clojure-koans/resources/koans.clj
2015-07-12 17:17:48 -07:00

233 lines
7.7 KiB
Clojure

[["01_equalities" {"__" [true
2
5
true
false
true
true
false
"hello"
"hello"
3]}]
["02_lists" {"__" [1 2 3 4 5
1
[2 3 4 5]
3
0
()
[:a :b :c :d :e]
[:e :a :b :c :d]
:a
[:b :c :d :e]
"No dice!"
()]}]
["03_vectors" {"__" [1
[1]
[nil nil]
2
[111 222 333]
:peanut
:jelly
:jelly
[:butter :and]
3]}]
["04_sets" {"__" [[3]
3
#{1 2 3 4 5}
#{1 2 3 4 5}
#{2 3}
#{1 4}]}]
["05_maps" {"__" [:b 2
1
2
2
1
1
"Sochi"
nil
:key-not-found
true
false
"February"
1 "January"
2010 2014 2018
"PyeongChang" "Sochi" "Vancouver"]}]
["06_functions" {"__" [81
20
10
60
15
30]
"___" [+
*
(fn [f] (f 5))
(fn [f] (f 5))]}]
["07_conditionals" {"__" [:a
[]
nil
:glory
4 6 :your-road
1
:bicycling
"is that even exercise?"]}]
["08_higher_order_functions" {"__" [4 8 12
(* x x)
[false false true false false]
()
[:anything :goes :here]
(< x 31)
(* 10 x) (< x 4)
24
100
(count a) (count b)]}]
["09_runtime_polymorphism" {"__" [(str (:name a) " eats veggies.")
(str (:name a) " eats animals.")
(str "I don't know what " (:name a) " eats.")
"Hello World!"
"Hello, you silly world."
"Hello to this group: Peter, Paul, Mary!" ]}]
["10_lazy_sequences" {"__" [[1 2 3 4]
[0 1 2 3 4]
10
95
(range 20)
:a]
"___" [(fn [x] x)]}]
["11_sequence_comprehensions" {"__" [[0 1 2 3 4 5]
(* x x)
(range 10)
(odd? x) (* x x)
[row column]
]}]
["12_creating_functions" {"__" [true false true
4
:a :b :c :d
:c :d
4
8]
"___" [(complement nil?)
multiply-by-5
(comp dec square)]}]
["13_recursion" {"__" [true
acc
(loop [coll coll
acc ()]
(if (seq coll)
(recur (rest coll) (conj acc (first coll)))
acc))
(loop [n n
acc 1]
(if (zero? n)
acc
(recur (dec n) (* acc n))))]
"___" [not]}]
["14_destructuring" {"__" [":bar:foo"
(format (str "An Oxford comma list of %s, "
"%s, "
"and %s.")
a b c)
(apply str
(interpose " "
(apply list
first-name
last-name
(interleave (repeat "aka") aliases))))
{:original-parts full-name
:named-parts {:first first-name :last last-name}}
(str street-address ", " city ", " state)
city state
(str street-address ", " city ", " state)]
"___" [(fn [[fname lname]
{:keys [street-address city state]}]
(str fname " " lname ", "
street-address ", " city ", " state))
]}]
["15_refs" {"__" ["hello"
"hello"
"better"
"better!!!"
(dosync (ref-set the-world 0))
(map :jerry [@the-world @bizarro-world])
]
"___" [(fn [x] (+ 20 x))]}]
["16_atoms" {"__" [0
1
(swap! atomic-clock (partial + 4))
20
20
atomic-clock 20 :fin
]}]
["17_macros" {"__" [~(first form)
~(nth form 2)
form
(drop 2 form)
"Hello, Macros!"
10
'(+ 9 1)
'(* 10 2)
'(+ 10 (2 * 3))]}]
["18_datatypes" {"__" [(print
(str "You're really the "
(.category this)
", " recipient "... sorry."))
"peace"
"literature"
"physics"
nil
[true false]
(str "Congratulations on your Best Picture Oscar, "
"Evil Alien Conquerors!")]}]
["19_java_interop" {"__" [java.lang.String
"SELECT * FROM"
10
1024
]
"___" [#(.toUpperCase %)
]
}]
["20_partition" {"__" [partition
[:a :b :c]
'((0 1 2) (3 4))
5
:hello
(6 :these :are)
]}]
["21_group_by" {"__" [odd?
{5 ["hello" "world"] 3 ["foo" "bar"]}
{1 [{:name "Bob" :id 1}
{:last-name "Smith" :id 1}]
2 [{:name "Jennifer" :id 2}]}
nil
{:naughty-list [{:name "Jimmy" :bad true}
{:name "Joe" :bad true}]
:nice-list [{:name "Jane" :bad false}]}]}]
["22_meta" {"__" [{:league "National League"}
{:division "West"}
"This doesn't implement the IObj interface"
{:foo :bar}
nil
\C
inc
:park "AT&T Park"
'Giants
"Giants"]}]
]