robertluo.pull
Simple pull API inspired by datomic Pull API, but can be used on any ILookup instance
Simple pull API inspired by datomic Pull API, but can be used on any ILookup instance
private-attrsclj
If some private key-values in your data you do not want pull to return, for
instance, password or other sensitive data, you can use this function to
hide some attributes:
(private-attrs #{:hidden} {:a :hidden})
Uses clojure 1.10 's meta extending protocol, can not work on prior version of clojure
If some private key-values in your data you do not want pull to return, for
instance, password or other sensitive data, you can use this function to
hide some attributes:
`(private-attrs #{:hidden} {:a :hidden})`
Uses clojure 1.10 's meta extending protocol, can not work on prior version of
clojurepullclj
Returns data specified by pattern inside data.
data can be a ILookup instance (for example, a map, or a lookup of fun-map), or a sequential of ILookup.
A pattern is a vector, contains keys or joins, with keys in patterns, pull
acts just like clojure.core/select-keys:
(pull {:a 3 :b 5 :c 6} [:a :c]) => {:a 3 :c 6}
A join in the pattern is a map with its keys corresponding keys in data, while
value is another pattern. So this nested pattern can travel nested data:
(pull {:a 3 :b 5 :c [{:ca 4, :cb :foo} {:ca -1, :cb :bar}]} [:a {:c [:ca]}])
=> {:a 3 :c [{:ca 4} {:ca -1}]}
A map (ILookup) has to specific a join to pull, otherwise its value will be returned as :robertluo.pull/join-required.
Returns data specified by pattern inside data.
data can be a ILookup instance (for example, a map, or a lookup of fun-map), or
a sequential of ILookup.
A pattern is a vector, contains keys or joins, with keys in patterns, pull
acts just like clojure.core/select-keys:
`(pull {:a 3 :b 5 :c 6} [:a :c]) => {:a 3 :c 6}`
A join in the pattern is a map with its keys corresponding keys in data, while
value is another pattern. So this nested pattern can travel nested data:
```
(pull {:a 3 :b 5 :c [{:ca 4, :cb :foo} {:ca -1, :cb :bar}]} [:a {:c [:ca]}])
=> {:a 3 :c [{:ca 4} {:ca -1}]}
```
A map (ILookup) has to specific a join to pull, otherwise its value will be returned
as :robertluo.pull/join-required.
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