随笔分类 -  函数式语言

摘要："emmet.triggerExpansionOnTab": true, "files.associations": { "*.js": "javascript", "*.ex": "elixir", "*.exs": "elixir", "*.eex": "html", "*.html.eex": 阅读全文

摘要：test "map.mergd" do s = :crypto.strong_rand_bytes(32) # <<116, 101, 115, 116, 58, 0>> # = "test:" <> <<0>> # IO.inspect(String.slice(b, 0, 4)) c = "te 阅读全文

摘要：99 bottles of beer on the wall, 99 bottles of beer.Take one down and pass it around, 98 bottles of beer on the wall. 98 bottles of beer on the wall, 9 阅读全文

摘要：defmodule My do defstruct password: "", apassword_hash: "", aencrypted_password: "" end m = %My{ :password => "123", :apassword_hash => Bcrypt.hash_pwd_salt("111111"), :aencrypt... 阅读全文

摘要：https://stackoverflow.com/questions/4579226/what-does-do-in-clojure 阅读全文

摘要：原地址 http://stackoverflow.com/questions/11662084/why-does-clojure-distinguish-between-symbols-and-vars?rq=1Symbols are namesUnlike most programming languages, Clojure makes a distinction betweenthingsand thenamesof things. In most languages, if I say something likevar x = 1, then it is correct and co 阅读全文

摘要：转自 http://zh.wikipedia.org/zh-tw/%E5%87%BD%E6%95%B0%E5%89%AF%E4%BD%9C%E7%94%A8在計算機科學中，函數副作用指當調用函數時，除了返回函數值之外，還對主調用函數產生附加的影響。例如修改全局變數（函數外的變數）或修改參數。函數副作用會給程序設計帶來不必要的麻煩，給程序帶來十分難以查找的錯誤，並且降低程序的可讀性。嚴格的函數式語言要求函數必須無副作用。下面是函數的副作用相關的幾個概念， 純函數(Pure Function)、非純函數(Impure Function)、引用透明(Referential Transparent)。 阅读全文