Re: Getting information from a hashmap that is inside anothe hashmap
Not quite. The -> operator basically puts the prior result in as argument
number one of the next statement, so you need to create an expression who,
when it has the result of :char put in position 1, returns a vector of eye
color and hair color
Luckily the core library has a function (juxt) which does exactly that -
given two functions makes the result of calling each on the same arguments.
So you need to create a function (juxt :ec :hc) and then you need to call
it by wrapping it in (). So
(-> human2 :char ((juxt :eye-colour :hair-color)))
There are, of course, a million other ways. Here's another which is may be
easier if you aren't so used to higher order functions.
(-> human2 :char (as-> sub [ (:eye-colour sub) (:hair-colour sub)]))
using the "as->" idiom which basically binds a variable in the subsequent
expression to the result of the prior expression in the -> (that's not
really what it does but in this context you can think of it that way).
Hope that helps!
On Thursday, November 24, 2016 at 7:17:17 AM UTC-5, Rickesh Bedia wrote:
>
> That makes sense. Thanks for the help.
>
> Also say I wanted to get both eye-colour and hair-colour.
> Could that be done by (-> human2 :char [:eye-colour :hair-colour])?
>
>
> On Tuesday, 22 November 2016 11:08:45 UTC, Bost wrote:
>>
>> (->> human2 :char :eye-colour) or
>> (-> human2 :char :eye-colour) or
>> ((human2 :char) :eye-colour) or
>> (:eye-colour (:char human2)) all variants work.
>>
>> Either way it looks like you're asking a very basic question.
>> I recomend you to go over http://clojurekoans.com/ or read some
>> tutorial, quick start guide etc.
>>
>>
>> 2016-11-22 11:42 GMT+01:00 'Rickesh Bedia' via Clojure
>> :
>> > Lets say I have:
>> > (def human {:firstname "John" :surname "Smith"})
>> > To get the firstname I would run (human :firstname) and this would give
>> > "John"
>> >
>> > However if I now have
>> > (def human2 {:name "Bob" :char {:eye-colour "brown" :hair-colour
>> > "red"}})
>> > how would I get the eye-colour? Would it be (human2 :char :eye-colour).
>> I
>> > just want the eye-colour
>> >
>> > Thanks in advance
>> >
>> > --
>> > You received this message because you are subscribed to the Google
>> > Groups "Clojure" group.
>> > To post to this group, send email to clo...@googlegroups.com
>> > Note that posts from new members are moderated - please be patient with
>> your
>> > first post.
>> > To unsubscribe from this group, send email to
>> > clojure+u...@googlegroups.com
>> > For more options, visit this group at
>> > http://groups.google.com/group/clojure?hl=en
>> > ---
>> > You received this message because you are subscribed to the Google
>> Groups
>> > "Clojure" group.
>> > To unsubscribe from this group and stop receiving emails from it, send
>> an
>> > email to clojure+u...@googlegroups.com.
>> > For more options, visit https://groups.google.com/d/optout.
>>
>
--
You received this message because you are subscribed to the Google
Groups "Clojure" group.
To post to this group, send email to clojure@googlegroups.com
Note that posts from new members are moderated - please be patient with your
first post.
To unsubscribe from this group, send email to
clojure+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/clojure?hl=en
---
You received this message because you are subscribed to the Google Groups
"Clojure" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to clojure+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
Re: Getting information from a hashmap that is inside anothe hashmap
That makes sense. Thanks for the help.
Also say I wanted to get both eye-colour and hair-colour.
Could that be done by (-> human2 :char [:eye-colour :hair-colour])?
On Tuesday, 22 November 2016 11:08:45 UTC, Bost wrote:
>
> (->> human2 :char :eye-colour) or
> (-> human2 :char :eye-colour) or
> ((human2 :char) :eye-colour) or
> (:eye-colour (:char human2)) all variants work.
>
> Either way it looks like you're asking a very basic question.
> I recomend you to go over http://clojurekoans.com/ or read some
> tutorial, quick start guide etc.
>
>
> 2016-11-22 11:42 GMT+01:00 'Rickesh Bedia' via Clojure
> >:
> > Lets say I have:
> > (def human {:firstname "John" :surname "Smith"})
> > To get the firstname I would run (human :firstname) and this would give
> > "John"
> >
> > However if I now have
> > (def human2 {:name "Bob" :char {:eye-colour "brown" :hair-colour
> > "red"}})
> > how would I get the eye-colour? Would it be (human2 :char :eye-colour).
> I
> > just want the eye-colour
> >
> > Thanks in advance
> >
> > --
> > You received this message because you are subscribed to the Google
> > Groups "Clojure" group.
> > To post to this group, send email to clo...@googlegroups.com
>
> > Note that posts from new members are moderated - please be patient with
> your
> > first post.
> > To unsubscribe from this group, send email to
> > clojure+u...@googlegroups.com
> > For more options, visit this group at
> > http://groups.google.com/group/clojure?hl=en
> > ---
> > You received this message because you are subscribed to the Google
> Groups
> > "Clojure" group.
> > To unsubscribe from this group and stop receiving emails from it, send
> an
> > email to clojure+u...@googlegroups.com .
> > For more options, visit https://groups.google.com/d/optout.
>
--
You received this message because you are subscribed to the Google
Groups "Clojure" group.
To post to this group, send email to clojure@googlegroups.com
Note that posts from new members are moderated - please be patient with your
first post.
To unsubscribe from this group, send email to
clojure+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/clojure?hl=en
---
You received this message because you are subscribed to the Google Groups
"Clojure" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to clojure+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
Re: Getting information from a hashmap that is inside anothe hashmap
(->> human2 :char :eye-colour) or
(-> human2 :char :eye-colour) or
((human2 :char) :eye-colour) or
(:eye-colour (:char human2)) all variants work.
Either way it looks like you're asking a very basic question.
I recomend you to go over http://clojurekoans.com/ or read some
tutorial, quick start guide etc.
2016-11-22 11:42 GMT+01:00 'Rickesh Bedia' via Clojure
:
> Lets say I have:
> (def human {:firstname "John" :surname "Smith"})
> To get the firstname I would run (human :firstname) and this would give
> "John"
>
> However if I now have
> (def human2 {:name "Bob" :char {:eye-colour "brown" :hair-colour
> "red"}})
> how would I get the eye-colour? Would it be (human2 :char :eye-colour). I
> just want the eye-colour
>
> Thanks in advance
>
> --
> You received this message because you are subscribed to the Google
> Groups "Clojure" group.
> To post to this group, send email to clojure@googlegroups.com
> Note that posts from new members are moderated - please be patient with your
> first post.
> To unsubscribe from this group, send email to
> clojure+unsubscr...@googlegroups.com
> For more options, visit this group at
> http://groups.google.com/group/clojure?hl=en
> ---
> You received this message because you are subscribed to the Google Groups
> "Clojure" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to clojure+unsubscr...@googlegroups.com.
> For more options, visit https://groups.google.com/d/optout.
--
You received this message because you are subscribed to the Google
Groups "Clojure" group.
To post to this group, send email to clojure@googlegroups.com
Note that posts from new members are moderated - please be patient with your
first post.
To unsubscribe from this group, send email to
clojure+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/clojure?hl=en
---
You received this message because you are subscribed to the Google Groups
"Clojure" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to clojure+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
Re: Getting information from a hashmap that is inside anothe hashmap
You may use `get-in`. https://clojuredocs.org/clojure.core/get-in
(get-in human2 [:char :eye-colour])
;=> "red"
Hope this helps.
~BG
On Tue, Nov 22, 2016 at 4:12 PM, 'Rickesh Bedia' via Clojure
wrote:
> Lets say I have:
> (def human {:firstname "John" :surname "Smith"})
> To get the firstname I would run (human :firstname) and this would give
> "John"
>
> However if I now have
> (def human2 {:name "Bob" :char {:eye-colour "brown" :hair-colour
> "red"}})
> how would I get the eye-colour? Would it be (human2 :char :eye-colour). I
> just want the eye-colour
>
> Thanks in advance
>
> --
> You received this message because you are subscribed to the Google
> Groups "Clojure" group.
> To post to this group, send email to clojure@googlegroups.com
> Note that posts from new members are moderated - please be patient with your
> first post.
> To unsubscribe from this group, send email to
> clojure+unsubscr...@googlegroups.com
> For more options, visit this group at
> http://groups.google.com/group/clojure?hl=en
> ---
> You received this message because you are subscribed to the Google Groups
> "Clojure" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to clojure+unsubscr...@googlegroups.com.
> For more options, visit https://groups.google.com/d/optout.
--
Baishampayan Ghose
b.ghose at gmail.com
--
You received this message because you are subscribed to the Google
Groups "Clojure" group.
To post to this group, send email to clojure@googlegroups.com
Note that posts from new members are moderated - please be patient with your
first post.
To unsubscribe from this group, send email to
clojure+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/clojure?hl=en
---
You received this message because you are subscribed to the Google Groups
"Clojure" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to clojure+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
Getting information from a hashmap that is inside anothe hashmap
Lets say I have:
(def human {:firstname "John" :surname "Smith"})
To get the firstname I would run (human :firstname) and this would give
"John"
However if I now have
(def human2 {:name "Bob" :char {:eye-colour "brown" :hair-colour
"red"}})
how would I get the eye-colour? Would it be (human2 :char :eye-colour). I
just want the eye-colour
Thanks in advance
--
You received this message because you are subscribed to the Google
Groups "Clojure" group.
To post to this group, send email to clojure@googlegroups.com
Note that posts from new members are moderated - please be patient with your
first post.
To unsubscribe from this group, send email to
clojure+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/clojure?hl=en
---
You received this message because you are subscribed to the Google Groups
"Clojure" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to clojure+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
