In Clojure, how do I make a nested map return a map with an inner map all set to 0?
So basically how do I make a function given the input {:A 1 :B 2 :C {:X 5 :Y 5 :Z 5} :D 1} and the key :C
return {:A 1 :B 2 :C {:X 0 :Y 0 :Z 0} :D 1}? It's the same mapping but with the nested map all set to 0. Given that we know that the key :C has the nested values.
I'm very new to clojure and I'm struggling with loops and iterations so any help would be appreciated.
Thanks.
clojure maps iteration
asked Nov 18 '18 at 20:21
John SlaineJohn Slaine
748
add a comment |
So basically how do I make a function given the input {:A 1 :B 2 :C {:X 5 :Y 5 :Z 5} :D 1} and the key :C
return {:A 1 :B 2 :C {:X 0 :Y 0 :Z 0} :D 1}? It's the same mapping but with the nested map all set to 0. Given that we know that the key :C has the nested values.
I'm very new to clojure and I'm struggling with loops and iterations so any help would be appreciated.
Thanks.
clojure maps iteration
asked Nov 18 '18 at 20:21
John SlaineJohn Slaine
748
Please add what you have tried so far, so we can improve from there.
– cfrick
Nov 18 '18 at 20:23
Also "nested" as in the example (first level) or all nesting (so basically all, but the first level)?
– cfrick
Nov 18 '18 at 20:25
@cfrick I mean given that we know that :C is the key with the "nesting" we should only set its values to 0
– John Slaine
Nov 18 '18 at 20:32
add a comment |
So basically how do I make a function given the input {:A 1 :B 2 :C {:X 5 :Y 5 :Z 5} :D 1} and the key :C
return {:A 1 :B 2 :C {:X 0 :Y 0 :Z 0} :D 1}? It's the same mapping but with the nested map all set to 0. Given that we know that the key :C has the nested values.
I'm very new to clojure and I'm struggling with loops and iterations so any help would be appreciated.
Thanks.
clojure maps iteration
asked Nov 18 '18 at 20:21
John SlaineJohn Slaine
748
So basically how do I make a function given the input {:A 1 :B 2 :C {:X 5 :Y 5 :Z 5} :D 1} and the key :C
return {:A 1 :B 2 :C {:X 0 :Y 0 :Z 0} :D 1}? It's the same mapping but with the nested map all set to 0. Given that we know that the key :C has the nested values.
I'm very new to clojure and I'm struggling with loops and iterations so any help would be appreciated.
Thanks.
clojure maps iteration
clojure maps iteration
asked Nov 18 '18 at 20:21
John SlaineJohn Slaine
748
asked Nov 18 '18 at 20:21
John SlaineJohn Slaine
748
edited Nov 18 '18 at 20:30
John Slaine
asked Nov 18 '18 at 20:21
John SlaineJohn Slaine
748
asked Nov 18 '18 at 20:21
John SlaineJohn Slaine
748
asked Nov 18 '18 at 20:21
John SlaineJohn Slaine
748
748
Please add what you have tried so far, so we can improve from there.
– cfrick
Nov 18 '18 at 20:23
Also "nested" as in the example (first level) or all nesting (so basically all, but the first level)?
– cfrick
Nov 18 '18 at 20:25
@cfrick I mean given that we know that :C is the key with the "nesting" we should only set its values to 0
– John Slaine
Nov 18 '18 at 20:32
add a comment |
Please add what you have tried so far, so we can improve from there.
– cfrick
Nov 18 '18 at 20:23
Also "nested" as in the example (first level) or all nesting (so basically all, but the first level)?
– cfrick
Nov 18 '18 at 20:25
@cfrick I mean given that we know that :C is the key with the "nesting" we should only set its values to 0
– John Slaine
Nov 18 '18 at 20:32
Please add what you have tried so far, so we can improve from there.
– cfrick
Nov 18 '18 at 20:23
Please add what you have tried so far, so we can improve from there.
– cfrick
Nov 18 '18 at 20:23
Also "nested" as in the example (first level) or all nesting (so basically all, but the first level)?
– cfrick
Nov 18 '18 at 20:25
Also "nested" as in the example (first level) or all nesting (so basically all, but the first level)?
– cfrick
Nov 18 '18 at 20:25
@cfrick I mean given that we know that :C is the key with the "nesting" we should only set its values to 0
– John Slaine
Nov 18 '18 at 20:32
@cfrick I mean given that we know that :C is the key with the "nesting" we should only set its values to 0
– John Slaine
Nov 18 '18 at 20:32
add a comment |
1 Answer
1
active
oldest
votes
(defn with-zero-vals-at-key
[m k]
(update m k (fn [m2] (zipmap (keys m2) (repeat 0)))))
(with-zero-vals-at-key {:A 1 :B 2 :C {:X 5 :Y 5 :Z 5} :D 1} :C)
;; => {:A 1, :B 2, :C {:X 0, :Y 0, :Z 0}, :D 1}
;; OR
(defn with-zero-vals
[m]
(zipmap (keys m) (repeat 0)))
(update {:A 1 :B 2 :C {:X 5 :Y 5 :Z 5} :D 1}
:C
with-zero-vals)
;; => {:A 1, :B 2, :C {:X 0, :Y 0, :Z 0}, :D 1}
answered Nov 18 '18 at 20:47
gfredericksgfredericks
1,010311
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
(defn with-zero-vals-at-key
[m k]
(update m k (fn [m2] (zipmap (keys m2) (repeat 0)))))
(with-zero-vals-at-key {:A 1 :B 2 :C {:X 5 :Y 5 :Z 5} :D 1} :C)
;; => {:A 1, :B 2, :C {:X 0, :Y 0, :Z 0}, :D 1}
;; OR
(defn with-zero-vals
[m]
(zipmap (keys m) (repeat 0)))
(update {:A 1 :B 2 :C {:X 5 :Y 5 :Z 5} :D 1}
:C
with-zero-vals)
;; => {:A 1, :B 2, :C {:X 0, :Y 0, :Z 0}, :D 1}
answered Nov 18 '18 at 20:47
gfredericksgfredericks
1,010311
add a comment |
(defn with-zero-vals-at-key
[m k]
(update m k (fn [m2] (zipmap (keys m2) (repeat 0)))))
(with-zero-vals-at-key {:A 1 :B 2 :C {:X 5 :Y 5 :Z 5} :D 1} :C)
;; => {:A 1, :B 2, :C {:X 0, :Y 0, :Z 0}, :D 1}
;; OR
(defn with-zero-vals
[m]
(zipmap (keys m) (repeat 0)))
(update {:A 1 :B 2 :C {:X 5 :Y 5 :Z 5} :D 1}
:C
with-zero-vals)
;; => {:A 1, :B 2, :C {:X 0, :Y 0, :Z 0}, :D 1}
answered Nov 18 '18 at 20:47
gfredericksgfredericks
1,010311
add a comment |
(defn with-zero-vals-at-key
[m k]
(update m k (fn [m2] (zipmap (keys m2) (repeat 0)))))
(with-zero-vals-at-key {:A 1 :B 2 :C {:X 5 :Y 5 :Z 5} :D 1} :C)
;; => {:A 1, :B 2, :C {:X 0, :Y 0, :Z 0}, :D 1}
;; OR
(defn with-zero-vals
[m]
(zipmap (keys m) (repeat 0)))
(update {:A 1 :B 2 :C {:X 5 :Y 5 :Z 5} :D 1}
:C
with-zero-vals)
;; => {:A 1, :B 2, :C {:X 0, :Y 0, :Z 0}, :D 1}
answered Nov 18 '18 at 20:47
gfredericksgfredericks
1,010311
(defn with-zero-vals-at-key
[m k]
(update m k (fn [m2] (zipmap (keys m2) (repeat 0)))))
(with-zero-vals-at-key {:A 1 :B 2 :C {:X 5 :Y 5 :Z 5} :D 1} :C)
;; => {:A 1, :B 2, :C {:X 0, :Y 0, :Z 0}, :D 1}
;; OR
(defn with-zero-vals
[m]
(zipmap (keys m) (repeat 0)))
(update {:A 1 :B 2 :C {:X 5 :Y 5 :Z 5} :D 1}
:C
with-zero-vals)
;; => {:A 1, :B 2, :C {:X 0, :Y 0, :Z 0}, :D 1}
answered Nov 18 '18 at 20:47
gfredericksgfredericks
1,010311
answered Nov 18 '18 at 20:47
gfredericksgfredericks
1,010311
answered Nov 18 '18 at 20:47
gfredericksgfredericks
1,010311
answered Nov 18 '18 at 20:47
gfredericksgfredericks
1,010311
1,010311
add a comment |
add a comment |
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Please add what you have tried so far, so we can improve from there.
– cfrick
Nov 18 '18 at 20:23
Also "nested" as in the example (first level) or all nesting (so basically all, but the first level)?
– cfrick
Nov 18 '18 at 20:25
@cfrick I mean given that we know that :C is the key with the "nesting" we should only set its values to 0
– John Slaine
Nov 18 '18 at 20:32