CODEWITHSUNDEEP
clojure
zach
zach

Reputation: 31003

Unpacking a list in Clojure

I am using the Analemma library to make some svg figures. To make more complicated figures I wanted to break up the svg into components that could be generated in a different function and passed to the main svg function. Simple enough idea, right?

Well I keep getting tripped up when I try to pass a list of values and am not really sure how to get around the issue. In python you would be able to unpack the list using *list and I am wondering what an equivalent would be in clojure.

If there is no equivalent I wold appreciate any pointers about how to accomplish the same goal.

(use 'analemma.svg)

;set a line
(def oneline (->  
               (line 0 0 100 100)
               (style :stroke "#006600" :stroke-width 3)))

;create an SVG by passing one or more line elements works fine
; this works 
(svg oneline)
; so does this
(svg oneline oneline)

; but if i have a list of lines created in a different function  i have a problem
(def manylines (repeat 5 oneline))
; this will not work
(svg manylines)

;I've tried the following but this doensn't work eaither becasue it mushes the list all together
(svg (apply concat manylines))

thanks zach cp

Upvotes: 0

Views: 1685

Answers (1)

ymonad
ymonad

Reputation: 12090

maybe you are looking for something like

(apply svg manylines)

this would produce same result as

(svg oneline oneline oneline oneline oneline)

Upvotes: 7

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