luciano/specter-wiki
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Add recursive navigator example to declarepath.

Browse source
This commit is contained in:
Chris O'Donnell 2016-07-28 10:10:12 -04:00
parent 8a848a7734
commit c02e0ce474
1 changed files with 7 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
List-of-Macros.md
View file

@ -277,7 +277,7 @@ factor/cache the path.
`(declarepath name params)` `(declarepath name params)`
Declares a new symbol available to be defined as a path. If the path will require parameters, these must be specified here. The path itself must be defined using [providepath](#providepath). Declares a new symbol available to be defined as a path. If the path will require parameters, these must be specified here. The path itself must be defined using [providepath](#providepath). `declarepath` and `providepath` are great for defining recursive navigators, as seen in the second example below.
```clojure ```clojure
=> (declarepath SECOND) => (declarepath SECOND)
@ -286,6 +286,12 @@ Declares a new symbol available to be defined as a path. If the path will requir
1 1
=> (transform SECOND dec (range 5)) => (transform SECOND dec (range 5))
(0 0 2 3 4) (0 0 2 3 4)
=> (declarepath DEEP-MAP-VALS)
=> (providepath DEEP-MAP-VALS (if-path map? [MAP-VALS DEEP-MAP-VALS] STAY))
=> (select DEEP-MAP-VALS {:a {:b 2} :c {:d 3 :e {:f 4}} :g 5})
[2 3 4 5]
=> (transform DEEP-MAP-VALS inc {:a {:b 2} :c {:d 3 :e {:f 4}} :g 5})
{:a {:b 3}, :c {:d 4, :e {:f 5}}, :g 6}
``` ```