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lambda and map syntax #2

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lambda and map syntax #2

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545a11a
manual cherry pick of map syntax to master
alvarogarcia7 Oct 21, 2015
bd75de6
add syntax guide for lambda
alvarogarcia7 Oct 21, 2015
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32 changes: 31 additions & 1 deletion src/intro-clojure/basics.clj
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Original file line number Diff line number Diff line change
Expand Up @@ -199,10 +199,40 @@
(+)

;; count a's in a sentence
;; ??? should #(%) be introduced?
;; lambda syntax

;; a #() is the syntax for the lambda
(#(-> 3)) ; 3

(#(inc %) 1) ;2

(#(= % %) 1) ;true
(#(= % %) 2) ;true... always true

; syntax for the first, second parameter
(#(= %1 %2) 10 11) ;false
(#(= %1 %2) 10 10) ;true

; syntax for the first parameter
(#(= % %2) 10 10) ;true

(count (filter #(= \a %) "mama"))

;; squares
(take 10 (map #(* % %) (range)))

;; explain map syntax

;; map syntax
;; remember
(=
(inc 1)
2)

;;simpler
(map inc [1 2 3])

;;more difficult
(take 10 (map inc (range)))

)