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Merge pull request #1703 from Gregly/function_composition

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Modify the function composition example to avoid two 5's
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ven 2015-10-20 21:40:49 +02:00
commit e596def97b
1 changed files with 4 additions and 4 deletions
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@ -195,11 +195,11 @@ foo 5 -- 15
-- function composition
-- the (.) function chains functions together.
-- For example, here foo is a function that takes a value. It adds 10 to it,
-- multiplies the result of that by 5, and then returns the final value.
foo = (*5) . (+10)
-- multiplies the result of that by 4, and then returns the final value.
foo = (*4) . (+10)
-- (5 + 10) * 5 = 75
foo 5 -- 75
-- (5 + 10) * 4 = 60
foo 5 -- 60
-- fixing precedence
-- Haskell has another operator called `$`. This operator applies a function