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Alex Grejuc 2018-07-10 15:34:42 -07:00
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1 changed files with 3 additions and 3 deletions
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@ -125,7 +125,7 @@ fst ("haskell", 1) -- "haskell"
snd ("haskell", 1) -- 1 snd ("haskell", 1) -- 1
-- pair element accessing does not work on n-tuples (i.e. triple, quadruple, etc) -- pair element accessing does not work on n-tuples (i.e. triple, quadruple, etc)
snd ("snd", "can't touch this", "da na na na") -- error! see function below to get around this snd ("snd", "can't touch this", "da na na na") -- error! see function below
---------------------------------------------------- ----------------------------------------------------
-- 3. Functions -- 3. Functions
@ -163,7 +163,7 @@ fib 2 = 2
fib x = fib (x - 1) + fib (x - 2) fib x = fib (x - 1) + fib (x - 2)
-- Pattern matching on tuples -- Pattern matching on tuples
sndOfTriple (_, y, _) = y -- you can use a wild card (_) to bypass naming an unused value sndOfTriple (_, y, _) = y -- use a wild card (_) to bypass naming unused value
-- Pattern matching on lists. Here `x` is the first element -- Pattern matching on lists. Here `x` is the first element
-- in the list, and `xs` is the rest of the list. We can write -- in the list, and `xs` is the rest of the list. We can write
@ -210,7 +210,7 @@ foo 5 -- 60
-- to a given parameter. In contrast to standard function application, which -- to a given parameter. In contrast to standard function application, which
-- has highest possible priority of 10 and is left-associative, the `$` operator -- has highest possible priority of 10 and is left-associative, the `$` operator
-- has priority of 0 and is right-associative. Such a low priority means that -- has priority of 0 and is right-associative. Such a low priority means that
-- the expression on its right is applied as the parameter to the function on its left. -- the expression on its right is applied as parameter to function on its left.
-- before -- before
even (fib 7) -- false even (fib 7) -- false