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How to use the reverse method in Clojure on a sequence
Chinweuba Elijah AzubuikeClojure’s reverse method returns a sequence with its order reversed. A Clojure sequence is a data storage structure that holds a collection of data objects. It can be seen as a logical list. The seq method builds a sequence.
The code snippet below shows the use of the reverse method:
(reverse seq1)
seq1 is the sequence being inputted, and its reverse will be returned.
The reverse method accepts one input argument: a Clojure sequence. The input argument in the code snippet above is seq1. The reverse method returns a sequence with the same elements as the input sequence but with their order reversed. When the code snippet is executed, it returns a sequence containing all values in seq1 with their order reversed. Let’s look at an example.
Example
(ns clojure.examples.example (:gen-class)) (defn revers [] (def seq1 (seq [1 2 8 9 1 0 6 8 2])) (println (reverse seq1))) (revers)
Click "Run" to see the results. Please observe that the output sequence has the same elements as seq1 but with the order reversed. Try changing the values in seq1, click "Run" again, and observe the results.
Explanation
- Line 3: We define a function,
revers. - Line 4: We define a sequence named
seq1using theseqmethod. - Line 5: We use the
reversemethod to reverse the order of elements inseq1and useprintlnto print the result returned byreverse. - Line 6: We call the defined
reversfunction.
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clojure sequence
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