exercism fetch php accumulate


Implement the accumulate operation, which, given a collection and an operation to perform on each element of the collection, returns a new collection containing the result of applying that operation to each element of the input collection.

Given the collection of numbers:

And the operation:

Your code should be able to produce the collection of squares:

Check out the test suite to see the expected function signature.


Keep your hands off that collect/map/fmap/whatchamacallit functionality provided by your standard library! Solve this one yourself using other basic tools instead.

Lisp specific: it's perfectly fine to use MAPCAR or the equivalent, as this is idiomatic Lisp, not a library function.

Making the Test Suite Pass

  1. Get PHPUnit.

    % wget --no-check-certificate https://phar.phpunit.de/phpunit.phar
    % chmod +x phpunit.phar
  2. Execute the tests for an assignment.

    % phpunit.phar wordy/wordy_test.php


Conversation with James Edward Gray II https://twitter.com/jeg2

Submitting Incomplete Solutions

It's possible to submit an incomplete solution so you can see how others have completed the exercise.