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Questions tagged [clojure-contrib]

Extensions and enhancements to the Clojure libraries.

108 questions
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Appending an element at nth index

I'm working on a function, which takes a vector (possibly nested vector) as input along with some quantity y and index n. Essentially the function would append y after the nth element in the vector and adjoin the remaining elements. So far I have…
sunspots
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Flipping elements in Clojure

If I input a vector and wanted to flip the elements' order, I'd write (reverse [1 2 3]) Now, how would I generalize this idea to be able to input nested vectors and flip the order of elements? Given a matrix A the function should reverse the…
sunspots
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Building a nested vector in Clojure

My goal is to build a nested vector of dimension n consisting of a single element p. As an example let me choose n=2 and p=1, so the output would be: [[1 1] [1 1]]
sunspots
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clojure contrib logging to file

Hi I have tried logging with clojure contrib but to no avail. Its clojure 1.1 (ns com.class.main.service (:gen-class) (:require (clojure.contrib [logging :as log]))) (log/info "Hello world") I have put a log4j.jar file in my bin and a…
sqwale
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Trying to use a Clojure-Contrib Graph function

I am having trouble getting the function fixed-point from Clojure-Contrib Graph to run. Admittedly the problem is trivial. I have tried to use the techniques shown in loading clojure-contrib but am still running into trouble. Note: I am using…
sunspots
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Testing vectors and nested vectors in Clojure

Is there a way in Clojure to test a vector and see if it's nested, i.e. a way to test [:a :b :c :d] vs. [[:a :b] [:c :d]]? I've tried the test (vector? [:a :b :c :d]) true but it remains true for nested vectors as well, (vector? [[:a :b] [:c…
sunspots
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Does Clojure map include level specification?

In trying to write a mapping function that applies a function, i.e inc, dec, etc. to the elements of an input vector. The output is a vector with the function applied to each element and an indexing element. Here is a sample of what I'm trying to…
sunspots
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Expanding the map function to handle nested segments

I am simply trying to rename the map function in Clojure to gain better exposure to arbitrary inputs. The function I wrote has problems with the number of args being passed. Namely, (defn new-map [f [& x]] (map f x)) Moreover, the end goal is…
sunspots
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Building tables in clojure

If I wanted to build a table in Clojure of vector duplicates, I'd write: (take 2 (repeat [1 2 3])) But how would I expand this notion of a table function to build something like: Input 1: [a^2 2 6 2] where a^2 is some input function, 2 is min…
sunspots
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Writing a tuples function that permutes all possible n-tuples

I'm working towards a tuples function, which takes collections and a parameter n. The parameter designates the number of indices the generated vector should have. The function then permutes all possible n-tuples of the elements in the collection. So…
sunspots
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Looking to write a spanning function with optional step input

I'm stuck trying to write a Clojure function that takes a span from a collection or vector. For example I'd like to manipulate a collection such as (:a :b :c :d :e :f :g :h) by taking the second element through the fifth in steps of two. Thus,…
sunspots
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Modifying the function count to return zero for strings and zero for numbers

I'm writing a function that can input strings, numbers, arrays, Java Collections and Maps. The constraints are the output for both strings and numbers should be zero. The Clojure function count does everything I need, except handle the constraints.…
sunspots
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Don't know how to create ISeq from: Symbol (logging.clj:13)

I have tried using require to get external libraries into my working name space but I keep getting the error "java.lang.RuntimeException: java.lang.IllegalArgumentException: Don't know how to create ISeq from: Symbol (logging.clj:13)" Below is my…
sqwale
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check if attribute with a specific value is present in zip/node using zip-filter library or another one

am new at clojure and would like to know how to check if an attribute with a specific value is present in a zip/node using the zip-filter library. Let us say I have the following xml content in a file named "myfile.xml" …
Horace
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Polymorphic I/O utility functions for Java 7 file I/O

Is there a library for I/O utility functions for Java 7 file I/O akin to clojure.java.io available in Clojure Contrib or elsewhere? Specifically, I'm interested in the utilities which could provide a Clojure-friendly, coercive API that make using…
yakshaver
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