clojure-koans练习笔记2016-05-19 12:09
#### strings笔记
**get**使用姿势
get returns a value mapped to key, not-found or nil if not present. So to get \C we have to pass in the index 0.
:::clojure
koan-engine.runner=> (get "asd" 0)
\a
koan-engine.runner=> (get "asd" 1)
\s
koan-engine.runner=> (get "asd" -1)
Clojure中defstruct、deftype和defrecord使用区别2016-05-17 16:43
#### defstruct
:::clojure
user=> (defstruct Point1 :x :y)
#'user/Point1
user=> (def p1 (struct-map Point1 :x 3 :y 4))
#'user/p1
user=> (prn p1)
{:x 3, :y 4}
nil
user=> (prn (:x p1))
3
nil
user=> (prn (struct-map Point1 3 5))
{:x nil,
[转]Clojure中require、use和import的区别2016-03-16 16:51
#### 关于require
require只负责引入clojure库，不绑定函数到当前的ns中。
:::clojure
;;引入java io，并指定缩略名为io
(require '[clojure.java.io :as io])
;;使用
(io/file "Filename")
;;在ns中使用
(ns test
(:require [clojure.java.io :as io]))
Require, 等同python import
#### 关于refer
将函
......hello clojure2016-03-16 16:45
#### install jdk
download and install jdk:
#### install lein
brew install leiningen
#### new project
lein new myapp
#### project tree
:::text
myapp
├── LICENSE
├── README.md
├── doc
│ └── intro.md
├── project.clj
├── resources
