clojure-koans/src/koans/20_java_interop.clj

(ns koans.20-java-interop
  (:require [koan-engine.core :refer :all]))

(meditations
  "You may have done more with Java than you know"
  (= java.lang.String (class "warfare")) ; hint: try typing (javadoc "warfare") in the REPL

  "The dot signifies easy and direct Java interoperation"
  (= "SELECT * FROM" (.toUpperCase "select * from"))

  "But instance method calls are very different from normal functions"
  (= ["SELECT" "FROM" "WHERE"] (map #(.toUpperCase %) ["select" "from" "where"]))

  "Constructing might be harder than breaking"
  (= 10 (let [latch (java.util.concurrent.CountDownLatch. 10)]
          (.getCount latch)))

  "Static methods are slashing prices!"
  (== 1024 (Math/pow 2 10)))
Change file/ns names for everything and add 02_strings 2015-09-13 05:28:39 +00:00			`(ns koans.20-java-interop`
Bump koan-engine dependency Also eliminates some ns forms that we can do without now. Closes #71 2014-05-02 21:37:11 +00:00			`(:require [koan-engine.core :refer :all]))`
Add name-spaces to the clojure koans files. This commit adds two name-spaces to beginning of the clojure koan files in order to fix an issue both #68 and #69. 2014-01-26 00:04:22 +00:00
Add first cut at Java interop 2011-07-08 20:57:44 +00:00			`(meditations`
			`"You may have done more with Java than you know"`
20 2023-01-04 16:15:43 +00:00			`(= java.lang.String (class "warfare")) ; hint: try typing (javadoc "warfare") in the REPL`
Add first cut at Java interop 2011-07-08 20:57:44 +00:00
			`"The dot signifies easy and direct Java interoperation"`
20 2023-01-04 16:15:43 +00:00			`(= "SELECT * FROM" (.toUpperCase "select * from"))`
Add first cut at Java interop 2011-07-08 20:57:44 +00:00
			`"But instance method calls are very different from normal functions"`
20 2023-01-04 16:15:43 +00:00			`(= ["SELECT" "FROM" "WHERE"] (map #(.toUpperCase %) ["select" "from" "where"]))`
Add first cut at Java interop 2011-07-08 20:57:44 +00:00
			`"Constructing might be harder than breaking"`
20 2023-01-04 16:15:43 +00:00			`(= 10 (let [latch (java.util.concurrent.CountDownLatch. 10)]`
Add first cut at Java interop 2011-07-08 20:57:44 +00:00			`(.getCount latch)))`

			`"Static methods are slashing prices!"`
20 2023-01-04 16:15:43 +00:00			`(== 1024 (Math/pow 2 10)))`