函数式编程是不同于OO的另外一种编程思想，不搞懂了，怎么开发？
Haskell趣学指南
[我是List Comprehension](http://fleurer-lee.com/lyah/ready-begin.htm#我是List Comprehension)
[Let it be](http://fleurer-lee.com/lyah/syntax-on-function.htm#Let it be)
[map 与 filter](http://fleurer-lee.com/lyah/high-order-function.htm#map 与 filter)
[Record Syntax](http://fleurer-lee.com/lyah/make-types-and-classes-for-ourselves.htm#Record Syntax)
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