ghoseb/ns-cheatsheet.clj

What is the meaning of :refer in the following :
(:require [io.pedestal.service.http.route.definition :refer [defroutes]]

thanks!

Hmm. On "what means (:require [io.pedestal.service.http.route.definition :refer [defroutes]]) ", I got two hypotheses :

1. (:require [io.pedestal.service.http.route.definition])
   (:use [io.pedestal.service.http.route.definition :only [defroutes]])
2. (:use [io.pedestal.service.http.route.definition :only [defroutes]])

Don't know which would be right :/ if any ;)

I think I got it.

On the pedestal tutorial, http://pedestal.io/documentation/connecting-to-datomic/
I found :
(:require [datomic.api :as d :refer (q)]))

where we get access to every function by prefixing d/ in front of it. Except for the q function that we can access directly, thanks to :refer.

:)

I suggest adding the following as the combination of :only and :rename:

;; Refers sqrt into current NS as ccm-sqrt, other math functions are not
;; refered, e.g.
;; (ccm-sqrt 4)
[:use [clojure.contrib.math :only [sqrt] :rename {sqrt ccm-sqrt}]]

@cmpitg as far as I know :use is deprecated.

:refer lets you use the function without the namespace qualifier.

(ns wawa
(:require [datomic.api :as d :refer [q]]))

(= (d/q args) (q args) (datomic.api/q args) )

Awesome. I never get this right.

In my case, i need to set require with refering to some function, but already have that name bounded to another func(addevent). It's was too straightforward for me to be assume immediately.

(ns project.handler.addevent
    (:require 
        [project.view.pages :refer [addevent] :rename {addevent addevent-page}))

thanks bro greetings get to know