I was trying to combine 2 maps into a new map, as you can see here. I
printed both maps to the screen so I could see that, indeed, they were both
maps. And yet I got a NullPointerException on the last line here:
(defn update-config
[more-config]
(swap! config-holder
(fn [old-config
Hi everyone,
I'm reading the excellent 'Functionnal programming for OO programmer' and I
encounter an issue understanding how the '=' function works.
We have a 'Triangle' structure defined by a map of 'Point's
so a Triangle is like {:point1 {:x 1 :y 1} :point2 {:x 1 :y 1} :point3 {:x
4 :y 2}}
I was recently informed about https://github.com/nickbauman/cljgae-template
which aims to provide a GAE template for leiningen projects. As it didn't exist
when I started with GAE, I wrote up a summary of my experience bootstrapping
things here: https://blog.jeaye.com/2016/08/23/clojure-app-engi
`into` with more three arguments is a variant where the middle argument is
a transducer. So your original code was trying to use default-config as a
transducer, this code would work with either merge or into chained with ->:
(-> {} (into default-config) (into more-config))
I recently did a tutori
Map equality is checked by verifying that the two maps have the same set of
keys and that each key is mapped to = values.
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Kern is a text-parsing library: https://github.com/blancas/kern
1.1.0 has two fixes (times, <+>); operator <*> minimum arity is now 1
(formerly 2).
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Is there a special check when the equality is asked on map ?
I thought the evaluator evaluate all the expression the same way , by
substituting each expression contained in the list to other evaluators.
In the book, the author tells the substitution rule for function evaluation
is responsible f
I'm a real newbe to clojure and functionnal programming but reading your
answer raised a question :
Where do you "store" the stopwatch object which you are passing to all your
functions ?
I understand that mutability is not needed to develop the functions you
described but all of them take a
On Dec 10, 2016 1:47 AM, "Didier" wrote:
I'm wondering what everyone thinks of using closures to mimic a simplistic
object system in Clojure? I'm not sure what to think of it yet, but the
idea is that you wrap object fields inside a closed function, and it
returns a map of methods that operates o
On Saturday, December 17, 2016 at 3:54:07 PM UTC-6, Rafo Ufoun wrote:
>
> Is there a special check when the equality is asked on map ?
>
= does different things for different kinds of values, so in some sense
yes. The implementation for maps (written in Java) is here:
https://github.com/clojur
On 17 December 2016 at 22:13, Rafo Ufoun wrote:
> I'm a real newbe to clojure and functionnal programming but reading your
> answer raised a question :
>
> Where do you "store" the stopwatch object which you are passing to all
> your functions ?
>
> I understand that mutability is not needed to d
Thank you. I do move and rename the file, though even knowing when to move
to it depends on knowing when it is fully uploaded.
In this case, we have many ways that the files might be uploaded, so I
prefer to deal with the file inside of Clojure, rather than trying to
customize each of the dif
Very clear thank you !
I can't wait to know these concept as I am discovering clojure with the
'Functionnal programming for OO programmer' book. Thank you again
Le samedi 17 décembre 2016 18:53:31 UTC-5, James Reeves a écrit :
>
> On 17 December 2016 at 22:13, Rafo Ufoun > wrote:
>
>> I'm a re
Your explanation is more understandable, thank you !
It's easier to get the full picture about '=' now that I know there are one
implementation of this function for "each" data type. (I say "each" because
I think some multiple types can share the same implementation).
Thank you again, you help
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