/src/clojure_koans/strings.clj
Clojure | 68 lines | 46 code | 22 blank | 0 comment | 23 complexity | 4ab356f9b7e5e5debebebf6964a28d5d MD5 | raw file
- (ns clojure-koans.strings
- (:require [clojure.string :as string]))
-
- "A string is nothing more than text surrounded by double quotes"
- (= "hello" "hello")
-
- "But double quotes are just magic on top of something deeper"
- (= "world" (str 'world))
-
- "You can do more than create strings, you can put them together"
- (= "Cool right?" (str "Cool " "right?"))
-
- "You can even get certain characters"
- (= \C (get "Characters" 0))
-
- "Or even count the characters"
- (= 11 (count "Hello World"))
-
- "But strings and characters are not the same"
- (= false (= \c "c"))
-
- "What if you only wanted to get part of a string?"
- (= "World" (subs "Hello World" 6 11))
-
- "How about joining together elements in a list?"
- (= "123" (string/join '(1 2 3)))
-
- "What if you wanted to separate them out?"
- (= "1, 2, 3" (string/join ", " '(1 2 3)))
-
- "Maybe you want to separate out all your lines"
- (= ["1" "2" "3"] (string/split-lines "1\n2\n3"))
-
- "You may want to make sure your words are backwards"
- (= "olleh" (string/reverse "hello"))
-
- "Maybe you want to find the index of the first occurence of a substring"
- (= 0 (string/index-of "hello world" "h"))
-
- "Or maybe the last index of the same"
- (= 13 (string/last-index-of "hello world, hello" "hello"))
-
- "But when something doesn't exist, nothing is found"
- (= nil (string/index-of "hello world" "bob"))
-
- "Sometimes you don't want whitespace cluttering the front and back"
- (= "hello world" (string/trim " \nhello world \t \n"))
-
- "You can check if something is a char"
- (= true (char? \c))
-
- "But it may not be"
- (= false (char? "a"))
-
- "But chars aren't strings"
- (= false (string? \b))
-
- "Strings are strings"
- (= true (string? "true"))
-
- "Some strings may be blank"
- (= true (string/blank? ""))
-
- "Even if at first glance they aren't"
- (= true (string/blank? " \n \t "))
-
- "However, most strings aren't blank"
- (= false (string/blank? "hello?\nare you out there?"))