status-im
/
re-frame
mirror of https://github.com/status-im/re-frame.git
2
0
Fork 0
Code Issues Projects Releases Wiki Activity

Improve comment on function

This commit is contained in:
Mike Thompson 2016-06-24 18:49:42 +10:00
parent 8ec8745a26
commit a8b35cd9f1
1 changed files with 4 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
src/re_frame/handlers.cljs
View File

@ -20,14 +20,12 @@
(defn comp-middleware
"Given a vector of middleware, filter out any nils, and use \"comp\" to compose the elements.
v can have nested vectors, and will be flattened before \"comp\" is applied.
For convienience, if v is a function (assumed to be middleware already), just return it.
"Use \"comp\" to compose a vector 'v' of middleware.
For convienience, if 'v' is a function (assumed to be middleware already), return it unchanged.
Prior to the \"comp\", flatten is used to remove all nested vectors, and nils are removed.
Filtering out nils allows us to create Middleware conditionally like this:
(comp-middleware [pure (when debug? debug)]) ;; that 'when' might leave a nil
"
(comp-middleware [pure (when debug? debug)]) ;; that 'when' might leave a nil"
[v]
(cond
(fn? v) v ;; assumed to be existing middleware
(coll? v) (let [v (remove nil? (flatten v))]