I use comp all the time, not only for transducers, but also for digging
into maps:
(map (comp first :pets)
[{:pets [:fluffy]}
{:pets [:spot]}])
=> (:fluffy, :spot)
Partial is also handy when used with a lot of sequence functions
(->> [1 2 3 4 5]
(filter (partial > 3)))
Sure I could write that function as #(< 3 %), but I find that syntax harder
to mentally parse as I have to remember that the body of the #() is a
function context and then I have to look up where the % symbol is. (partial
> 3) is just easier to understand.
Timothy
On Thu, Oct 27, 2016 at 6:12 PM, Mark Engelberg <mark.engelb...@gmail.com>
wrote:
> On Thu, Oct 27, 2016 at 9:39 AM, Alan Thompson <clooj...@gmail.com> wrote:
>
>> I almost never use either the `comp` or the `partial` functions. I think
>> it is clearer to either compose the functions like Gary showed, or to use a
>> threading macro (my favorite is the `it->` macro from the Tupelo library
>> <https://github.com/cloojure/tupelo#literate-threading-macro>).
>> Alan
>>
>>
> You need to use comp if you're building a transducer.
>
> --
> 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.
>
--
“One of the main causes of the fall of the Roman Empire was that–lacking
zero–they had no way to indicate successful termination of their C
programs.”
(Robert Firth)
--
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.
