oseau

GROKKING NOTES

I liked the way Grokking the coding interview organized problems into learnable patterns. However, the course is expensive and the majority of the time the problems are copy-pasted from leetcode. As the explanations on leetcode are usually just as good, the course really boils down to being a glorified curated list of leetcode problems.

So below I made a list of leetcode problems that are as close to grokking problems as possible.

Pattern: Sliding Window

• https://leetcode-cn.com/problems/maximum-subarray/ # Close enough
• https://leetcode-cn.com/problems/minimum-size-subarray-sum/

oseau

#!/usr/bin/env python

"""Simple HTTP Server With Upload.

This module builds on BaseHTTPServer by implementing the standard GET
and HEAD requests in a fairly straightforward manner.

"""

oseau

Basics

Precedence

There’s none: only evaluation from right to left. Although adverbs and conjunctions are applied first.

Global Variables

=: is like `setq’

gvar =. 23
fun1 =: 3 : 0
gvar + y

oseau

// XPath CheatSheet
// To test XPath in your Chrome Debugger: $x('/html/body')
// http://www.jittuu.com/2012/2/14/Testing-XPath-In-Chrome/


// 0. XPath Examples.
// More: http://xpath.alephzarro.com/content/cheatsheet.html


'//hr[@class="edge" and position()=1]'                // every first hr of 'edge' class

oseau

// Node.js CheatSheet.
// Download the Node.js source code or a pre-built installer for your platform, and start developing today.
// Download: http://nodejs.org/download/
// More: http://nodejs.org/api/all.html


// 0. Synopsis.
// http://nodejs.org/api/synopsis.html

oseau

Python Number Conversion Chart

From	To	Expression

oseau

If you ever need to download an entire website, perhaps for off-line viewing, wget can do the job — for example:

$ wget --recursive --no-clobber --page-requisites --html-extension --convert-links --restrict-file-names=windows --domains website.org --no-parent  www.website.org/tutorials/html/

This command downloads the website www.website.org/tutorials/html/.

The options are:

• --recursive: download the entire website
• --domains website.org: don't follow links outside website.org

oseau

#!/usr/bin/env python
# link: http://www.emacswiki.org/emacs/PythonMode#toc7
#
# This is a script which runs and parses the output of various Python code
# checking programs to work with flymake. It has lots of issues, one being that
# flymake does not seem to show more than one error message per line of code,
# meaning that an error or warning which is intentionally left unfixed can mask
# an error or warning that would get more attention.
#
# Additionally, the scripts which check python code are either rather anemic,

oseau

Error in user YAML: (<unknown>): found character that cannot start any token while scanning for the next token at line 2 column 1

---
# Python 简介
@su27 and @menghan
---

What is Python?

Python: 优雅而健壮的编程语言

• 高级

• 易学易读易维护

oseau

<table>
	<caption>打开/前往</caption>
	<colgroup>
	<col style="text-align:left;width:150px"/>
	<col style="text-align:left;"/>
	</colgroup>
	<thead>
		<tr>
			<th scope="col">快捷键</th>
			<th scope="col">说明</th>