Merge 02a7234299 into e74a2664f0

src/koans/01_equalities.clj

@@ -3,37 +3,37 @@
 
 (meditations
   "We shall contemplate truth by testing reality, via equality"
-  (= __ true)
+  (= true true)
 
   "To understand reality, we must compare our expectations against reality"
-  (= __ (+ 1 1))
+  (= 2 (+ 1 1))
 
   "You can test equality of many things"
-  (= (+ 3 4) 7 (+ 2 __))
+  (= (+ 3 4) 7 (+ 2 5))
 
   "Some things may appear different, but be the same"
-  (= __ (= 2 2/1))
+  (= true (= 2 2/1))
 
   "You cannot generally float to heavens of integers"
-  (= __ (= 2 2.0))
+  (= false (= 2 2.0))
 
   "But a looser equality is also possible"
-  (= __ (== 2.0 2))
+  (= true (== 2.0 2))
 
   "Something is not equal to nothing"
-  (= __ (not (= 1 nil)))
+  (= true (not (= 1 nil)))
 
   "Strings, and keywords, and symbols: oh my!"
-  (= __ (= "hello" :hello 'hello))
+  (= false (= "hello" :hello 'hello))
 
   "Make a keyword with your keyboard"
-  (= :hello (keyword __))
+  (= :hello (keyword "hello"))
 
   "Symbolism is all around us"
-  (= 'hello (symbol __))
+  (= 'hello (symbol "hello"))
 
   "What could be equivalent to nothing?"
-  (= __ nil)
+  (= nil nil)
 
   "When things cannot be equal, they must be different"
-  (not= :fill-in-the-blank __))
+  (not= :fill-in-the-blank "word"))

src/koans/02_strings.clj

@@ -4,67 +4,67 @@
 
 (meditations
   "A string is nothing more than text surrounded by double quotes"
-  (= __ "hello")
+  (= "hello" "hello")
 
   "But double quotes are just magic on top of something deeper"
-  (= __ (str 'world))
+  (= "world" (str 'world))
 
   "You can do more than create strings, you can put them together"
-  (= "Cool right?" (str __ __))
+  (= "Cool right?" (str 'Cool " right?"))
 
   "You can even get certain characters"
-  (= \C (get "Characters" __))
+  (= \C (get "Characters" 0))
 
   "Or even count the characters"
-  (= __ (count "Hello World"))
+  (= 11 (count "Hello World"))
 
   "But strings and characters are not the same"
-  (= __ (= \c "c"))
+  (= false (= \c "c"))
 
   "What if you only wanted to get part of a string?"
-  (= "World" (subs "Hello World" __ __))
+  (= "World" (subs "Hello World" 6 11))
 
   "How about joining together elements in a list?"
-  (= __ (string/join '(1 2 3)))
+  (= "123" (string/join '(1 2 3)))
 
   "What if you wanted to separate them out?"
-  (= "1, 2, 3" (string/join __ '(1 2 3)))
+  (= "1, 2, 3" (string/join ", " '(1 2 3)))
 
   "Maybe you want to separate out all your lines"
-  (= [__ __ __] (string/split-lines "1\n2\n3"))
+  (= ["1" "2" "3"] (string/split-lines "1\n2\n3"))
 
   "You may want to make sure your words are backwards"
-  (= __ (string/reverse "hello"))
+  (= "olleh" (string/reverse "hello"))
 
   "Maybe you want to find the index of the first occurrence of a substring"
-  (= 0 (string/index-of "hello world" __))
+  (= 0 (string/index-of "hello world" "h"))
 
   "Or maybe the last index of the same"
-  (= __ (string/last-index-of "hello world, hello" "hello"))
+  (= 13 (string/last-index-of "hello world, hello" "hello"))
 
   "But when something doesn't exist, nothing is found"
-  (= __ (string/index-of "hello world" "bob"))
+  (= nil (string/index-of "hello world" "bob"))
 
   "Sometimes you don't want whitespace cluttering the front and back"
-  (= __ (string/trim "  \nhello world \t \n"))
+  (= "hello world" (string/trim "  \nhello world \t \n"))
 
   "You can check if something is a char"
-  (= __ (char? \c))
+  (= true (char? \c))
 
   "But it may not be"
-  (= __ (char? "a"))
+  (= false (char? "a"))
 
   "But chars aren't strings"
-  (= __ (string? \b))
+  (= false (string? \b))
 
   "Strings are strings"
-  (= true (string? __))
+  (= true (string? "b"))
 
   "Some strings may be blank"
-  (= __ (string/blank? ""))
+  (= true (string/blank? ""))
 
   "Even if at first glance they aren't"
-  (= __ (string/blank? " \n \t  "))
+  (= true (string/blank? " \n \t  "))
 
   "However, most strings aren't blank"
-  (= __ (string/blank? "hello?\nare you out there?")))
+  (= false (string/blank? "hello?\nare you out there?")))

src/koans/03_lists.clj

@@ -3,43 +3,43 @@
 
 (meditations
   "Lists can be expressed by function or a quoted form"
-  (= '(__ __ __ __ __) (list 1 2 3 4 5))
+  (= '(1 2 3 4 5) (list 1 2 3 4 5))
 
   "They are Clojure seqs (sequences), so they allow access to the first"
-  (= __ (first '(1 2 3 4 5)))
+  (= 1 (first '(1 2 3 4 5)))
 
   "As well as the rest"
-  (= __ (rest '(1 2 3 4 5)))
-
+  (= '(2 3 4 5) (rest '(1 2 3 4 5)))
+  
   "Count your blessings"
-  (= __ (count '(dracula dooku chocula)))
+  (= 3 (count '(dracula dooku chocula)))
 
   "Before they are gone"
-  (= __ (count '()))
+  (= 0 (count '()))
 
   "The rest, when nothing is left, is empty"
-  (= __ (rest '(100)))
+  (= '() (rest '(100)))
 
   "Construction by adding an element to the front is easy"
-  (= __ (cons :a '(:b :c :d :e)))
+  (= '(:a :b :c :d :e) (cons :a '(:b :c :d :e)))
 
   "Conjoining an element to a list isn't hard either"
-  (= __ (conj '(:a :b :c :d) :e))
+  (= '(:e :a :b :c :d) (conj '(:a :b :c :d) :e))
 
   "You can use a list like a stack to get the first element"
-  (= __ (peek '(:a :b :c :d :e)))
+  (= :a (peek '(:a :b :c :d :e)))
 
   "Or the others"
-  (= __ (pop '(:a :b :c :d :e)))
+  (= '(:b :c :d :e) (pop '(:a :b :c :d :e)))
 
   "But watch out if you try to pop nothing"
-  (= __ (try
+  (= "No dice!" (try
           (pop '())
           (catch IllegalStateException e
             "No dice!")))
 
   "The rest of nothing isn't so strict"
-  (= __ (try
+  (= () (try
           (rest '())
           (catch IllegalStateException e
             "No dice!"))))

src/koans/04_vectors.clj

@@ -3,31 +3,31 @@
 
 (meditations
   "You can use vectors in clojure as array-like structures"
-  (= __ (count [42]))
+  (= 1 (count [42]))
 
   "You can create a vector from a list"
-  (= __ (vec '(1)))
+  (= [1] (vec '(1)))
 
   "Or from some elements"
-  (= __ (vector nil nil))
+  (= [nil nil] (vector nil nil))
 
   "But you can populate it with any number of elements at once"
-  (= [1 __] (vec '(1 2)))
+  (= [1 2] (vec '(1 2)))
 
   "Conjoining to a vector is different than to a list"
-  (= __ (conj [111 222] 333))
+  (= [111 222 333] (conj [111 222] 333))
 
   "You can get the first element of a vector like so"
-  (= __ (first [:peanut :butter :and :jelly]))
+  (= :peanut (first [:peanut :butter :and :jelly]))
 
   "And the last in a similar fashion"
-  (= __ (last [:peanut :butter :and :jelly]))
+  (= :jelly (last [:peanut :butter :and :jelly]))
 
   "Or any index if you wish"
-  (= __ (nth [:peanut :butter :and :jelly] 3))
+  (= :jelly (nth [:peanut :butter :and :jelly] 3))
 
   "You can also slice a vector"
-  (= __ (subvec [:peanut :butter :and :jelly] 1 3))
+  (= [:butter :and] (subvec [:peanut :butter :and :jelly] 1 3))
 
   "Equality with collections is in terms of values"
-  (= (list 1 2 3) (vector 1 2 __)))
+  (= (list 1 2 3) (vector 1 2 3)))

src/koans/05_sets.clj

@@ -4,19 +4,19 @@
 
 (meditations
   "You can create a set by converting another collection"
-  (= #{3} (set __))
+  (= #{3} (set '(3)))
 
   "Counting them is like counting other collections"
-  (= __ (count #{1 2 3}))
+  (= 3 (count #{1 2 3}))
 
   "Remember that a set is a *mathematical* set"
-  (= __ (set '(1 1 2 2 3 3 4 4 5 5)))
+  (= #{1 2 3 4 5} (set '(1 1 2 2 3 3 4 4 5 5)))
 
   "You can ask clojure for the union of two sets"
-  (= __ (set/union #{1 2 3 4} #{2 3 5}))
+  (= #{1 2 3 4 5} (set/union #{1 2 3 4} #{2 3 5}))
 
   "And also the intersection"
-  (= __ (set/intersection #{1 2 3 4} #{2 3 5}))
+  (= #{2 3} (set/intersection #{1 2 3 4} #{2 3 5}))
 
   "But don't forget about the difference"
-  (= __ (set/difference #{1 2 3 4 5} #{2 3 5})))
+  (= #{1 4} (set/difference #{1 2 3 4 5} #{2 3 5})))