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Finish draft of all navigators.

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This commit is contained in:
Christopher O'Donnell 2016-06-11 16:20:38 -04:00
parent a542f8b353
commit b3204fa5a6
1 changed files with 33 additions and 2 deletions
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35
List-of-Navigators.md
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@ -10,8 +10,10 @@
[compiled-transform](#compiled-*) [cond-path](#cond-path) [continue-then-stay](#continue-then-stay)
[continuous-subseqs](#continuous-subseqs) [filterer](#filterer) [if-path](#if-path)
[keypath](#keypath) [multi-path](#multi-path) [must](#must) [nil->val](#nil->val)
[parser](#parser)
[not-selected?](#not-selected?) [selected?](#selected?)
[parser](#parser) [pred](#pred) [putval](#putval) [not-selected?](#not-selected?)
[selected?](#selected?) [srange](#srange) [srange-dynamic](#srange-dynamic)
[stay-then-continue](#stay-then-continue) [submap](#submap) [subselect](#subselect) [subset](#subset)
[transformed](#transformed) [view](#view) [walker](#walker)
## The All Caps Ones
@ -457,6 +459,35 @@ it to get the final value at this point.
["test@example.com" "test+spam@gmail.com"]
```
### pred
`(pred apred)`
Keeps the element only if it matches the supplied predicate. This is the
late-bound parameterized version of using a function directly in a path.
```clojure
=> (select [ALL (pred even?)] (range 10))
[0 2 4 6 8]
=> (let [p-path (comp-paths ALL pred)]
(select (p-path even?) (range 10)))
[0 2 4 6 8]
```
### putval
`(putval val)`
Adds an external value to the collected vals. Useful when additional arguments
are required to the transform function that would otherwise require partial
application or a wrapper function.
```clojure
;; incrementing val at path [:a :b] by 3
=> (transform [:a :b (putval 3)] + {:a {:b 0}})
{:a {:b 3}}
```
### not-selected?
`(not-selected? & path)`