58 lines
1.4 KiB
Markdown
58 lines
1.4 KiB
Markdown
# Accumulate
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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.
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For example, given the collection of numbers:
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- 1, 2, 3, 4, 5
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And the operation:
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- square a number
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Your code should be able to produce the collection of squares:
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- 1, 4, 9, 16, 25
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Check out the test suite to see the expected function signature.
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## Restrictions
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Keep your hands off that collect/map/fmap/whatchamacallit functionality
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provided by your standard library!
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Solve this one yourself using other basic tools instead.
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Elixir specific: it's perfectly fine to use `Enum.reduce` or
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`Enumerable.reduce`.
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Lisp specific: it's perfectly fine to use `MAPCAR` or the equivalent,
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as this is idiomatic Lisp, not a library function.
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### Getting started
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First install lua and [luarocks][2] using [homebrew][1]
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$ brew install lua
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Then install [busted][3] testing framework for lua
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$ luarocks install busted
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Then run your test
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$ busted bob_test.lua
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Other resources
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1. [Lua Style Guide][4]
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2. [Learn Lua in 15 minutes][5]
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[1]: http://brew.sh/
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[2]: http://luarocks.org/
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[3]: http://olivinelabs.com/busted/
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[4]: https://github.com/Olivine-Labs/lua-style-guide
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[5]: http://tylerneylon.com/a/learn-lua/
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## Source
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Conversation with James Edward Gray II [view source](https://twitter.com/jeg2)
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