Specter is a library that supercharges your ability to work with regular Clojure data structures. Happy to announce I just released 1.0, a huge milestone for the project.
I also wrote a post about why I consider Specter to be Clojure's missing piece: http://nathanmarz.com/blog/clojures-missing-piece.html This release implements the most requested feature for Specter, which is the ability to easily remove values from maps or sequences. Examples: (setval [ALL nil?] NONE [1 2 nil 3 nil]) => [1 2 3] (setval [:a (nthpath 1)] NONE {:a [1 2 3]}) => {:a [1 3]} (setval [MAP-VALS even?] NONE {:a 1 :b 2 :c 3 :d 4}) => {:a 1 :c 3} (setval FIRST NONE [1 2 3]) => [2 3] This release also provides full integration with Clojure's transducers, allowing you to express many transducer operations much more elegantly: ;; Using Vanilla Clojure (transduce (comp (map :a) (mapcat identity) (filter odd?)) + [{:a [1 2]} {:a [3]} {:a [4 5]}]) ;; => 9 ;; The same logic expressed with Specter (transduce (traverse-all [:a ALL odd?]) + [{:a [1 2]} {:a [3]} {:a [4 5]}]) See the release notes and blog post for more details. Release notes: * Transform to `com.rpl.specter/NONE` to remove elements from data structures. Works with `keypath` (for both sequences and maps), `must`, `nthpath`, `ALL`, `MAP-VALS`, `FIRST`, and `LAST` * Add `nthpath` navigator * Add `with-fresh-collected` higher order navigator * Added `traverse-all` which returns a transducer that traverses over all elements matching the given path. * `select-first` and `select-any` now avoid traversal beyond the first value matched by the path (like when using `ALL`), so they are faster now for those use cases. * Add `MAP-KEYS` navigator that's more efficient than `[ALL FIRST]` * Add `NAME` and `NAMESPACE` navigators * Extend `srange`, `BEGINNING`, `END` to work on strings. Navigates to a substring. * Extend `FIRST` and `LAST` to work on strings. Navigates to a character. * Add `BEFORE-ELEM` and `AFTER-ELEM` for prepending or appending a single element to a sequence * Add `NONE-ELEM` to efficiently add a single element to a set * Improved `ALL` performance for PersistentHashSet * Dynamic navs automatically compile sequence returns if completely static * Eliminate reflection warnings for clj (thanks @mpenet) * Bug fix: Collected vals now properly passed to subpaths for `if-path`, `selected?`, and `not-selected?` * Bug fix: `LAST`, `FIRST`, `BEGINNING`, and `END` properly transform subvector types to a vector type -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
