Merge pull request #4 from dlane-latacora/strings-clj

Strings Clj is completed
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dlane-latacora 2021-05-24 15:59:47 -05:00 committed by GitHub
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@ -4,67 +4,69 @@
(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" __))
(= nil (get "Characters" "C"))
"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)))
(= "112321233" (string/join "123" '(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? ""))
"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?"))
)