clj.where

A Clojure library designed to query maps in sequence.

Usage

Leiningen dependency information:

[clj.where "0.1.0"]

Use it in your namespace:

(use 'clj.where)

For example, you have a vector of key-value maps,such as:

    (def cats
       [
         {
          :name  "Bubbles"
          :favoriteFood "mice"
          :age 1
         },
         {
          :name "Sparkle"
          :favoriteFood "tuna"
         },
         {
          :name "flyingCat"
          :favoriteFood "mice"
          :age 1
         }
      ])

You want to filter with some properties,like:

user=> (where cats {:age 1})
;; ({:age 1, :name "Bubbles", :favoriteFood "mice"} {:age 1, :name "flyingCat", :favoriteFood "mice"})

user=> (where cats {:age 1 :name "Bubbles"})
;; ({:age 1, :name "Bubbles", :favoriteFood "mice"})

user=> (where cats {:age 1, :favoriteFood "tuna"})
;; ()

where accepts three arguments: the sequence, the query map, and the optional matcher function.The default matcher function is =.You can pass your custom matcher function,the matcher function accepts two arguments: the value in query map and the value in 'object' map with the same key.

License

Copyright © 2014 dennis zhuang

Distributed under the Eclipse Public License either version 1.0 or (at your option) any later version.