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CziSKY committed Jul 23, 2023
1 parent 76b279a commit 742385c
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24 changes: 12 additions & 12 deletions src/koans/01_equalities.clj
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Expand Up @@ -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 nil))
44 changes: 22 additions & 22 deletions src/koans/02_strings.clj
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Expand Up @@ -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))

"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 substring"
(= __ (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? "string"))

"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?")))

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