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Ruby Doctest

Doctest in Python is a good design. Doctest ensures code, documentation, and tests are in a single place. So readers can understand the logic of code easier, without a lot of navigation.

Unlike Python, Ruby does not have built-in doctest, but there are some third party libraries enabling doctest in Ruby.

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Command line UI in Ruby

ruby -s

If you just want some switches, then you can use ruby -s:

Switches will be stored as global variable with true as their value:

#!/usr/bin/env ruby -s

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Ruby API Doc

docco

docco supports a lot of languages, including Ruby.

RDoc

Ruby's built in.

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DnD 5e basic rules

Features

1. Free for personal use.
2. The three pillars of adventure are listed as exploration, social interaction, and combat. The Combat section itself is only 9 pages.
3. Light rules covering 4 classes and 4 races, with an emphasis on DM (Dungeon Master) discretion. Complex bonus system is replaced with advantages and disadvantages. The PDF has 110 pages.

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What is new in Ceylon 1.3

Static members

When to use static members instead of toplevel methods or values:

• when a function needs to access private members of a class
• when a class needs to define private state or constants that are shared by all instances

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#!/bin/sh

os="$(uname)"

case "$os" in
    'Linux')
        cp "$HOME/.config/vivaldi/Default/Bookmarks" ./
    ;;
    'Darwin')
        cp "$HOME/Library/Application Support/Vivaldi/Default/Bookmarks" ./

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Host gist.github.com
  User git
  ProxyCommand nc -x localhost:1080 %h %p

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Brian Christian, Tom Griffiths. 2016-4-19. Algorithms to Live By[M]. He: Henry Holt and Co.. ISBN 9781627790369

这本书，算法科普得并不清楚，结合生活的部分又很啰嗦。不过这个思路是值得肯定的。有时候编程的时候知道用算法，一到生活中就忘了用。比如第3章“排序”，就提到让东西乱糟糟的有时反而是最高效的。编程的时候都知道，如果以后不搜索或极少搜索，那就没必要排序。但生活中有时却会不假思索地给东西排序，这其实是一种强迫症。再比如第4章“缓存”的LRU，用于归纳整理乃至丢弃物品很有用。以及第7章“过拟合”提到的更少的信息、计算和时间实际上有时能加快进度。还有第8章的“Relaxation”，例如，当你拿不定主意如何选择工作的时候，不妨假定每个工作的报酬都是一样的。以及最重要的第9章“随机性”，很多问题都可以通过随机方法解决。第7章、第8章、第9章简直就是我这样选择困难症的救星。

第2章“Explore/Exploit”没有考虑到探索潜在的奖励（惩罚）：你更厌恶乏味还是不确定性？

第5章“规划”提到首先完成处理时间较短的任务能让你建立信心，从而加快进度。但有时候先完成难的、大的任务，会发觉容易的、小的任务不值得完成了。

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Haskell:the Craft of Functional Programming (3rd. Edition)

This book is based on Haskell 2010.

It introduces features of Haskell in the following chapters:

1. Chapter 13: type class
2. Chapter 17: laziness
3. Chapter 18: monad
4. Chapter 19: DSL

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• 神门十三剑（武当） 专刺手腕神门穴。

• 柳絮剑法（慕容） 缓缓刺出，轻飘飘的没有声响。

• 三分剑术（天山） 以快打慢，以变扰敌。每一手都只使到三分之一为止，未待对方招架，自己招术已变。一招中包含三招，最为繁杂凶狠。这派剑术没有守势，全都是进攻杀着。

• 雨打飞花剑法（昆仑）