possible.
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- Apply a function to each element of a collection
- Return an iterable of elements from the collection
- Consume elements from iterable
- Return the first item in the collection
- Return the first occurrence of x
- Removes n elements from collection
- Returns the rest of a collection
- Return the first value in a collection
- Returns a function that computes the given functions
- Returns an iterator of integers
- Return a function that returns a constant
- Returns a new iterable containing the elements of the given collection
- Iterate over a collection yielding each element of the collection
- Returns True if the predicate evaluates to false otherwise
- Returns True if all elements in the collection have the predicate pred
- Return the first element of the collection that satisfies the predicate
- Make a predicate function
- Drop the last n elements from the collection
- Yield all occurrences of the given collection
- Splits a collection by a predicate
- Return n items from collection
- Returns the first item of an iterable
- Splits a collection into two collections
- Empty collection
- Returns True if predicate evaluates to True
- Return the first item in a collection
clj Key Features
clj Examples and Code Snippets
Community Discussions
Trending Discussions on clj
QUESTION
I'm very new to the cljs. I'm practicing the cljs with re-frame. I faced an issue to access a method of js instance.
...ANSWER
Answered 2021-Jun-13 at 08:38It is due to lacking externs. Add ^js in front of @editor:
QUESTION
This question is off the back of a previous question I asked here a few days ago. One of the comments was that I should dispense with the Ring middleware for extracting query parameters and write my own. One alternative that I thought I'd play with was harnessing the existing one to get what I want and I've been doing some digging into the Ring source code. It does almost exactly what I want. If I write out how I understand it works:
- A middleware has the function wrap-params which calls params-request
- params-request adds a
paramsmap to therequestmap, callsassoc-query-params - assoc-query-params eventually calls ring.util.codec/form-decode on the incoming query string to turn it into a map
- form-decode uses assoc-conj to merge values into an existing map via reduce
- assoc-conj's docstring says
Associate a key with a value in a map. If the key already exists in the map, a vector of values is associated with the key.
This last function is the one that is problematic in my previous question (TL;DR: I want the map's values to be consistent in class of either a string or a vector). With my object orientated hat on I would have easily solved this by subclassing and overriding the method that I need the behaviour changed. However for Clojure I cannot see how to just replace the one function without having to alter everything up the stack. Is this possible and is it easy, or should I be doing this another way? If it comes to it I could copy the entire middleware library and the codec one, but it seems a bit heavyweight to me.
...ANSWER
Answered 2021-Jun-09 at 09:22I disagree with the advice to not use Ring's param middleware. It gives you perfect information about the incoming parameters, so you if you don't like the default behavior of string-or-list, you can change the parameters however you want.
There are numerous ways to do this, but one obvious approach would be to write your own middleware, and insert it in between Ring's param middleware and your handlers.
QUESTION
I have a bunch of maps that describe locations:
...ANSWER
Answered 2021-Jun-03 at 09:27The code below seems to work. Improvement proposals are still welcome.
QUESTION
I inherited a bunch of code which I am trying to translate from Lisp to Clojure. Clearly there are "cultural" differences as well as the syntactical ones. Without boring anyone with the reasons why, here's my problem.
...ANSWER
Answered 2021-Jun-02 at 14:57QUESTION
I have defined two macros:
...ANSWER
Answered 2021-Jun-02 at 14:26It looks like you wrote ~propertys but meant ~@propertys. You want to splice each of the property declarations into the defclass, instead of combining them into a list. Making this change removes the trailing list of Nones.
QUESTION
TL;DR
how to reduce below repeated code, like create two job / trigger from job-inventory, instead of repeat twice and create terms
ANSWER
Answered 2021-Jun-01 at 10:32The key thing to remember is that functions are data. Whilst you can't dynamically create types very easily (as opposed to instances that implement an interface, via reify), you can statically create a class which then proxies your functions.
First let's make the :task of the job-inventory a function.
QUESTION
I've been working on the assumption that a var's metadata is "stable," that is, I can change the var's value without changing the var's metadata. Now I see there's something wrong with my understanding. Code:
...ANSWER
Answered 2021-Jun-01 at 06:42alter-var-root can do that.
QUESTION
I have create a project with two files core.clj and module.clj. On core.clj to be able to use function of module.clj I have declared :
...ANSWER
Answered 2021-May-27 at 16:11You must refactor to avoid dependency cycles. This is a feature of Clojure, not a requirement added by Cider or waived by Leiningen. "Building a jar" of Clojure stuff just means zipping it up, and thus is not a sign that the stuff is error-free.
QUESTION
It is possible to subseq a sorted collection in clojure like so:
...ANSWER
Answered 2021-May-11 at 06:13According to the docs of subseq,
the test parameter of the function must be one of <, <=, > or >=.
This is because it will be used to compare 0 to the result of the sorted collection's comparator function called on the elements. (Remember that < returns boolean values, however, t/< returns an integer.)
So instead of
QUESTION
I am trying to call some Clojure code from Java, but I get this error when trying to "require" the file:
...ANSWER
Answered 2021-May-08 at 15:49Here is a full minimal working version showing Clojure called from Java.
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