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

Document NON-ELEM.

Browse source
This commit is contained in:
Michael Fogleman 2017-09-11 10:57:20 -04:00
parent 8d265f33a7
commit 161a616ada
1 changed files with 12 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

12
List-of-Navigators.md
View file

@ -21,6 +21,7 @@
- [NIL->LIST](#nil-list) - [NIL->LIST](#nil-list)
- [NIL->SET](#nil-set) - [NIL->SET](#nil-set)
- [NIL->VECTOR](#nil-vector) - [NIL->VECTOR](#nil-vector)
- [NONE-ELEM](#none-elem)
- [STAY](#stay) - [STAY](#stay)
- [STOP](#stop) - [STOP](#stop)
- [VAL](#val) - [VAL](#val)
@ -298,6 +299,17 @@ the structure has no metadata or may not contain metadata.
:foo :foo
``` ```
## NONE-ELEM
`NONE-ELEM` navigates to the 'void' elem in a set. For transformations - if the result is not `NONE`, then add that value to the set.
```
=> (setval NONE-ELEM 3 #{1 2})
#{1 2 3}
=> (setval NONE-ELEM 1 nil)
#{1}
```
## STAY ## STAY
`STAY` stays in place. It is the no-op navigator. `STAY` stays in place. It is the no-op navigator.